pdfmanagement-testphase (23feb21)

git-svn-id: svn://tug.org/texlive/trunk@57862 c570f23f-e606-0410-a88d-b1316a301751

13 files changed, 12872 insertions, 0 deletions

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+% \iffalse meta-comment
+%
+%% File: hyperref-generic.dtx
+%
+% Copyright (C) 2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% The released version of this bundle is available from CTAN.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass{l3doc}
+\usepackage{tabularx,array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,
+  pdftitle=generic hyperref driver (LaTeX PDF management testphase bundle)}
+\premulticols=4cm
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+% \NewDocElement[
+%   idxgroup=hypersetup keys\actualchar\cs{hypersetup} keys,
+%   idxtype = {hypersetup key},
+%   printtype= \textit{setup key}
+%    ]{Hypkey}{xhypkey}
+% \ExplSyntaxOn
+% \NewDocumentEnvironment{hypkey}{m}
+% {
+%   \clist_map_inline:nn {#1}{\begin{xhypkey}{##1}}
+% }
+% {
+%   \clist_map_inline:nn {#1}{\end{xhypkey}}
+% }
+% \ExplSyntaxOff
+% \NewDocElement[
+%   idxgroup=color names,
+%   idxtype = {color name},
+%   printtype= \textit{color name}
+%    ]{HypColor}{xhypcolor}
+% \ExplSyntaxOn
+% \NewDocumentEnvironment{hypcolor}{m}
+% {
+%   \clist_map_inline:nn {#1}{\begin{xhypcolor}{##1}}
+% }
+% {
+%   \clist_map_inline:nn {#1}{\end{xhypcolor}}
+% }
+% \ExplSyntaxOff
+% \NewDocElement[
+%   idxgroup=Hooks,
+%   printtype= \textit{hook}
+%    ]{Hook}{hook}
+%
+% \title{^^A
+%   The \pkg{hyperref-generic} module  \\ A generic driver for hyperref ^^A
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+% This module generates a generic driver for \pkg{hyperref} meant to be used
+% with the new \LaTeX{} PDF management code. It is loaded automatically
+% if the PDF management code is active. The name of the driver will change after
+% the testphase.
+%
+% The generic driver can be used with pdflatex, lualatex, xelatex, latex with
+% dvipdfmx, latex with dvips+ps2pdf. latex with dvips+distiller could work too
+% but is untested. (x)dvipdfmx will probably soon support dvilualatex, then this
+% combination should work too.
+%
+% The driver \emph{requires} the new PDF management code, so documents wanting to use it
+% should start like this
+% \begin{verbatim}
+% \RequirePackage{pdfmanagement-testphase} %loads the code
+% \DeclareDocumentMetadata % activates it
+%   {
+%    %% options
+%    %% e.g. pdf version, backend:
+%    % pdfversion=1.7,
+%    % backend = dvipdfmx
+%   }
+%  \end{verbatim}
+%
+%  The new driver tries to be compatible with the standard \pkg{hyperref} drivers
+%  but there are nevertheless differences. Some of them due to the still experimental
+%  status of the driver, others are design decisions: one part of the project is
+%  to clean up and modernize the code. The following sections try to describe
+%  the differences but also to document some of the rationales of the changes,
+%  and to add some details and comments about the existing options and so to
+%  extend the \pkg{hyperref} manual.
+%
+%  \section{Avoiding transition problems}
+%  Some code will only work properly after other packages have been adapted to
+%  the new PDF management code and the changes in this driver.
+%  This will take some time. Until then it is recommended to follow
+%  the following rules
+%  \begin{itemize}
+%  \item Package options are processed at the end of the driver,
+%  Class options are ignored. But not every option already works as package options,
+%  in some cases \pkg{hyperref} interferes. So
+%  it is recommended for most options ---with the exception of a few mentioned below in
+%  section~\ref{sec:pkg-options}---to set them in \cs{hypersetup},
+%  not as package option.
+%  \item This driver uses \pkg{l3color} for the colors. All colors
+%  defined with \cs{color_set:nn} or \cs{color_set:nnn} will work.
+%  Colors defined with \pkg{xcolor} will work if they don't use one of
+%  the special color models not supported by \pkg{l3color} as
+%  \pkg{pdfmanagement-firstaid} contains a patch for xcolor.
+%  If the package \pkg{color} is used it is currently recommended to define
+%  colors after \pkg{hyperref}. This driver uses \pkg{l3color} for the colors,
+%  some special color models of \pkg{xcolor} won't work.
+%  \item Load a color package or graphicx to get the right page sizes.
+%  \item Report problems! Only known problem can be resolved.
+%  \end{itemize}
+%
+%
+%  \section{Bookmarks / outlines}
+%  The new driver doesn't contain code to handle bookmarks/outlines.
+%  Instead it forces the loading of the \pkg{bookmark} package
+%  unless the package option |bookmarks=false|
+%  has been used. Currently \pkg{bookmark} is loaded at the end of the preamble
+%  so if commands from \pkg{bookmark} are needed in the preamble the document
+%  should load it manually. This is subject to change at some time in the future.
+%
+%  \section{\enquote{Metadata}}
+%
+%  \enquote{Metadata}, informations about the document, are stored in a PDF in two
+%  places: The |/Info| dictionary and the XMP-metadata. \pkg{hyperref} only handles the
+%  |/Info| dictionary. The XMP-metadata can be added with like \pkg{pdfx} and
+%  \pkg{hyperxmp}.
+%
+%  The |/Info| dictionary can be filled with arbitrary keys, but the PDF viewer typically
+%  care only about a few, like |/Author|, |/Title| and |/Keywords|.
+%  A number of |/Info| keys, like dates and the producer, are added automatically
+%  by the engines and backends.
+%  Some of them can only be removed with special commands, some not at all.
+%  But---with the exception of |/Producer| when using the dvips backend---they
+%  can be overwritten.
+%
+%  The current handling of the metadata is problematic:
+%  \begin{itemize}
+%  \item External package like \pkg{hyperxmp} wants to access them too and for
+%  this had to patch an number of internal hyperref commands---which is a problem
+%  if the internal commands change (as happens with this new driver)
+%  \item \pkg {hyperref} (and also \pkg{hyperxmp})
+%  tries to deduce some datas from document commands like
+%  \cs{title} or \cs{author}---something that worked reasonably well when only
+%  some standard classes with well-known definitions of these command existed,
+%  but gets problematic with classes and packages which define
+%  more powerful commands knowing a variety of optional arguments to set authors and
+%  affiliations and title information.
+%  \end{itemize}
+%
+%  To resolve some of this problem the driver will
+%  \begin{itemize}
+%  \item \emph{Not} try deduce author and title from documents. They have to be set in
+%  \cs{hypersetup} with |pdfauthor| and |pdftitle|. It is recommended to separate
+%  more than one author by commas, and to hide commas inside braces if needed:
+%
+%  \begin{verbatim}
+%  pdfauthor = {Bär, Peter Anteater, {Riley, the sloth}}
+%  \end{verbatim}
+%  \item All values of relevant keys (including keys from the hyperxmp package)
+%  will be stored in a Metadata container, and can be retrieved with
+%  \cs{GetDocumentProperties}.
+%
+%  \begin{verbatim}
+%  \edef\my@pdfauthor{\GetDocumentProperties{hyperref/pdfauthor}}
+%  \end{verbatim}
+%  If the key hasn't be set, the result is empty. This gives external
+%  packages a public and reliable access to the data.
+%
+%  \item |pdflang| is deprecated. Instead \cs{DeclareDocumentMetadata}
+%  should be used:
+%  \begin{verbatim}
+%  \DeclareDocumentMetadata{lang=de-DE}
+%  \end{verbatim}
+%
+%  The value can be retrieved as |document/lang|.
+%
+%  \end{itemize}
+%  \section{Dates}
+%  \pkg{hyperref has a few keys to set dates}. They typically expect the date
+%  in \enquote{PDF} format: |D:YYYYMMDDhhmmss+01'00'|.
+%
+%  One should be aware that \pkg{hyperxmp} will sometimes
+%  overwrites such settings.
+%  ^^A XMP: yyyy-mm-ddThh:mm:ss+tt:tt, PDF: D:YYYYMMDDhhmmss+01'00'
+%
+%  \section{PDF page size (mediabox)}
+%  The standard \pkg{hyperref} driver contain code to set the PDF page size.
+%  There is no real justification why this is done by \pkg{hyperref} apart from the
+%  fact that \LaTeX{} itself doesn't do it and that the needed special code could
+%  be added to the backend drivers.
+%
+%  In the new driver this code is gone. The reason is not that it is
+%  difficult to set the MediaBox, actually it could be done with one line of code:
+%  \begin{verbatim}
+%  \pdfmanagement_add:nnn{Page}{MediaBox}
+%    {[0~0~\dim_to_decimal_in_bp:n{\paperwidth}~
+%          \dim_to_decimal_in_bp:n{\paperheight}]}
+%  \end{verbatim}
+%
+%  The problem is to know which value to use (with the memoir class e.g.\cs{stockwidth}
+%  should be used instead of \cs{paperwidth}),
+%  and detecting this not a \pkg{hyperref} task. Instead the packages which change
+%  these values should also set the PDF page size. Also there are
+%  too many actors here: color/graphicx, geometry,the KOMA-classes, memoir,
+%  \ldots\ all try to set this.
+%
+%  So if the PDF page size is wrong: load one of the other packages setting it
+%  e.g. the \pkg{color} or the \pkg{graphicx} package.
+%
+%
+%  \section{Link decorations: border, color, OCG-color, \ldots}
+%  Some main changes are
+%  \begin{itemize}
+%  \item The default colors have been changed.
+%  \item |citecolor| is no longer set with |allcolors| and it is not part of the
+%  color scheme, it is only supported for compability.
+%  \item a number of color schemes have been predefined.
+%  \end{itemize}
+%
+%  \subsection{Background information}
+%  With the standard drivers \pkg{hyperref} allows either to color the link text,
+%  or to use a border around it.
+%  There is also a (rather unknown) option |frenchlinks| to use small caps
+%  for some links instead of colors.
+%
+%  The \emph{link border} is a setting in the PDF annotation directory.
+%  It can be colored and styled (with the |<xxx>bordercolor|, |pdfborderstyle|
+%  and |pdfhighlight| keys), but the exact look depends on the PDF viewer.
+%  Such decorations are normally not  printed.
+%
+%  The \emph{link text} is colored with the standard color commands for text.
+%  Such a color is also printed, which is often not wanted. The printing
+%  can be avoided in PDF with so-called OCG-layers: They allow to add
+%  variants of a text along with instructions which variant should be used for
+%  viewing and which for printing. \pkg{hyperref} implements a rather simple version
+%  for links: The link text is put in a box and printed twice with different colors
+%  on different OCG layers. As boxes are used such links can't be broken. The
+%  package \pkg{ocgx2} implements a more sophisticated version which allows to
+%  use it for links broken over lines and pages.
+%
+%  \pkg{hyperref} has keys to set the color and border for |link|, |url|, |file|,
+%  |menu| and |run| types. They correspond to the PDF annotation types
+%  |GoTo|, |URI|, |GoToR|, |Named| and |Launch|.
+%  Beside this there is a |anchorcolor| which isn't used at all, and |citecolor|
+%  which is a semantical category and doesn't fit to the other types.
+%
+%  In the standard drivers the decoration options are more or less exclusive and global:
+%  One of the options (|colorlinks|, |ocgcolorlinks|, or borders) has to be
+%  chosen in the preamble and is then used for the whole document
+%  and all link types.
+%  Only colors and eventually the border style can be adjusted locally.
+%  But there is no technical reason for these restrictions:
+%  It is quite possible to change all these attributes
+%  at any time both by link type and locally. The restrictions of the current
+%  implementation can only be explained by the age of the code: \pkg{hyperref}
+%  has been created at a time when memory was small and the main drivers were html
+%  and postscript based.
+%
+%  While link colors have been traditionally more or less
+%  under the control of \pkg{hyperref},
+%  the situation with other format options, like the font, is more complicated.
+%  The font in \cs{url} is for example determined by \cs{Urlfont},
+%  a command from the \pkg{url} package.
+%  In the case of internal (GoTo) references packages like \pkg{cleveref} or
+%  \pkg{biblatex} or  \pkg{glossaries} offer formatting options too.
+%  Formatting here is often connected to semantics:
+%  an acronym should use a different font than a citation.
+%  While \pkg{hyperref} could offer options here, it would probably only clash
+%  with package formatting. It is more sensible not to interfere here. For this
+%  reason the |frenchlinks| option has been dropped.
+%
+%  \subsection{New Keys}
+%  Some of the existing keys have been extended to allow individual setting for
+%  the link types |link|, |url|, |file| |menu| and |run|:
+%
+%  \begin{itemize}
+%   \item Beside |pdfborder| there are also |linkborder|, |urlborder| etc
+%   \item Beside |pdfhighlight| there are also |linkhighlight|, |urlhighlight| etc
+%   \item Beside |pdfborderstyle| there are also |linkborderstyle|, |urlborderstyle| etc
+%   \item Beside |colorlinks| there are also |colorlink|, |colorurl| etc
+%   \item Beside |ocgcolorlinks| there are also |ocgcolorlink|, |ocgcolorurl|, etc %TODO
+%   \item Beside |hidelinks| there are also |hidelink|, |hideurl|, etc
+%   \item |bordercolormodel| allows to set the model used in annotations,
+%   the allowed values  are |rgb| or |cmyk|. |rgb| is the default.
+%   It does \emph{not} change the model of text colors. Be aware
+%   that while the PDF format allows cmyk (4 numbers) in the |/C| key of an annotation,
+%   this is often ignored by pdf viewers and the colors can be wrong.
+%   \item The boolean keys |url|, |link|, |run|, |menu|, |file| allow to deactivate
+%   locally the link types.
+%  \end{itemize}
+%
+%   \begin{hypkey}{colorscheme}
+%
+%   The new key |colorscheme| allows to switch the colors (both for text and borders)
+%   with a key word. It takes one of the values
+%   |orginal| (the colors as hyperref uses normally), |phelype|, |daleif|,
+%   |szabolcsA|, |szabolcsB|, |tivv|, |julian|, |henryford|.
+%
+%   The names refer to the authors in answers and comments in
+%   \url{https://tex.stackexchange.com/questions/525261/better-default-colors-for-hyperref-links}.
+%
+%   The default is |phelype|.
+%   \end{hypkey}
+%
+%  \subsection{Public interfaces}
+%  The |colorlinks| and |ocgcolorlinks| and related keys are
+%  using these booleans:
+%  \begin{verbatim}
+%     \l_hyp_annot_colorlink_bool,
+%     \l_hyp_annot_colorurl_bool,
+%     \l_hyp_annot_colorfile_bool,
+%     \l_hyp_annot_colorrun_bool,
+%     \l_hyp_annot_colormenu_bool,
+%     \l_hyp_annot_ocgcolorlink_bool,
+%     \l_hyp_annot_ocgcolorurl_bool,
+%     \l_hyp_annot_ocgcolorfile_bool,
+%     \l_hyp_annot_ocgcolorrun_bool,
+%     \l_hyp_annot_ocgcolormenu_bool,
+%  \end{verbatim}
+%
+%   They are both inserting hook code in the |pdfannot/link/|\meta{type}|/begin|
+%   and |pdfannot/link/|\meta{type}|/end| hooks. \meta{type} is one of
+%   |GoTo|, |URI|, |GoToR|, |Named| or |Launch|.
+%
+%   |colorlinks| uses the label |hyp/color|, and |ocgcolorlinks| the label |hyp/ocg|.
+%
+%   They both use the same color names: |hyp/color/link|, |hyp/color/url|,
+%   |hyp/color/file|, |hyp/color/run|, |hyp/color/menu|.
+%
+%   The cite colors uses the names |hyp/color/cite| and |hyp/color/citeborder|.
+%
+%   The border colors aren't saved in color names currently, but if the need
+%   would arise it would possible to change this.
+%  \subsection{Changed behaviour}
+%   \begin{description}
+%   \item[colorlinks] |colorlinks| will as before disable the |pdfborder|, but it is possible
+%    to use the key in the document at any time, or to reenable the border if wanted.
+%    Internally |colorlinks| \& friends will no longer define/undefine
+%    |\Hy@colorlink|, but instead use the hooks provided by the \pkg{l3pdfannot} package.
+%   \item Color keys accept the following input syntax:
+%
+%   \begin{tabular}{ll}
+%    model based      & |urlbordercolor = [rgb]{1,1,0}| \\
+%    color expression & |urlbordercolor =  red!50!blue| \\
+%    command          & |urlbordercolor = \mycolor|
+%   \end{tabular}
+%
+%    where |\mycolor| should expand to one of the other two syntax variants.
+%
+%   \item[frenchlinks] The option |frenchlinks| does nothing at all.
+%   \item[cite colors] As mentioned above the support for |citecolor|
+%   and |citebordercolor|   has been reduced. A package like \pkg{hyperref}
+%   can't keep track of such semantic
+%   contexts like cite, acronym, glossaries and special references and maintain keys for
+%   them. The keys are not completly dropped as this would affect packages like
+%   \pkg{natbib}, but they have been separated and are no longer affected by
+%   group keys like |allcolors|  but must be set individually instead.
+%
+%   \item[link margin] The driver sets a default link margin---this is identical
+%   to pdftex and luatex driver, but a change for the xetex and dvips driver.
+%   The (undocumentated) command \cs{setpdflinkmargin} does nothing.
+%   Use either the key |pdflinkmargin| or \cs{pdfannot_link_margin:n} to change the margin.
+%   See also the description in section~\ref{sec:keydesc} and in the hyperref manual.
+%   \end{description}
+%
+%  \section{PDF strings}
+%
+%  \pkg{hyperref} uses a command called \cs{pdfstringdef} to convert text input into
+%  something that makes sense and is valid in a PDF string, e.g. in the bookmarks
+%  or in the info dictionary or as form field values.
+%
+%  As the handling of the outlines are delegated to the \pkg{bookmark} package, they
+%  will for now still use \cs{pdfstringdef}, but all other strings produced by
+%  this driver will use a new method based on the expl3 commands
+%  \cs{text_purify:n} and  \cs{str_set_convert:Nnnn}. For normal text
+%  it shouldn't matter, but a variety of commands and math are handled differently.
+%  Like with \cs{pdfstringdef} they are a number of ways to adjust the outcome of
+% \cs{text_purify:n}. These are described in the expl3 documentation interface3.pdf.
+%
+% \emph{The new method is under heavy development!}
+%
+%  Important differences here are
+%  \begin{itemize}
+%    \item \emph{This new method requires that files are utf8-encoded}
+%      (at least if non-ascii chars are used in for PDF strings).
+%    \item \emph{All} robust commands are currently removed,
+%     unless an equivalent has been  declared.
+%    \item Currently the new method is much more silent: it doesn't warn like
+%     \pkg{hyperref} if it removes commands.
+%   \end{itemize}
+%
+% \section{Package options from hyperref}\label{sec:pkg-options}
+%  The driver will process the package options at the end.
+%  But normally options should better be set with \cs{hypersetup} after
+%  the package has been loaded. This is also the case for options which normally
+%  don't work in \cs{hypersetup}.
+%  One option that currently doesn't work correctly as package option is
+%  |ocgcolorlinks|
+%
+%
+%  Options that still must be set as package options are
+%  \begin{itemize}
+%  \item |backref|
+%  \item |CJKbookmarks| this key should not be used anymore. At some time
+%  it will be removed.
+%  \item |destlabels|    (destination names are taken from \cs{label} if possible)
+%  \item |encap|
+%  \item |hyperfigures|  (according to the \pkg{hyperref} manual
+%  it makes figures hyper links, but actually is a no-op for most drivers, and it
+%  does nothing with this driver either.)
+%  \item |hyperfootnotes|
+%  \item |hyperindex|
+%  \item |implicit|      (redefine \LaTeX\ internals)
+%  \item |nesting| unneeded key, see comment below in \ref{sec:keydesc}. At some time
+%  it will be either removed or extended (if some use can be found).
+%  \item |pagebackref|
+%  \item |pdfpagelabels| (set PDF page labels)
+%  \item |psdextra| this loads some extra definitions used by \cs{pdfstringdef}.
+%  The new driver uses \cs{pdfstringdef} only for the bookmarks, for other strings
+%  it is not relevant.
+%  \end{itemize}
+%
+%  Options that can be without problems set as package options are
+%  \begin{itemize}
+%  \item |debug|, |verbose| (a boolean)
+%  \item |bookmarks| (a boolean)
+%  \item |plainpages|
+%  \item |draft|, |final|
+%  \item |hypertexnames|
+%  \item |naturalnames|
+%  \item |pageanchor|
+%  \end{itemize}
+%
+%  Ignored options:
+%  \begin{itemize}
+%  \item All driver options like |pdftex|, |dvipdfmx|, \ldots
+%  \item |raiselinks| (only used in the dviwind, textures and tex4ht driver anyway)
+%  \item |frenchlinks|
+%  \item |setpagesize|
+%  \item |addtopdfcreator|
+%  \end{itemize}
+%
+%  \section{Disabling links}
+%
+%  \pkg{hyperref} knows like many packages the options |draft| and |final|.
+%  With \pkg{hyperref} they can be used as package options or in the preamble
+%  in \cs{hypersetup} and disable links and anchors completely.
+%  The new driver passes the options also to the \pkg{bookmark} package if
+%  \pkg{bookmark} hasn't been loaded yet as bookmarks can't work properly if
+%  the anchors from hyperref are missing.
+%
+%  \DescribeHypkey{link}%
+%  \DescribeHypkey{url}%
+%  \DescribeHypkey{file}%
+%  \DescribeHypkey{run}%
+%  \DescribeHypkey{menu}%
+%  The |draft| option is a global option that can't be undone (at least not easily).
+%  So the new driver offers also boolean keys |link|, |url|, |file|, |run| and |menu|
+%  which allow to locally disable a link type. So e.g.
+%  |\hypersetup{link=false}\ref{abc}| will give a reference without link (this
+%  is naturally also possible with |\ref*{abc}|). This disables also all hooks of
+%  the link type, so the link is for example no longer colored. It also removes the
+%  implicit grouping of the content.
+%
+%
+%  \section{Draftmode}
+%  pdftex and other engines knows a
+%  draftmode which can be set with |\pdfdraftmode=1|
+%  and \pkg{hyperref} honors this in some places. The new
+%  driver ignores it, for example |pagelabels| are created in any case.
+%  With today's computer power there is not much to gain and it only complicates
+%  the code.
+%
+%  This should not be confused with the |draft| and |final| package options! They
+%  are still honored.
+%
+%  \section{Dropped options}
+%  A number of options are ignored by this driver
+%  \begin{description}
+%  \item[pdfversion] The pdfversion should be set in \cs{DeclareDocumentMetadata}
+%  \item[setpagesize] The key is ignored and the PDF page size is not
+%  set. Load \pkg{color} or \pkg{graphicx} or use a class which sets the PDF page size.
+%  \item[breaklinks] The option does nothing sensible anyway (apart from triggering
+%  a warning). Currently with latex+dvips links can't be broken. But there is work
+%  in progress to change this.
+%  \item[unicode] This is always true.
+%  \item[pdfa] If this option is set to true \pkg{hyperref} normally checks and sets
+%  a small number of requirements for the PDF standard PDF/A.
+%  The key is ignored with this driver. Instead the wanted standard should be declared
+%  in \cs{DeclareDocumentMetadata}:
+%  \begin{verbatim}
+%  \DeclareDocumentMetadata{standard=A-2b}
+%  \end{verbatim}
+%  Currently |A-1b|, |A-2b|, |A-3b| can be set.
+%  The support for various requirements is still incomplete, but the parts that
+%  \pkg{hyperref} checked are implemented:
+%  \begin{itemize}
+%  \item The |/F| key is added to links and |Print| is activated, |Hidden|, |Invisible|,
+%   |NoView| are deactivated.
+%  \item |/NeedAppearances| is suppressed
+%  \item  Pushbuttons, which use the action |/S/JavaScript| are suppressed.
+%  \item  Resetbuttons, which use the action |/S/ResetForm| are suppressed.
+%  \item  In widget annotations, the /AA dictionary is suppressed.
+%  \end{itemize}
+%  \end{description}
+%  \section{Destinations}
+%  Destinations (sometimes call anchors in the \pkg{hyperref} documentation)
+%  are the places a link jumped too. Unlike the name may suggest they don't described
+%  an exact location in the PDF. Instead a destination contains a reference to
+%  a page along with an instruction how to display this page.
+%  The normally used \enquote{XYZ \textit{top left zoom}} for example instructs
+%  the viewer to show the page with the given \textit{zoom} and
+%  the top left corner at the \textit{top left} coordinates---which then gives
+%  the impression that there is an anchor at this position.
+%
+%  From these instructions two (|Fit| and |FitB|) don't take an argument.
+%  All  others take one (|FitH|, |FitV|, |FitBH|, |FitBV|)
+%  or more (|XYZ|, |FitR|) arguments. These arguments are normally
+%  coordinates, |XYZ| takes also a zoom factor. The coordinates are
+%  absolute coordinates in |bp| relative to the lower left corner
+%  of the PDF.
+%
+%  With the primitive command \cs{pdfdest} of pdftex almost all instructions are created
+%  with a keyword only: The needed coordinate is calculated automatically from the location
+%  the \cs{pdfdest} command is issued. So to get a specific coordinate one has to
+%  move the command to the right place. E.g.
+%  \begin{verbatim}
+%  \AddToHookNext{shipout/background}
+%     {\put(0,-\pdfpageheight+100bp){\pdfdest name{destA} FitH\relax}}
+%  \end{verbatim}
+%
+%  Exceptions are the |XYZ| instruction, where pdftex accepts a keyword
+%  |zoom| followed by a zoom factor, and the |FitR| instruction
+%  which understands the keywords |width|, |height| and |depth|
+%  followed by a dimension, which is then used to calculate a rectangle relative to the
+%  current location. If no keywords are given the dimensions are taken from the surrounding
+%  box---which can also lead to zero sized areas.
+%
+%  The manual of \pkg{hyperref} gives a bit the impression as if this
+%  coordinates can be set manually by the user but as described above this is
+%  mostly wrong: It is for normal destination only possible with a dvi-backend like
+%  dvips which make use of |pdfmark.def|. pdftex and luatex can use manual coordinates
+%  only for |pdfstartview| and |pdfremotestartview|.
+%  As dvips was the first driver of \pkg{hyperref} the option |pdfview| was at first
+%  developed for it and then adapted to pdftex. But this had the effect that the handling
+%  of the option |pdfview| is inconsequent across the backend and engines:
+%  For example with |pdfview=FitH 100| pdftex ignores the
+%  number and calculates its own, while dvips sets the coordinate to the absolute
+%  100. The zoom factor of |XYZ| is not supported by the pdftex driver at all, and
+%  |FitR| only partially.
+%
+%  The generic driver consolidate this but tries to stay compatible with the other
+%  drivers as far as possible.
+%  It also takes into account that |pdfview| and |pdfstartview| and |pdfremotestartview|
+%  have different requirements: While for the first relative coordinates are fine,
+%  for the two others absolute coordinates are more sensible.
+%
+%  \DescribeHypkey{pdfview}
+%  \DescribeHypkey{pdfstartview}
+%  \DescribeHypkey{pdfremotestartview}
+%  So with this driver the options
+%  |pdfview|, |pdfstartview| and |pdfremotestartview| take
+%  the following options:
+%  \begin{itemize}
+%  \item |Fit|, |FitB|, |FitH|, |FitV|,
+%   |FitBH|, |FitBV| which can be followed by a positive integer (separated by a space) or the
+%   keyword |null|.
+%   The number can be gives as a \meta{dimension expression} surrounded with
+%   \cs{hypercalcbp}. The driver redefines this command to use
+%   \cs{dim_to_decimal_in_bp:n}.
+%   \begin{itemize}
+%   \item |pdfview| will ignore the integer and any other arguments and calculate
+%   the expected coordinates as described above for pdftex with all
+%   supported engines and backends.
+%   \item |pdfstartview| and |pdfremotestartview| will pass the optional
+%   number or keyword after expansion as absolute coordinate. Missing numbers will
+%   be filled up with |null|.
+%   \end{itemize}
+%
+%  \item |XYZ|. This can be followed (separated by spaces) by up to three
+%  positive integers or keywords |null| which are then taken as \textit{top left zoom}
+%  in this order. \textit{zoom} is a factor, so e.g. 0.5 will give a scaling of 50\%.
+%   \begin{itemize}
+%   \item |pdfview| will use the last value as \textit{zoom}, ignore all other values
+%   and calculate  the expected coordinates as described above for pdftex with all
+%   supported engines and backends (this means it is possible to use |XYZ 2| to
+%   set a zoom of 200\%, it is not necessary to fill in dummy values.)
+%   \item |pdfstartview| and |pdfremotestartview| will pass the optional
+%   numbers or keyword after expansion as absolute coordinates and zoom.
+%   Missing numbers will  be filled up with |null|.
+%   \end{itemize}
+%   This new behaviour is in part incompatible with previous handling with the dvips driver.
+%
+%
+%  \item |FitR|.
+%  If no argument (separated by spaces) follows then
+%  |pdfview| will use with pdftex and luatex
+%  the automatic calculation of the coordinates from the encompassing box. With
+%  dvips and (x)dvipdfmx  it will fall back to |Fit|.
+%  |pdfstartview| and |pdfremotestartview| will fallback to |Fit| too.
+%
+%  If arguments (separated by spaces) follow they should be
+%  four numbers  representing \texttt{left bottom right top}.
+%  \begin{itemize}\item
+%  |pdfview| will use the values to calculate coordinates relative to the current
+%  location. So |0 -100 200 400| will give a \enquote{box} of width 200bp,
+%  height 400bp and depth 100dp that the destination should encompass.
+%  Missing numbers will be set to 0. But one should be aware that is it is quite
+%  unpredicable how viewers which support |FitR| handles zero sizes.
+%
+%  \item |pdfstartview| and |pdfremotestartview| will pass
+%  the values as absolute coordinates.
+%  \end{itemize}
+%  \end{itemize}
+%
+%
+%\section{Assorted key descriptions}\label{sec:keydesc}
+%The following gives a few details to some keys that are perhaps not
+%completly described in the manual, or are a bit different in this driver.
+%The list is alphabetic.
+%
+% \DescribeHypkey{bookmarkstype} This key takes as value the extension of a list
+% like |toc| or |lof|. If this list uses \cs{addcontentsline} the content will
+% be added to the bookmarks. The key can be use in \cs{hypersetup} and also in
+% the middle of the document to switch the list.
+%
+% \DescribeHypkey{bordercolormodel} With |bordercolormodel| the colormodel used in the |/C|
+% key of the annotation array and in similar keys is set. It does not affect
+% the text and graphics colors in the page stream.
+% Possible choices are |rgb| (three numbers in the array) and |cmyk| (four numbers).
+% While the PDF reference allows four numbers, PDF readers don't necessarly handle
+% this correctly, so the value can be wrong.
+%
+% \DescribeHypkey{destlabel} This is a boolean key. Currently it must be set
+% as package option. If set to true, the name
+% of a destination is taken from a following \cs{label}, if there is one before
+% the next destination command. This requires two compilations to get
+% the correct coordinates in the destination. In the first compilation
+% the alias name is recorded in the aux-file:
+% \begin{verbatim}
+% \hyper@newdestlabel{section.1.2}{sec:sec2}
+% \end{verbatim}
+% The next compilation can then make use of it.
+% The two-pass could be avoided in the future with a better labeling system,
+% where the name if set earlier.
+%
+% \DescribeHypkey{extension} This key sets an variable that has two purposes:
+% It is used if file name has not extension, and it decides if the annotation
+% is a URI or GoToR annotation. So
+% \begin{verbatim}
+% \hypersetup{extension=dvi}
+% \href{mwe1.pdf}{pdf}
+% \href{mwe2.dvi}{dvi}
+% \href{mwe3}{no ext}
+% \end{verbatim}
+% will create
+% \begin{verbatim}
+% /Subtype/Link/A<</S/URI   /URI(mwe1.pdf)>>
+% /Subtype/Link/A<</S/GoToR /F  (mwe2.dvi)>>
+% /Subtype/Link/A<</S/GoToR /F  (mwe3.dvi)>>
+% \end{verbatim}
+% Typically PDF viewer can handle only GoToR annotions pointing to a PDF.
+% So normally the default value |pdf| of this key should not be changed.
+% \DescribeHypkey{nesting}\label{key:nesting}%
+% This key is useless in PDF context. The boolean is only used in
+% the code for anchors/destination where nesting doesn't make sense.
+% It should not be changed.
+%
+% \DescribeHypkey{pdfborder}\DescribeHypkey{linkborder}\DescribeHypkey{urlborder}
+% \DescribeHypkey{runborder}\DescribeHypkey{menuborder}
+% This key set accept as value three numbers or three numbers and an array describing
+% a dash pattern, examples are |0 0 1| or |0 0 1 [3 2]|.
+% The first two numbers should according to the reference set round
+% corners, but PDF viewer seem to ignore it. The third number is the line width
+% of the border. Settings done with |pdfborderstyle| should take precedence.
+%
+% \DescribeHypkey{pdfborderstyle}\DescribeHypkey{linkborderstyle}
+% \DescribeHypkey{urlborderstyle}\DescribeHypkey{fileborderstyle}
+% \DescribeHypkey{runborderstyle}\DescribeHypkey{menuborderstyle}
+% The value of this key is the content of the |BS| dictionary.
+% As an example |/Type/Border /W 1  /S/U  /D[3 2]|
+%
+% \begin{tabular}{>{\ttfamily} lll}
+% Key & Values & comment / example\\\hline
+% /Type & |/Border| & optional \\
+% /W    & \meta{number} & Width of border line \\
+% /S    & |/S|      & solid (default)\\
+%       & |/D| &dash  pattern can be set with /D\\
+%       & |/B| & beveled\\
+%       & |/I| & inset\\
+%       & |/U| & underline\\
+% /D    & \meta{array of numbers} & dash pattern (lines/gaps) (default [3])
+% \end{tabular}
+%
+% \DescribeHypkey{pdfcreationdate}\DescribeHypkey{pdfmoddate}
+% Setting these keys is normally not needed. If they are used the values
+% are stored directly in the Info dictionary for |/Creationdate| and |/ModDate|.
+% The values are converted to strings but not processed further, so they should
+% have the correct PDF format without the enclosing parentheses,
+% e.g. |D:20200202111111+01'00'|.
+%
+% \DescribeHypkey{pdflinkmargin}As described in the \pkg{hyperref} manual
+% the behaviour differs between the backends: with dvips it is possible to
+% change links locally, pdflatex and lualatex work by page, with dvipdfmx
+% the setting is global (and has to be done in the preamble).
+%
+% \DescribeHypkey{pdflang} The key will work, but it is recommended to the set
+% the language in \cs{DeclareDocumentMetadata} instead.
+%^^A %% This is an adapted version of hluatex.def
+%^^A %% meant to test the use of the commands
+%^^A %% from pdfmanagement.sty
+%^^A %%
+%^^A %% drivers are loaded in line 4745 in hyperref.sty in a \Hy@AtEndOfPackage command.
+%^^A %%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%^^A %% list of new internal commands
+%^^A %% __hyp_link_goto_begin:nw : start command for links to internal destination
+%^^A %%                             replaces \find@pdflink
+%^^A %% __hyp_link_goto_end:
+%^^A %% __hyp_destination:n     :  sets an anchor, replaces \new@pdflink
+%^^A %% \__hyp_PageLabels_gpush: : puts pagelabels in the catalog, used on every storing
+%^^A %% PDF String (text)
+%^^A %% *\@@_text_pdfstring:nnN  : replaces Hy@pstringdef, converts #1 to pdfstring in encoding #2
+%^^A %%                           and stores in N
+%^^A %% Build with:
+%^^A %% *\@@_text_purify:nN
+%^^A %% *\@@_text_cleanup:N
+%^^A %% *\@@_text_convert:nN
+%^^A %%
+%^^A %% Destinations (dest)
+%^^A %% \l_@@_dest_box
+%^^A %%
+%^^A %% References (ref)
+%^^A %% *\@@_ref_label:nn
+%^^A %% *\@@_ref_if_exist:nn
+%^^A %% *\@@_ref_check:nn
+%^^A %% % helps to display key list messages
+%^^A %% \@@_clist_display:n
+%^^A %%
+%^^A %% \__hyp_info_generate_addons: what did this do??
+%^^A %%
+%^^A %% \g__hyp_AcroForm_CoFields_prop
+%^^A %% \g__hyp_AcroForm_Fields_prop
+%^^A %%
+%^^A %%  \g_@@_dest_pdfstartpage_tl ,
+%^^A %%  \g_@@_dest_pdfstartview_tl ,
+%^^A %%  \l_@@_dest_pdfremotestartview_tl ,
+%^^A
+%^^A %% Constants
+%^^A %% *\c_@@_map_annot_hyp_prop
+%^^A %% *\c_@@_dest_undefined_tl
+%^^A %% Temp variables
+%^^A %% \l_@@_tmpa_seq
+%^^A %% \l_@@_tmpa_box
+%^^A %% \l_@@_tmpa_tl
+%^^A %% \l_@@_tmpa_str
+%^^A %% \l_@@_tmpa_int
+%^^A %%
+%^^A %% \l_@@_dest_name_tmpa_tl
+%^^A %% \l_@@_uri_tmpa_tl
+%^^A %% \l_@@_filename_tmpa_tl
+%^^A %% \l_@@_para_tmpa_tl
+%^^A %% \l_@@_text_tmpa_str
+%^^A %% \g_@@_text_tmpa_str
+%^^A %% \l_@@_CheckmarkYes_tl
+%^^A %% \l_@@_CheckmarkOff_tl
+%^^A %% \l_@@_RadioYes_tl
+%^^A %% \g_@@_bordercolormodel_tl
+%
+%^^A %% \l_@@_dest_pdfview_tl
+%^^A %% list of commands which probably will have to change
+% \end{documentation}
+% \begin{implementation}
+%  \part{\pkg{hyperref-generic} driver implementation}
+%    \begin{macrocode}
+%<*package>
+%<@@=hyp>
+%    \end{macrocode}
+%    \begin{macrocode}
+\ProvidesFile{hgeneric-testphase.def}
+  [2021/02/22 v0.95a %
+  generic Hyperref driver for the LaTeX PDF management testphase bundle]
+
+\RequirePackage{etoolbox} %why?
+%    \end{macrocode}
+%    \begin{macrocode}
+\ExplSyntaxOn
+\file_input:n {hyperref-colorschemes.def}
+\ExplSyntaxOff
+%    \end{macrocode}
+%
+%
+% \section{messages}
+%  Redirect the message name:
+%    \begin{macrocode}
+\ExplSyntaxOn
+\prop_gput:Nnn \g_msg_module_name_prop { hyp }{ hyperref }
+%    \end{macrocode}
+% At first a message for the testing of the resource management
+%    \begin{macrocode}
+\msg_new:nnnn
+  { hyp }
+  { missing-resource-management }
+  { The~PDF~resource~management~is~required~for~this~hyperref~driver! }
+  {
+     Activate~it~with \\
+     \tl_to_str:n{\RequirePackage{pdfmanagement-testphase}}\\
+     \tl_to_str:n{\DeclareDocumentMetadata{<options>}}\\
+     before~\tl_to_str:n{\documentclass}
+  }
+%    \end{macrocode}
+% The pdfversion should be set in \cs{DeclareDocumentMetadata}
+%    \begin{macrocode}
+\msg_new:nnnn
+  { hyp }
+  { pdfversion-disabled }
+  {
+    This~hyperref~driver~ignores~the~pdfversion~key!\\
+    Set~the~pdfversion~in~\token_to_str:N \DeclareDocumentMetadata
+  }
+  {
+    For example:\\
+    \tl_to_str:n
+     {
+      \DeclareDocumentMetadata { pdfversion=1.7 }
+     }
+  }
+%    \end{macrocode}
+% A generic message for ignored keys.
+%    \begin{macrocode}
+\msg_new:nnn
+  { hyp }
+  { key-dropped }
+  {
+    This~hyperref~driver~ignores~the~key~#1!\\
+    Please~check~the~documentation.
+  }
+%    \end{macrocode}
+% pdf/A messages for fields, this will probably be moved to an external package
+%    \begin{macrocode}
+\msg_new:nnn
+  { hyp }
+  { pdfa-no-push-button }
+  { PDF/A:~Push~button~with~JavaScript~is~prohibited }
+
+\msg_new:nnn
+  { hyp }
+  { pdfa-no-reset-button }
+  { PDF/A:~Reset~action~is~prohibited }
+%    \end{macrocode}
+% pdf/A message for not allowed Named actions
+%    \begin{macrocode}
+\msg_new:nnn
+  { hyp }
+  { pdfa-no-named-action }
+  { PDF/A:~Named~action~#1~is~prohibited }
+%    \end{macrocode}
+% A message if the destination name is empty.
+%    \begin{macrocode}
+\msg_new:nnn
+  { hyp }
+  { empty-destination-name }
+  {
+    Empty~destination~name,\\
+            using~`#1'
+  }
+%    \end{macrocode}
+% A message if the destination check fails
+%    \begin{macrocode}
+\msg_new:nnn
+  { hyp }
+  { invalid-destination-value }
+  {
+    Invalid~value~`#1'~of~`#2'  \\
+    is~replaced~by~`Fit'~\msg_line_context:.
+  }
+%    \end{macrocode}
+% Some options or values should not be used in older pdf versions
+%    \begin{macrocode}
+\msg_new:nnn
+  { hyp }
+  { ignore-deprecated-or-unknown-option-in-pdf-version }
+  {
+    Option~`#1'~is~unknown~or~deprecated~in\\
+    pdf~version~#2.~Ignored.
+  }
+\msg_new:nnn
+  { hyp }
+  { ignore-deprecated-or-unknown-value-in-pdf-version }
+  {
+    Value~`#1'~is~unknown~or~deprecated~in\\
+    pdf~version~#2.~Ignored.
+  }
+\msg_new:nnn
+  { hyp }
+  { replace-deprecated-or-unknown-value-in-pdf-version }
+  {
+    Value~`#1'~is~unknown~or~deprecated~in\\
+    pdf~version~#2. Value~`#3'~is used instead.
+  }
+%    \end{macrocode}
+% During development not all standard hyperref keys are known and the
+% Hyp-handler needs to process some new keys unknown to him.
+% This issues warnings for now:
+%    \begin{macrocode}
+\msg_new:nnn
+  { hyp }
+  { unknown-key }
+  {
+    unknown~key~#2~of~module~’#1’~set~to~’#3’.
+  }
+\msg_new:nnn
+  { hyp }
+  { unknown-key-to-Hyp }
+  {
+    ignored~in~family~Hyp~unknown~key~#1.
+  }
+%    \end{macrocode}
+% There are a lot choice keys. This defines messages which shows the valid
+% choices if a faulty one has been used:
+%    \begin{macrocode}
+\cs_new:Npn \@@_clist_display:n #1 {*~#1\\}
+\msg_new:nnn
+  { hyp }
+  { unknown-choice }
+  {
+    Value~'#3'~is~invalid~for~key~'#1'.\\
+    The~key~accepts~only~the~choices\\
+    \clist_map_function:nN { #2 }\@@_clist_display:n
+  }
+
+\msg_new:nnn
+  { hyp }
+  { unknown-choice+empty }
+  {
+    Value~'#3'~is~invalid~for~key~'#1'.\\
+    The~key~accepts~only~the~choices\\
+    \clist_map_function:nN { #2 }\@@_clist_display:n
+    An~empty~value~removes~the~setting.
+  }
+
+\msg_new:nnn
+  { hyp }
+  { no-bool }
+  {
+    Value~'#2'~is~invalid~for~key~'#1'.\\
+    The~key~accepts~only~the~choices\\
+    *~true\\
+    *~false \\
+    *~and~an~empty~value~which~removes~the~setting.\\
+    No~value~is~equivalent~to~using~`true`.
+  }
+%    \end{macrocode}
+% \section{Variants}
+%    \begin{macrocode}
+\cs_generate_variant:Nn\pdf_destination:nn {nf}
+%    \end{macrocode}
+% \section{Overwriting/providing commands from hyperref}
+%  hyperref checks driver version, we need to suppress this during the development
+%    \begin{macrocode}
+\chardef\Hy@VersionChecked=1 %don't check the version!
+%    \end{macrocode}
+%    \begin{macrocode}
+%\cs_set_protected:Npn \PDF@SetupDoc{}
+%\\PDF@FinishDoc{}% dummy needed for hyperref ...
+%    \end{macrocode}
+% \begin{macro}[EXP]{\hypercalcbp}
+% We define a better (expandable) version of \cs{hypercalcbp}
+%    \begin{macrocode}
+\cs_set_eq:NN \hypercalcbp \dim_to_decimal_in_bp:n
+%    \end{macrocode}
+% \end{macro}
+%
+% This command must be provided for now, but they are unused by the driver:
+%    \begin{macrocode}
+\providecommand\@pdfborder{}
+\providecommand\@pdfborderstyle{}
+\newcommand\OBJ@OCG@view {} % needed in hyperref
+\def\Hy@numberline#1{#1\c_space_tl}   %needed by bookmark
+%    \end{macrocode}
+%
+% We force unicode as option. As bookmarks are still using \cs{pdfstringdef}
+% we also need to load puenc.def.
+%    \begin{macrocode}
+\HyPsd@LoadUnicode
+\Hy@unicodetrue
+\let\HyPsd@pdfencoding\HyPsd@pdfencoding@unicode
+\Hy@DisableOption{unicode}
+%    \end{macrocode}
+% The pdfversion should be set in \cs{DeclareDocumentMetadata} but we must
+% copy it to the \pkg{hyperref} command:
+%    \begin{macrocode}
+\cs_set_eq:NN \Hy@pdfminorversion \pdf_version_minor:
+\cs_set_eq:NN \Hy@pdfmajorversion \pdf_version_major:
+%    \end{macrocode}
+%    \begin{macrocode}
+\legacy_if:nT { Hy@setpdfversion }
+ {
+    \msg_warning:nn { hyp }{ pdfversion-disabled }
+ }
+\Hy@DisableOption{pdfversion}
+%    \end{macrocode}
+% \cs{Acrobatmenu} should use the new internal link command
+%    \begin{macrocode}
+\RenewDocumentCommand \Acrobatmenu { m m }
+  {
+    \hyper@linknamed {#1} {#2}
+  }
+%    \end{macrocode}
+%
+% \cs{hypersetup} should set the new keys.
+% We can't also execute |\kvsetkeys{Hyp}| as this errors for example with colors.
+% This means the driver has to provide new code for every key!
+%
+%    \begin{macrocode}
+%  TODO should go at some time ...
+% \kv@set@family@handler{Hyp}
+%  { \msg_warning:nnx {hyp}{unknown-key-to-Hyp}{#1} }
+\cs_set_protected:Npn \hypersetup #1
+  {
+     %\kvsetkeys{Hyp} {#1}
+     \keys_set:nn { hyp / setup }{ #1 }
+  }
+% TODO for now unknown keys should only give warnings.
+\keys_define:nn { hyp / setup }
+  {
+    unknown .code:n =
+    {
+      \msg_warning:nnxxx { hyp } { unknown-key }
+      { hyp~/~setup }{ \l_keys_key_str } { #1 }
+    }
+  }
+%    \end{macrocode}
+%
+% \section{Compability commands}
+% \subsection{Metadata}
+% A number of values should be accessible from other packages. Until now
+% packages like \pkg{hyperxmp} used variables like \cs{@pdfauthor}. As they are
+% gone we need to provide some other access.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_store_metadata:nn #1 #2 %#1 key, #2 value.
+  {
+    %\tl_set:cn {@#1}{#2}
+    \AddToDocumentProperties[hyperref]{#1}{#2}
+  }
+\cs_generate_variant:Nn \@@_store_metadata:nn {xn,nx,xx}
+%    \end{macrocode}
+% \subsection{citecolor}
+% cite is a link context. So we define a hook, and the keys in terms of this hook.
+%
+%    \begin{macrocode}
+\hook_new:n{hyp/link/cite}
+\color_set:nnn {hyp/color/cite}{HTML}{2E7E2A}
+\color_set:nn  {hyp/color/citeborder}{hyp/color/cite!60!white}
+\keys_define:nn { hyp / setup }
+  {
+    ,citecolor .code:n = {\@@_color_set:nn {hyp/color/cite}{#1}}
+    ,citebordercolor
+      .code:n = {\@@_color_set:nn {hyp/color/citeborder}{#1}}
+  }
+\hook_gput_code:nnn { hyp/link/cite }{hyp/cite}
+  {
+    \keys_set:nn { hyp / setup }
+      {
+        ,linkbordercolor= hyp/color/citeborder
+        ,linkcolor      = hyp/color/cite
+      }
+  }
+%    \end{macrocode}
+% \section{Checks}
+% The driver can not work properly if the pdfmanagement is not active,
+% as keys need to write to the catalog and to info. But annotations
+% and outlines should work.
+% So should this be a fatal error?
+% Should there be a difference between missing and inactive management?
+% TODO
+%    \begin{macrocode}
+\bool_lazy_and:nnF
+  { \cs_if_exist_p:N \pdfmanagement_if_active_p: }{ \pdfmanagement_if_active_p: }
+  { \msg_error:nn { hyp}{ missing-resource-management } }
+%    \end{macrocode}
+% Outlines/bookmarks require the bookmark package.
+% TODO check pdfpagemode if booksmarks are suppressed.
+%    \begin{macrocode}
+\legacy_if:nT { Hy@bookmarks }
+  {
+    \AddToHook{begindocument/before}[hyperref/bookmark]{\RequirePackage{bookmark}}
+  }
+\legacy_if:nT {Hy@draft}
+  {
+    \PassOptionsToPackage{draft}{bookmark}
+  }
+%    \end{macrocode}
+%
+% \section{Reference and label commands}
+% The code uses the l3ref-tmp package which
+% must have been loaded as pdfmanagement is a requirement.
+% The commands use after the module prefix always |_ref|.
+%
+% At first a label command which add the space commands from LaTeX:
+% \begin{macro}
+%  {
+%    \@@_ref_label:nn,
+%    \@@_ref_if_exist:nn,
+%    \@@_ref_check:nn,
+%    \@@_ref_value:nn
+%  }
+%    \begin{macrocode}
+%
+\cs_new_protected:Npn \@@_ref_label:nn #1 #2 %label/attributes
+  {
+    \@bsphack
+      \ref_label:nn{#1}{#2}
+    \@esphack
+  }
+\cs_generate_variant:Nn \@@_ref_label:nn {en}
+%    \end{macrocode}
+% This provides a condition which tests if a label/attribute combination is known
+%   \begin{macrocode}
+\prg_new_eq_conditional:NNn \@@_ref_if_exist:nn \ref_if_exist:nn { p , T , F,  TF }
+\prg_generate_conditional_variant:Nnn \@@_ref_if_exist:nn  {en}  { p , T , F, TF }
+%    \end{macrocode}
+% This checks if the label/attribute is known and issues a warning if not.
+% It then also triggers the standard rerun message.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_ref_check:nn #1 #2 %label/attribute
+  {
+    \@@_ref_if_exist:nnF {#1}{#2}
+      {
+        \protect\G@refundefinedtrue
+        \@latex@warning
+          {
+            Reference~`\tl_to_str:n {#1}'~with~attribute~`\tl_to_str:n {#2}'~
+            on~page~\thepage~\space undefined
+          }
+      }
+  }
+\cs_generate_variant:Nn \@@_ref_check:nn {en}
+%    \end{macrocode}
+% This retrieves a value, it is a simple wrapper around the \cs{ref_value:nn}
+%    \begin{macrocode}
+\cs_new:Npn \@@_ref_value:nn #1 #2
+  {
+    \ref_value:nn{#1}{#2}
+  }
+\cs_generate_variant:Nn \@@_ref_value:nn {en}
+%    \end{macrocode}
+% \end{macro}
+% \section{Variables}
+% \subsection{Private temporary variables}
+% At first a few generic tmp variables
+% \begin{variable}
+%  {
+%    \l_@@_tmpa_tl,
+%    \l_@@_tmpa_seq,
+%    \l_@@_tmpa_int,
+%    \l_@@_tmpa_box,
+%    \l_@@_tmpa_str,
+%  }
+%    \begin{macrocode}
+\box_new:N \l_@@_tmpa_box
+\tl_new:N  \l_@@_tmpa_tl
+\seq_new:N \l_@@_tmpa_seq
+\int_new:N \l_@@_tmpa_int
+\str_new:N \l_@@_tmpa_str
+%    \end{macrocode}
+% \end{variable}
+%
+% A number of more specific tmp variables. These will perhaps disappear or change.
+% \begin{variable}
+%  {
+%   \l_@@_dest_name_tmpa_tl,
+%   \l_@@_uri_tmpa_tl,
+%   \l_@@_filename_tmpa_tl,
+%   \l_@@_para_tmpa_tl
+%   \l_@@_text_tmpa_str
+%   \g_@@_text_tmpa_str
+%  }
+% TODO: document and check use!
+%    \begin{macrocode}
+\tl_new:N  \l_@@_dest_name_tmpa_tl
+\tl_new:N  \l_@@_uri_tmpa_tl
+\tl_new:N  \l_@@_filename_tmpa_tl
+\tl_new:N  \l_@@_para_tmpa_tl
+\str_new:N \l_@@_text_tmpa_str
+\str_new:N \g_@@_text_tmpa_str
+%    \end{macrocode}
+% \end{variable}
+%
+% \subsection{Constants}
+% \begin{variable}
+%   { \c_@@_dest_undefined_tl }
+%  This variable is used if a destination name is empty.
+%    \begin{macrocode}
+\tl_const:Nn \c_@@_dest_undefined_tl {UNDEFINED}
+%    \end{macrocode}
+% \end{variable}
+% \begin{variable}
+%   {
+%     \c_@@_annot_types_seq,
+%     \c_@@_map_annot_hyp_prop,
+%     \c_@@_map_hyp_annot_prop,
+%   }
+%  This constants holds the link types managed by hyperref
+%  along with a mapping from annot names to hyperref names and back.
+%    \begin{macrocode}
+\seq_const_from_clist:Nn \c_@@_annot_types_seq
+ {url,link,file,menu,run}
+\prop_const_from_keyval:Nn \c_@@_map_annot_hyp_prop
+  {
+    URI   = url,
+    GoTo  = link,
+    GoToR = file,
+    Named = menu,
+    Launch= run
+  }
+\prop_const_from_keyval:Nn \c_@@_map_hyp_annot_prop
+  {
+    url   = URI,
+    link  = GoTo,
+    file  = GoToR,
+    menu  = Named,
+    run   = Launch
+  }
+
+%    \end{macrocode}
+% \end{variable}
+% \subsection{Variables}
+% \begin{variable}
+%   {
+%     \g_@@_dest_pdfstartpage_tl ,
+%     \g_@@_dest_pdfstartview_tl ,
+%     \l_@@_dest_pdfremotestartview_tl ,
+%   }
+%   The first holds the (absolute) start page number,
+%   the other the startview instruction for the current and remote files.
+%   The instruction is in \enquote{PDF format} but without the leading slash!
+%    \begin{macrocode}
+\tl_new:N  \g_@@_dest_pdfstartpage_tl
+\tl_new:N  \g_@@_dest_pdfstartview_tl
+\tl_new:N  \l_@@_dest_pdfremotestartview_tl
+%    \end{macrocode}
+% \end{variable}
+%
+% It is still unclear which str convert option is the best in the various
+% places, so we use a variable to allow tests and perhaps external configuration.
+% The \enquote{print} type should always have the delimiters.
+% \begin{variable}
+%   {
+%     \l_@@_text_enc_uri_print_tl,
+%     \l_@@_text_enc_info_print_tl,
+%     \l_@@_text_enc_dest_tl,
+%     \l_@@_text_enc_dest_print_tl,
+%     \l_@@_text_enc_file_print_tl,
+%     \l_@@_text_enc_para_print_tl
+%   }
+%    \begin{macrocode}
+\tl_new:N  \l_@@_text_enc_uri_print_tl
+\tl_new:N  \l_@@_text_enc_info_print_tl
+\tl_new:N  \l_@@_text_enc_dest_tl
+\tl_new:N  \l_@@_text_enc_dest_print_tl
+\tl_new:N  \l_@@_text_enc_file_print_tl
+\tl_new:N  \l_@@_text_enc_para_print_tl
+
+\tl_set:Nn \l_@@_text_enc_uri_print_tl  {utf8/URI}
+\tl_set:Nn \l_@@_text_enc_info_print_tl {utf16/hex}
+\tl_set:Nn \l_@@_text_enc_dest_tl       {utf8/string-raw}
+\tl_set:Nn \l_@@_text_enc_dest_print_tl {utf8/string}
+\tl_set:Nn \l_@@_text_enc_file_print_tl {utf8/string}
+\tl_set:Nn \l_@@_text_enc_para_print_tl {utf8/string}
+%    \end{macrocode}
+% \end{variable}
+% \begin{variable}{\l_@@_dest_pdfview_tl}
+% This hold the destination instructions in a format suitable for
+% \cs{pdf_destination:nn}. The special value |fitrbox| indicates a boxed destination.
+%    \begin{macrocode}
+\tl_new:N  \l_@@_dest_pdfview_tl
+%    \end{macrocode}
+% \end{variable}
+% \begin{hypcolor}
+%   {
+%     hyp/annot/link,
+%     hyp/annot/url,
+%     hyp/annot/file,
+%     hyp/annot/run,
+%     hyp/annot/menu,
+%   }
+% These color names are used for the annotations (colorlinks). They are initialized
+% at the end when the color scheme is used
+% \end{hypcolor}
+% \begin{variable}{\g_@@_bordercolormodel_str}
+% This holds the export model for border color etc.
+% It is currently either |space-sep-cmyk| or |space-sep-rgb|.
+% The default is the second. It can be change by the key |bordercolormodel|
+%    \begin{macrocode}
+\str_new:N \g_@@_bordercolormodel_str
+%    \end{macrocode}
+% \end{variable}
+% \subsection{Booleans}
+% \begin{variable}
+%   {
+%     \l_hyp_annot_colorlink_bool,
+%     \l_hyp_annot_colorurl_bool,
+%     \l_hyp_annot_colorfile_bool,
+%     \l_hyp_annot_colorrun_bool,
+%     \l_hyp_annot_colormenu_bool,
+%   }
+%  These booleans are needed to control the colors.
+%  They are public so that other packages can query the state too.
+%    \begin{macrocode}
+\seq_map_inline:Nn \c_@@_annot_types_seq
+  {
+    \bool_new:c {l_hyp_annot_color#1_bool}
+  }
+%    \end{macrocode}
+% \end{variable}
+% \begin{variable}
+%   {
+%     \l_hyp_annot_ocgcolorlink_bool,
+%     \l_hyp_annot_ocgcolorurl_bool,
+%     \l_hyp_annot_ocgcolorfile_bool,
+%     \l_hyp_annot_ocgcolorrun_bool,
+%     \l_hyp_annot_ocgcolormenu_bool,
+%   }
+%  These booleans are needed to control the ocgcolors.
+%  They are public so that other packages can query the state too.
+%    \begin{macrocode}
+\seq_map_inline:Nn \c_@@_annot_types_seq
+  {
+    \bool_new:c {l_hyp_annot_ocgcolor#1_bool}
+  }
+%    \end{macrocode}
+% \end{variable}
+% \begin{variable}
+%  {
+%    \l_@@_annot_GoTo_bool
+%    \l_@@_annot_URI_bool
+%    \l_@@_annot_GoToR_bool
+%    \l_@@_annot_Named_bool
+%    \l_@@_annot_Launch_bool
+%  }
+%  This booleans are used to disable some link types
+%  while keeping others.
+%    \begin{macrocode}
+\seq_map_inline:Nn \c_pdfannot_link_types_seq
+  {
+    \bool_new:c {l_@@_annot_#1_bool}
+    \bool_set_true:c {l_@@_annot_#1_bool}
+  }
+%    \end{macrocode}
+% \end{variable}
+%
+% \subsection{Boxes}
+% \begin{variable}{\l_@@_dest_box}
+% This holds an (empty) box which is used to get the width for FitR destinations.
+%    \begin{macrocode}
+\box_new:N  \l_@@_dest_box
+%    \end{macrocode}
+% \end{variable}
+
+% \subsection{Regex}
+% \begin{variable}{\c_@@_dest_startview_regex}
+% This regex is used to extract the right arguments
+% pdfstartview and pdfremotestartview. Their values is filled up with |null|
+% and then the start extracted.
+%    \begin{macrocode}
+\regex_const:Nn \c_@@_dest_startview_regex
+  {
+    \A\ *
+     (?:
+      (?:XYZ (?:\ +(?:(?:\d+|\d*\.\d+)|null)){3}\ )
+      |
+      (?:Fit\b|FitB\b)
+      |
+      (?:(?:FitH|FitV|FitBH|FitBV)(?:\ +(?:\d+|\d*\.\d+)|\ +null){1})
+      |
+      (?:FitR (?:\ +\d+|\ +\d*\.\d+){4}\ )
+     )
+  }
+%    \end{macrocode}
+% \end{variable}
+%
+% \subsection{PDF dictionaries}
+% \begin{variable}{l_@@_page/Trans}
+% This dictionary is used for page transitions.
+%    \begin{macrocode}
+\pdfdict_new:n   {l_@@_page/Trans}
+\pdfdict_put:nnn {l_@@_page/Trans}{Type}{/Trans}
+%    \end{macrocode}
+% \end{variable}
+
+% \section{PDF string conversion}
+%
+% This defines a command which is used to replace
+% \cs{pdfstringdef}. This is probably temporary and will be adjusted or
+% replaced if some more generic PDF string command/module exists.
+% All commands here use the \enquote{submodule} name \texttt{text}.
+% At first a hook for user additions:
+% \begin{macro}{hyp/text/pdfstring}
+%    \begin{macrocode}
+\hook_new:n {hyp/text/pdfstring}
+%    \end{macrocode}
+% \end{macro}
+% The first step to convert input in a PDF string is to purify it, that means
+% to remove/expand commands. As the whole process is not expandable anyway we
+% can use a protected command. The \enquote{output} is a string:
+% \begin{macro}{\@@_text_purify:nN}
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_text_purify:nN #1 #2 %#1 input, #2  str command
+  {
+     \str_set:Nx #2 {\text_purify:n { #1 } }
+  }
+%    \end{macrocode}
+% \end{macro}
+% The second step is to cleanup the output of the first step. This is a dummy
+% currently. The argument should be a string variable.
+% \begin{macro}{\@@_text_cleanup:N}
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_text_cleanup:N #1
+ {
+
+ }
+%    \end{macrocode}
+% \end{macro}
+% The last step converts the string to a PDF encoding. As we have at least two
+% targets (hex and literal) there is an argument. The conversion assumes
+% utf8 input, it is based on cs{pdf_string_from_unicode:nnN} in l3pdftools.
+%
+% \#2 is str variable,
+% \#1 should be one of
+%
+% \begin{tabular}{ll}
+%  utf8/string         & \texttt{(lit)} (utf8/string)\\
+%  utf8/string-raw     & \texttt{lit}   (utf8/string)\\
+%  utf8/URI            & \texttt{(percent encoded url)}\\
+%  utf8/URI-raw         & \texttt{percent encoded url}\\
+%  utf16/hex            & \texttt{<HEX>} (utf16/hex)\\
+%  utf16/hex-raw           & \texttt{HEX}   (utf16/hex)\\
+%  utf16/string        & \texttt{(lit)} (utf16/string)\\
+%  utf16/string-raw    & \texttt{lit}   (utf16/string)
+%  \end{tabular}
+%  \begin{macro}{ \@@_text_string_from_unicode:nN }
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_text_string_from_unicode:nN #1 #2
+  {
+     \pdf_string_from_unicode:nVN { #1 } #2 #2
+  }
+%    \end{macrocode}
+% \end{macro}
+% This command combines everything.
+% |#1|=input, |#2|= handler shortcut |#3|= output str variable
+% The commands uses a group to locally set \cs{Hy@pdfstringtrue}
+% so that \cs{texorpdfstring} works and other local settings can be done.
+%
+% \begin{macro}{ \@@_text_pdfstring:nnN }
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_text_pdfstring:nnN #1 #2 #3
+  {
+    \group_begin:
+    \Hy@pdfstringtrue
+    \hook_use:n {hyp/text/pdfstring}
+    \@@_text_purify:nN  { #1 } \l_@@_text_tmpa_str
+    \@@_text_cleanup:N         \l_@@_text_tmpa_str
+    \@@_text_string_from_unicode:nN { #2 } \l_@@_text_tmpa_str
+    \str_gset_eq:NN \g_@@_text_tmpa_str\l_@@_text_tmpa_str
+    \group_end:
+    \str_set_eq:NN #3 \g_@@_text_tmpa_str
+ }
+\cs_generate_variant:Nn \@@_text_pdfstring:nnN {xnN,onN,xoN,ooN,noN}
+%    \end{macrocode}
+% \end{macro}
+% !!! temporary until all instances are gone
+%^^A TODO check if the redefinition of |~| is needed (probably not)
+%^^A \edef~{\string~}%
+%^^A  \char_set_catcode_other:N \~
+%^^A  \char_set_active_eq:NN \~ \c_tilde_str
+%^^A  \char_set_catcode_active:N \~
+%    \begin{macrocode}
+\cs_new_protected:Npn\Hy@pstringdef #1 #2
+  { \@@_text_pdfstring:xnN {#2} {utf8/string-raw}#1 }
+%    \end{macrocode}
+%
+% This is a special version for info keys:
+% \begin{macro}{ \@@_text_pdfstring_info:nN }
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_text_pdfstring_info:nN #1 #2
+  {
+    \@@_text_pdfstring:noN  { #1 }{ \l_@@_text_enc_info_print_tl } #2
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+% \section{Pagelabels}
+% Page labels are representations of the page numbers in the PDF viewer. If the hyperref
+% options |pdfpagelabels| is true (the default) roman numbers are e.g. shown as
+% \enquote{ii (2/58)}. To do this the page ranges must be collected, if possible a prefix
+% and the numbering of the counter must be identified and then written
+% to the catalog.
+%
+% The current implementation in hyperref/hyperref drivers:
+% \begin{description}
+% \item[xetex:] hxetex.def, line 80-110\\
+%        |\HyPL@StorePageLabel| writes to the aux-file
+%        at begin document (after reading the aux)
+%        |\HyPL@SetPageLabels| is called (defined in hyperref.sty after the driver
+%        loading)
+%        which calls |\Hy@PutCatalog{/PageLabels<</Nums[\HyPL@Labels]>>}|
+% \item[dvips:]  identical to xetex, line 60 to 90 in pdfmark.def
+% \item[dvipdfm:] identical to xetex
+% \item[pdftex:] |\HyPL@StorePageLabel| stores in |\HyPL@Labels| in the first compilation
+% In |\AtVeryEndDocument|  |\HyPL@SetPageLabels| is called.
+% \item[luatex] identical to pdftex
+% \end{description}
+%
+% The code in \pkg{hyperref} inspects |\thepage| and tries to figure out
+% the numbering system and the prefix. E.g. A-\arabic{page} is correctly split.
+% If the counter can not be identified \pkg{hyperref} generates only /P entries with the
+% whole content.
+%
+% The new implementation makes use of the pdf management: The relevant entry in the
+% catalog is continuously updated and pushed out at the end of the document.
+% This works (hopefully \ldots) with all drivers.
+%
+% We do not try to avoid the (in hyperref's wording)
+% \enquote{useless} pagelabel entry
+% |/PageLabels <</Nums[0<</S/D>>]>>|
+% (but it would be possible), we also don't test for empty |\thepage|,
+% \pkg{hyperref} seems to handle this fine and the pdf is valid.
+%
+% The code has to define |\Hy@PutCatalog| as we can't yet
+% change code in hyperref. The switch for draftmode has been removed.
+%
+% \begin{macro}
+%   {
+%     \@@_PageLabels_gpush:,
+%     \Hy@PutCatalog,
+%     \HyPL@StorePageLabel
+%   }
+%    \begin{macrocode}
+\cs_new_protected:Npn\@@_PageLabels_gpush:
+  {
+    \pdfmanagement_add:nnx {Catalog} {PageLabels}{<</Nums[\HyPL@Labels]>>}
+  }
+
+\def\Hy@PutCatalog #1 {}
+
+
+\legacy_if:nT { Hy@pdfpagelabels }
+  {
+    \cs_set_protected:Npn \HyPL@StorePageLabel #1
+      {
+        \tl_gput_right:Nx \HyPL@Labels { \the\Hy@abspage<<#1>> }
+        \@@_PageLabels_gpush:
+      }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \section {Core Hyperref Commands}
+% Every hyperref has to define eight core command:
+% \begin{verbatim}
+% \hyper@anchor
+% \hyper@anchorstart
+% \hyper@anchorend
+% \hyper@link      %GoTo
+% \hyper@linkstart %GoTo
+% \hyper@linkend   %GoTo
+% \hyper@linkfile  %GoToR
+% \hyper@linkurl   %URI
+% \end{verbatim}
+%
+% This driver defines for consistency also
+% |\hyper@linklaunch| for Launch and |\hyper@linknamed| for Named.
+%
+% \subsection{ Anchors / destinations}
+% The first three commands are needed for \enquote{anchors}. At first
+% the internal commands to create a destination. It uses
+% |\Hy@WrapperDef| to make it babel safe, it is not clear if this is
+% still needed, but we leave if for now.
+% \begin{function} { \@@_destination:nn }
+% \begin{syntax}
+%  \cs{@@_destination:nn} \Arg{destination name} \Arg{location}
+%  \end{syntax}
+%  The \meta{destination name} is encoded with the method stored in
+%  in \cs{l_@@_text_enc_dest_tl}. The location should be one of
+%  |fit|, |fith|, |fitv|, |fitbv|, |fitbh|, |fitr|, |xyz|, |fitrbx|.
+%  The last will make use of \cs{l_@@_dest_box}
+% \end{function}
+% \begin{macro}{ \@@_destination:nn }
+%    \begin{macrocode}
+\Hy@WrapperDef \@@_destination:nn #1 #2
+  {
+    \mode_if_horizontal:T { \@savsf\spacefactor }
+    \Hy@SaveLastskip      %defined in hyperref
+    \Hy@VerboseAnchor{#1} %defined in hyperref, for debugging
+    \@@_text_pdfstring:xoN
+      { \HyperDestNameFilter{#1}  }
+      { \l_@@_text_enc_dest_tl }
+      \l_@@_tmpa_tl
+    \str_if_eq:nnTF  {#2} {fitrbox}
+      {
+        \exp_args:NV
+        \pdf_destination:nnnn \l_@@_tmpa_tl
+         { \box_wd:N \l_@@_dest_box }
+         { \box_ht:N \l_@@_dest_box }
+         { \box_dp:N \l_@@_dest_box }
+      }
+      {
+        \exp_args:NV
+          \pdf_destination:nf
+          { \l_@@_tmpa_tl }
+          { #2 }
+      }
+    \Hy@RestoreLastskip   %defined in hyperref
+    \mode_if_horizontal:T { \spacefactor\@savsf }
+  }
+%    \end{macrocode}
+% \end{macro}
+% This are the three destinations commands. They are modelled along the
+% xetex version. It is not quite clear if really all three
+% are needed for the backends supported by this driver, but changing the hyperref
+% code would be difficult.
+%  \begin{macro}
+%    {
+%      \hyper@anchor,
+%      \hyper@anchorstart,
+%      \hyper@anchorend
+%    }
+%    \begin{macrocode}
+\cs_new_protected:Npn \hyper@anchor #1
+  {
+    \exp_args:NnV
+      \@@_destination:nn {#1} \l_@@_dest_pdfview_tl
+  }
+
+\cs_new_protected:Npn \hyper@anchorstart #1
+  {
+    \Hy@activeanchortrue
+    \exp_args:NnV
+      \@@_destination:nn {#1} \l_@@_dest_pdfview_tl
+  }
+
+\cs_new_protected:Npn \hyper@anchorend
+  {
+    \Hy@activeanchorfalse
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{GoTo Links}
+% The next three commands are for links inside the document,
+% to destinations (GoTo links).
+% The definition in \pkg{hyperref} have a first argument which
+% can be used to pass a semantical context. Currently this argument is
+% only used for \cs{cite} and only to change the color. The new
+% implementation uses it for a real hook.
+%
+% At first the internal link commands:
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_link_goto_begin:nw #1
+  {
+    \mode_leave_vertical:
+    \protected@edef \l_@@_dest_name_tmpa_tl { #1 }
+    \tl_if_empty:NTF \l_@@_dest_name_tmpa_tl
+      {
+        \msg_warning:nnx
+          { hyp }
+          { empty-destination-name }
+          { \c_@@_dest_undefined_tl }
+        \tl_set_eq:NN \l_@@_dest_name_tmpa_tl \c_@@_dest_undefined_tl
+      }
+      {
+        \@@_text_pdfstring:xoN
+          { \exp_args:No \HyperDestNameFilter { \l_@@_dest_name_tmpa_tl } }
+          { \l_@@_text_enc_dest_tl }
+          \l_@@_dest_name_tmpa_tl
+      }
+    \exp_args:No
+      \pdfannot_link_goto_begin:nw  { \l_@@_dest_name_tmpa_tl }
+  }
+
+\cs_new_protected:Npn \@@_link_goto_end:
+  {
+    \pdfannot_link_goto_end:
+  }
+%    \end{macrocode}
+%
+% Now the three hyperref commands.
+% The splitted commands \cs{hyper@linkstart} and \cs{hyper@linkend} are used for
+% footnotemarks, toc and natbib-cites.
+% \begin{function}{\hyper@link}
+% \begin{syntax}
+%  \cs{hyper@link}\Arg{context}\Arg{destination name}\Arg{link text}
+% \end{syntax}
+% This creates a complete GoTo link around the \meta{link text}
+% pointing to \meta{destination name}.
+% The hook |hyp/link/|\meta{context} is executed at the begin if it exists.
+%
+% The only \meta{context} for which a hook is predefined is |cite|.
+% Packages which want to use another \meta{context} should initialize the hook like
+% this:
+% \begin{verbatim}
+% \IfHookExistsTF{hyp/link/context}{}
+%   {\NewHook{hyp/link/context}}
+% \end{verbatim}
+%
+%  The hook code is executed in a group but before all the pdfannot hooks.
+% \end{function}
+% \begin{function}{\hyper@linkstart,\hyper@linkend}
+% \begin{syntax}
+%  \cs{hyper@linkstart}\Arg{context}\Arg{destination name}\\
+%  \cs{hyper@linkend}
+% \end{syntax}
+% This creates the start and end commands for a GoTo link around the text
+% between both pointing to \meta{destination name}.
+% The hook |hyp/link/|\meta{context} is executed at the begin if it exists
+% as with \cs{hyper@link}
+%
+% The commands open and close a group, so should be placed carefully. .
+% \end{function}
+
+% \pkg{hyperref} adds a group with \cs{Hy@colorlink}, we move this outside the link
+% so that it groups the context hook too.
+%    \begin{macrocode}
+
+\cs_new_protected:Npn \hyper@link #1 #2 #3 %#1 context, #2=destination name, #3 content
+  {
+    \bool_if:NTF \l_@@_annot_GoTo_bool
+      {
+        \Hy@VerboseLinkStart{#1}{#2}
+        \group_begin:
+        \hook_use:n {hyp/link/#1}
+        \@@_link_goto_begin:nw {#2}#3\Hy@xspace@end
+        \__hyp_link_goto_end:
+        \group_end:
+        \Hy@VerboseLinkStop
+      }{#3}
+  }
+
+\cs_new_protected:Npn \hyper@linkstart #1 #2 %#1 context, #2=destination name
+  {
+    \bool_if:NT \l_@@_annot_GoTo_bool
+      {
+        \Hy@VerboseLinkStart{#1}{#2}% only for debug
+        \group_begin:
+        \hook_use:n {hyp/link/#1}
+        \@@_link_goto_begin:nw {#2}
+      }
+  }
+
+\cs_new_protected:Npn \hyper@linkend
+  {
+    \bool_if:NT \l_@@_annot_GoTo_bool
+      {
+        \@@_link_goto_end:
+        \group_end:
+        \Hy@VerboseLinkStop
+      }
+  }
+%    \end{macrocode}
+%
+% \subsection{URI links}
+% We define a dictionary for the action dictionary. For now it is public.
+%   \begin{macrocode}
+\pdfdict_new:n   {l_hyp/annot/A/URI}
+\pdfdict_put:nnn {l_hyp/annot/A/URI}{Type}{/Action}
+\pdfdict_put:nnn {l_hyp/annot/A/URI}{S}{/URI}
+
+\cs_new_protected:Npn \hyper@linkurl #1 #2  %#1:link text #2: URI,
+  {
+    \bool_if:NTF \l_@@_annot_URI_bool
+      {
+        \group_begin:
+         \@@_text_pdfstring:xoN
+           { #2}
+           { \l_@@_text_enc_uri_print_tl }
+           \l_@@_uri_tmpa_tl
+         \pdfdict_put:nno{l_hyp/annot/A/URI}{URI}{\l_@@_uri_tmpa_tl}
+         \ifHy@href@ismap
+            \pdfdict_put:nnn{l_hyp/annot/A/URI}{IsMap}{true}
+         \fi
+         \tl_if_empty:NF \Hy@href@nextactionraw
+           {
+             \str_remove_once:Nn \Hy@href@nextactionraw {/Next}
+             \pdfdict_put:nno{l_hyp/annot/A/Next}{\Hy@href@nextactionraw}
+           }
+         \cs_set_eq:NN \# \c_hash_str
+         \cs_set_eq:NN \% \c_percent_str
+         \Hy@safe@activestrue
+         \mode_leave_vertical:
+         \pdfannot_link:nxn { URI }
+           {
+             /A
+               <<
+                 \pdfdict_use:n {l_hyp/annot/A/URI}
+               >>
+           }
+           {
+             #1
+             \Hy@xspace@end
+             \Hy@VerboseLinkStop %where is the start??
+           }
+         \group_end:
+      }
+      {#1}
+  }
+
+%    \end{macrocode}
+% \subsection{GoToR Links {files}}
+%    \begin{macrocode}
+\pdfdict_new:n   {l_hyp/annot/A/GoToR}
+\pdfdict_put:nnn {l_hyp/annot/A/GoToR}{Type}{/Action}
+\pdfdict_put:nnn {l_hyp/annot/A/GoToR}{S}{/GoToR}
+
+\cs_new_protected:Npn \hyper@linkfile #1 #2 #3 % link text, filename, destname
+  {
+   \bool_if:NTF \l_@@_annot_GoToR_bool
+     {
+        \group_begin:
+        \tl_set:Nn \l_@@_filename_tmpa_tl { #2 }
+        \Hy@CleanupFile \l_@@_filename_tmpa_tl
+        \@@_text_pdfstring:ooN
+          { \l_@@_filename_tmpa_tl }
+          { \l_@@_text_enc_file_print_tl }
+          \l_@@_filename_tmpa_tl
+        \pdfdict_put:nno {l_hyp/annot/A/GoToR}{F}{\l_@@_filename_tmpa_tl}
+        \@@_text_pdfstring:nnN
+          { #3 }
+          { \l_@@_text_enc_dest_print_tl }
+          \l_@@_dest_name_tmpa_tl
+        \Hy@MakeRemoteAction
+        \tl_if_blank:eTF {#3}
+          {
+            \pdfdict_put:nnx {l_hyp/annot/A/GoToR}{D}
+              {[\Hy@href@page/\l_@@_dest_pdfremotestartview_tl]}
+          }
+          {
+            \pdfdict_put:nno {l_hyp/annot/A/GoToR}{D}{\l_@@_dest_name_tmpa_tl}
+          }
+        \tl_if_empty:NF \Hy@href@nextactionraw
+          {
+            \str_remove_once:Nn \Hy@href@nextactionraw {/Next}
+            \pdfdict_put:nno{l_hyp/annot/A/Next}{Next}{\Hy@href@nextactionraw}
+          }
+        \mode_leave_vertical:
+        \pdfannot_link:nxn %expansion??
+          { GoToR }
+          {
+            /A<<
+              \pdfdict_use:n {l_hyp/annot/A/GoToR}
+            >>
+          }
+          {
+            #1\Hy@xspace@end
+            \Hy@VerboseLinkStop %where is the start??
+          }
+        \group_end:
+     }
+     {#1}
+  }
+%    \end{macrocode}
+%
+% \subsection{Launch links}
+%
+% We define \cs{hyper@linklaunch} for naming consistency
+%    \begin{macrocode}
+\pdfdict_new:n   {l_hyp/annot/A/Launch}
+\pdfdict_put:nnn {l_hyp/annot/A/Launch}{Type}{/Action}
+\pdfdict_put:nnn {l_hyp/annot/A/Launch}{S}{/Launch}
+
+\cs_new_protected:Npn \hyper@linklaunch #1 #2 #3 % filename, link text, Parameters
+  {
+   \bool_if:NTF \l_@@_annot_Launch_bool
+     {
+        \group_begin:
+          \@@_text_pdfstring:nnN
+            { #1 }
+            { \l_@@_text_enc_file_print_tl }
+            \l_@@_filename_tmpa_tl
+          \pdfdict_put:nno {l_hyp/annot/A/Launch}{F}{\l_@@_filename_tmpa_tl}
+          \@@_text_pdfstring:noN
+            { #3 }
+            { \l_@@_text_enc_para_print_tl }
+            \l_@@_para_tmpa_tl
+          \bool_if:nTF
+            {
+              \str_if_eq_p:Vn \l_@@_para_tmpa_tl {()}
+              ||
+              \pdf_version_compare_p:Nn > {1.9}
+            }
+            {
+              \pdfdict_remove:nn {l_hyp/annot/A/Launch}{Win}
+            }
+            {
+              \pdfdict_put:nnx {l_hyp/annot/A/Launch}{Win}
+                {<</P \l_@@_para_tmpa_tl /F \l_@@_filename_tmpa_tl >>}
+            }
+          \tl_if_empty:NF \Hy@href@nextactionraw
+            {
+              \str_remove_once:Nn \Hy@href@nextactionraw {/Next}
+              \pdfdict_put:nno{l_hyp/annot/A/Next}{Next}{\Hy@href@nextactionraw}
+            }
+          \mode_leave_vertical:
+          \pdfannot_link:nxn
+            { Launch }
+            {
+              /A
+              <<
+                \pdfdict_use:n {l_hyp/annot/A/Launch}
+              >>
+            }
+            {
+              #2\Hy@xspace@end
+              \Hy@VerboseLinkStop %where is the start??
+            }
+        \group_end:
+      }
+      {#2}
+  }
+%    \end{macrocode}
+% The actually command used by hyperref is \cs{@hyper@launch} which uses a delimited
+% argument, because of the color the definition is a bit convoluted.
+%    \begin{macrocode}
+\use:x
+  { % filename, anchor text, linkname
+    \cs_set_protected:Npn \exp_not:N \@hyper@launch run \c_colon_str ##1 \exp_not:N \\ ##2 ##3
+  }
+  {
+    \hyper@linklaunch {#1}{#2}{#3}
+  }
+%    \end{macrocode}
+%
+% \subsection{Named links (menu)}
+% We also define \cs{hyper@linknamed} for consistency.
+%    \begin{macrocode}
+\pdfdict_new:n   {l_hyp/annot/A/Named}
+\pdfdict_put:nnn {l_hyp/annot/A/Named}{Type}{/Action}
+\pdfdict_put:nnn {l_hyp/annot/A/Named}{S}{/Named}
+
+\cs_new_protected:Npn \hyper@linknamed #1 #2 %#1 action, #2 link text
+  {
+    \bool_if:NTF \l_@@_annot_Named_bool
+      {
+         \group_begin:
+         \pdfmeta_standard_verify:nnTF {named_actions}{#1}
+           {
+             \mode_leave_vertical:
+             \pdfdict_put:nnx {l_hyp/annot/A/Named}{N}
+               {\pdf_name_from_unicode_e:n{#1}}
+             \tl_if_empty:NF \Hy@href@nextactionraw
+               {
+                 \str_remove_once:Nn \Hy@href@nextactionraw {/Next}
+                 \pdfdict_put:nno{l_hyp/annot/A/Next}{Next}{\Hy@href@nextactionraw}
+               }
+             \pdfannot_link:nxn { Named }
+              {
+                /A
+                  <<
+                    \pdfdict_use:n { l_hyp/annot/A/Named }
+                  >>
+              }
+              {
+                #2
+                \Hy@xspace@end
+                \Hy@VerboseLinkStop
+              }
+           }
+           {
+             \msg_warning:nnn { hyp } { pdfa-no-named-action }{#1}
+             #2
+           }
+        \group_end:
+      }
+      {#2}
+  }
+
+%    \end{macrocode}
+%
+% \section{Link decorations}
+% \subsection{Functions to export and select colors}
+% We support two input syntax: color expressions and model with values.
+% \begin{function}{\@@_color_export:nnN,\@@_colormodel_export:nnnN}
+%   \begin{syntax}
+%    \cs{@@_color_export:nnN} \Arg{color} \Arg{export format} \meta{tlvar}\\
+%    \cs{@@_colormodel_export:nnnN} \Arg{color model}\Arg{value} \Arg{export format} \meta{tlvar}
+%   \end{syntax}
+%   This exports a color as space separated numbers as needed in in |/C|.
+%  \Arg{color} should have either the format |[model]{value}| or be a color expression.
+%  For examples: |[rgb]{1,0,.5}| or |red!50!blue|. The export format is either
+%  |space-sep-cmyk| or |space-sep-rgb|.
+% \end{function}
+%  \begin{macro}{\@@_color_export:nnN,\@@_colormodel_export:nnnN}
+%   Color keys need to parse color expressions. Two input types are supported:
+%  |color=[rgb]{1,0,.5}| and |color=red!50!blue|. The colors are exported
+%  to PDF syntax (space separated numbers).
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_color_export:nnN #1  #2  #3
+ {
+   \tl_if_head_eq_charcode:nNTF {#1}[ %]
+    {
+      \@@_colormodel_export:wnnN  #1 {#2} #3
+    }
+    {
+      \color_export:nnN {#1} {#2} #3
+    }
+ }
+
+\cs_new_protected:Npn \@@_colormodel_export:wnnN  [#1] #2 #3 #4
+  {
+     \color_export:nnnN {#1}{#2}{#3}#4
+  }
+
+\cs_generate_variant:Nn \@@_color_export:nnN {xVN}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{function}{\@@_color_select:n}
+%   \begin{syntax}
+%    \cs{@@_color_select:nN} \Arg{color} \\
+%   \end{syntax}
+%  These commands select a (text) color.
+%  \Arg{color} should have either the format |[model]{value}| or be a color expression.
+%  For examples: |[rgb]{1,0,.5}| or |red!50!blue|
+% \end{function}
+%  \begin{macro}{\@@_color_select:n,\@@_colormodel_select_aux:wn}
+%   Color keys need to parse color expressions. Two input types are supported:
+%  |color=[rgb]{1,0,.5}| and |color=red!50!blue|.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_color_select:n #1
+ {
+   \tl_if_head_eq_charcode:nNTF {#1}[ %]
+    {
+      \@@_colormodel_select_aux:wn  #1
+    }
+    {
+      \color_select:n {#1}
+    }
+ }
+
+\cs_new_protected:Npn \@@_colormodel_select_aux:wn  [#1] #2
+  {
+     \color_select:nn {#1}{#2}
+  }
+
+\cs_generate_variant:Nn \@@_color_select:n {e}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{function}{\@@_color_set:nn}
+%   \begin{syntax}
+%    \cs{@@_color_set:nN} \Arg{ name } \Arg{color} \\
+%   \end{syntax}
+%  These commands store the color in \Arg{name}.
+%  \Arg{color} should have either the format |[model]{value}| or be a color expression.
+%  For examples: |[rgb]{1,0,.5}| or |red!50!blue|
+% \end{function}
+%  \begin{macro}{\@@_color_set:nn,\@@_colormodel_set_aux:nwn}
+%   Color keys need to parse color expressions. Two input types are supported:
+%  |color=[rgb]{1,0,.5}| and |color=red!50!blue|.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_color_set:nn #1 #2
+ {
+   \tl_if_head_eq_charcode:nNTF {#2}[ %]
+    {
+      \@@_colormodel_set_aux:nwn  { #1 } #2
+    }
+    {
+      \color_set:nn {#1} {#2}
+    }
+ }
+
+\cs_new_protected:Npn \@@_colormodel_set_aux:nwn #1 [#2] #3
+  {
+     \color_set:nnn {#1}{#2}{#3}
+  }
+
+\cs_generate_variant:Nn \@@_color_set:nn {ne}
+%    \end{macrocode}
+% \end{macro}
+% \subsection{Textcolor of links}
+% colors are added in the hooks. This means that they can also be removed if needed.
+% They add a group---this isn't needed with hyperref code, but could be relevant
+% with low-level annotations.
+%    \begin{macrocode}
+\prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+  {
+     \hook_gput_code:nnn
+       {pdfannot/link/#2/begin}
+       {hyp/color}
+       {
+         \bool_if:cT { l_hyp_annot_color#1_bool }
+           {
+             \group_begin:
+             \color_select:n { hyp/color/#1}
+           }
+       }
+     \hook_gput_code:nnn
+       {pdfannot/link/#2/end}
+       {hyp/color}
+       {
+         \bool_if:cT { l_hyp_annot_color#1_bool }
+           {
+             \group_end:
+           }
+       }
+  }
+%    \end{macrocode}
+%
+% \begin{hypkey}{colorlinks}
+% This key also resets the border and borderstyle.
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    ,colorlinks .meta:n =
+      {
+        ,pdfborder={0~0~0}
+        ,pdfborderstyle=
+        ,colorurl  =#1
+        ,colorlink =#1
+        ,colorrun  =#1
+        ,colormenu =#1
+        ,colorfile =#1
+        }
+    ,colorlinks .default:n = {true}
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% \begin{hypkey}{colorurl,colorlink,colorrun,colormenu,colorfile}
+% \begin{hypkey}{urlcolor,linkcolor,runcolor,menucolor,filecolor}
+% \begin{hypkey}{allcolor}
+%    \begin{macrocode}
+\seq_map_inline:Nn \c_@@_annot_types_seq
+  {
+     \keys_define:nn { hyp / setup }
+       {
+         ,color#1 .bool_set:c = { l_hyp_annot_color#1_bool }
+         ,#1color .code:n =     { \@@_color_set:ne {hyp/color/#1}{##1} }
+       }
+  }
+
+\keys_define:nn { hyp / setup }
+  {
+    ,allcolors .meta:n =
+      {
+        ,urlcolor=#1
+        ,linkcolor=#1
+        ,runcolor=#1
+        ,filecolor=#1
+        ,menucolor=#1
+      }
+    ,allcolors .value_required:n = true
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% \end{hypkey}
+% \end{hypkey}
+% \subsection{Style and color of borders}
+% \subsubsection{Border color}
+% The border color is set by link type. The color can be set as rgb (default)
+% or cmyk (unusual). This can be set with the |bordercolormodel| key:
+%\begin{hypkey}{bordercolormodel}
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    ,bordercolormodel .choices:nn =
+     {rgb,cmyk}
+     { \str_gset:Nn \g_@@_bordercolormodel_str {space-sep-#1}}
+    ,bordercolormodel .initial:n ={rgb}
+  }
+%    \end{macrocode}
+% \end{hypkey}
+%    \begin{macrocode}
+\prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        #1bordercolor .code:n =
+          {
+             \tl_if_empty:nTF { ##1 }
+               {
+                 \pdfannot_dict_remove:nn
+                  {link/#2}
+                  { C }
+               }
+               {
+                 \@@_color_export:xVN {##1}\g_@@_bordercolormodel_str \l_@@_tmpa_tl
+                 \pdfannot_dict_put:nnx
+                   {link/#2}
+                   { C }
+                   { [\l_@@_tmpa_tl] }
+               }
+          }
+      }
+  }
+
+\keys_define:nn { hyp / setup }
+  {
+    ,allbordercolors .meta:n =
+      {
+        ,linkbordercolor=#1
+        ,urlbordercolor =#1
+        ,filebordercolor=#1
+        ,menubordercolor=#1
+        ,runbordercolor =#1
+      }
+    ,allbordercolors .value_required:n = true
+  }
+
+%    \end{macrocode}
+%
+% \subsubsection{Borderwidth and -arc}
+%
+%    \begin{macrocode}
+\prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        #1border .code:n =
+          {
+             \tl_if_empty:nTF { ##1 }
+               {
+                 \pdfannot_dict_remove:nn
+                  {link/#2}
+                  { Border }
+               }
+               {
+                 \pdfannot_dict_put:nnn
+                   {link/#2}
+                   { Border }
+                   { [##1] }
+               }
+          }
+      }
+  }
+\keys_define:nn { hyp / setup }
+  {
+    ,pdfborder  .code:n =
+      {
+        \tl_if_empty:nTF { #1 }
+         {
+           \prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+             {
+               \pdfannot_dict_remove:nn
+                  {link/##2}
+                  { Border }
+             }
+         }
+         {
+           \prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+             {
+               \pdfannot_dict_put:nnn
+                 {link/##2}
+                 { Border }
+                 { [#1] }
+             }
+         }
+      }
+    ,pdfborder .initial:n = {0~0~1},
+  }
+%    \end{macrocode}
+% \subsubsection{Borderstyle}
+% This keys fill the extended /BS entry (a dictionary).
+% \begin{hypkey}{pdfborderstyle,urlborderstyle,linkborderstyle,
+% runborderstyle,fileborderstyle,
+% menuborderstyle}
+%    \begin{macrocode}
+\prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        #1borderstyle .code:n =
+          {
+             \tl_if_empty:nTF { ##1 }
+               {
+                 \pdfannot_dict_remove:nn
+                  {link/#2}
+                  { BS }
+               }
+               {
+                 \pdfannot_dict_put:nnn
+                   {link/#2}
+                   { BS }
+                   { <<##1>> }
+               }
+          }
+      }
+  }
+\keys_define:nn { hyp / setup }
+  {
+    ,pdfborderstyle  .code:n =
+      {
+        \tl_if_empty:nTF { #1 }
+         {
+           \prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+             {
+               \pdfannot_dict_remove:nn
+                  {link/##2}
+                  { BS }
+             }
+         }
+         {
+           \prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+             {
+               \pdfannot_dict_put:nnn
+                 {link/##2}
+                 { BS }
+                 { <<#1>> }
+             }
+         }
+      }
+    ,pdfborderstyle .initial:n = {},
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% \subsection{ocgcolorlinks}
+% OCG colorlinks need objects and an entry in the catalog.
+% Perhaps the objects need public names to avoid that ocgx2 has to create
+% duplicates?
+% TODO
+% \begin{macro}{\@@_ocg_init:}
+% This commands write the objects as needed if ocg links are used.
+% The initialization should happens only once.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_ocg_init:
+  {
+     \pdf_object_new:nn   { l_@@_ocg_view_dict_obj }   { dict }
+     \pdf_object_new:nn   { l_@@_ocg_print_dict_obj }  { dict }
+     \pdf_object_new:nn   { l_@@_ocg_config_dict_obj } { dict }
+     \pdf_object_new:nn   { l_@@_ocg_ref_array_obj }   { array }
+        \pdf_object_write:nx { l_@@_ocg_ref_array_obj }
+          {
+            \pdf_object_ref:n { l_@@_ocg_view_dict_obj }
+            \c_space_tl
+            \pdf_object_ref:n { l_@@_ocg_print_dict_obj }
+          }
+        \pdf_object_write:nn { l_@@_ocg_view_dict_obj }
+          {
+            /Type/OCG
+            /Name(View)
+            /Usage
+             <<
+              /Print <</PrintState/OFF>>~
+              /View  <</ViewState/ON  >>~
+             >>
+          }
+        \pdf_object_write:nn { l_@@_ocg_print_dict_obj }
+          {
+            /Type/OCG
+            /Name(Print)
+            /Usage
+             <<
+              /Print <</PrintState/ON>>~
+              /View  <</ViewState/OFF>>~
+             >>
+          }
+       \pdfmanagement_add:nnx { Catalog / OCProperties }{OCGs }{ \pdf_object_ref:n {l_@@_ocg_view_dict_obj} }
+       \pdfmanagement_add:nnx { Catalog / OCProperties }{OCGs }{ \pdf_object_ref:n {l_@@_ocg_print_dict_obj} }
+       \pdf_object_write:nx { l_@@_ocg_config_dict_obj }
+         {
+           /OFF[\pdf_object_ref:n { l_@@_ocg_print_dict_obj }]
+           /AS[
+             <<
+              /Event/View
+              /OCGs\c_space_tl \pdf_object_ref:n { l_@@_ocg_ref_array_obj }
+              /Category[/View]
+             >>
+             <<
+              /Event/Print
+              /OCGs\c_space_tl \pdf_object_ref:n { l_@@_ocg_ref_array_obj }
+              /Category[/Print]
+             >>
+             <<
+              /Event/Export
+              /OCGs\c_space_tl \pdf_object_ref:n { l_@@_ocg_ref_array_obj }
+              /Category[/Print]
+             >>
+              ]
+         }
+       \pdfmanagement_add:nnx { Catalog / OCProperties }{ D }{ \pdf_object_ref:n { l_@@_ocg_config_dict_obj} }
+       \cs_gset:Npn \@@_ocg_init: {}
+  }
+%    \end{macrocode}
+% \end{macro}
+% We use like with colors a hook, this allows ocgx to replace it.
+% The implementation is rather simple and uses a box.
+%    \begin{macrocode}
+\prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+  {
+     \hook_gput_code:nnn
+       {pdfannot/link/#2/begin}
+       {hyp/ocg}
+       {
+         \bool_if:cT { l_hyp_annot_ocgcolor#1_bool }
+           {
+             \@@_ocg_init:
+             \group_begin:
+             \hbox_set:Nw \l_@@_tmpa_box
+           }
+       }
+     \hook_gput_code:nnn
+       {pdfannot/link/#2/end}
+       {hyp/ocg}
+       {
+         \bool_if:cT { l_hyp_annot_ocgcolor#1_bool }
+           {
+             \hbox_set_end:
+               \mbox
+                 {
+                   \pdf_bdcobject:nn {OC}{l_@@_ocg_print_dict_obj}
+                   \hbox_overlap_right:n { \box_use:N \l_@@_tmpa_box }
+                   \pdf_emc:
+                   \pdf_bdcobject:nn {OC}{l_@@_ocg_view_dict_obj}
+                   \group_begin:
+                   \color_select:n { hyp/color/#1 }
+                   \box_use_drop:N \l_@@_tmpa_box
+                   \group_end:
+                   \pdf_emc:
+                 }
+             \group_end:
+           }
+       }
+  }
+%    \end{macrocode}
+%
+% \begin{hypkey}
+%  {
+%   ocgcolorlinks,
+%   ocgcolorlink,
+%   ocgcolorurl,
+%   ocgcolorfile,
+%   ocgcolormenu,
+%   ocgcolorrun
+%   }
+%   These are the keys for ocgcolors. We try to disable it
+%   for pdf version below 1.5
+%    \begin{macrocode}
+\pdf_version_compare:NnTF < {1.5}
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        ,_ocgcolorlinks .code:n =
+          {
+            \msg_warning:nnxx
+              { hyp }
+              { ignore-deprecated-or-unknown-option-in-pdf-version }
+              { ocgcolorlinks } { \pdf_version_major:.\pdf_version_minor: }
+          }
+      }
+  }
+  {
+     \keys_define:nn { hyp / setup }
+       {
+         ,_ocgcolorlinks .meta:n =
+            {
+              ocgcolorlink=#1,
+              ocgcolorurl=#1,
+              ocgcolorfile=#1,
+              ocgcolorrun=#1,
+              ocgcolormenu=#1
+            }
+         ,_ocgcolorlinks .default:n = true
+       }
+  }
+
+\keys_define:nn { hyp / setup }
+  {
+    ,ocgcolorlinks .choice:
+    ,ocgcolorlinks / true .meta:n =
+      {
+        pdfborder      ={0~0~0},
+        pdfborderstyle ={},
+        colorlinks     = false,
+        _ocgcolorlinks = true
+      }
+    ,ocgcolorlinks / false .meta:n =
+      {
+        _ocgcolorlinks = false
+      }
+    ,ocgcolorlinks .default:n = {true}
+  }
+
+\seq_map_inline:Nn \c_@@_annot_types_seq
+  {
+    \pdf_version_compare:NnTF < {1.5}
+      {
+        \keys_define:nn { hyp / setup }
+          {
+            ,ocgcolor#1 .code:n=
+              {
+                \msg_warning:nnxx
+                  { hyp }
+                  { ignore-deprecated-or-unknown-option-in-pdf-version }
+                  { ocgcolor#1 }
+                  { \pdf_version_major:.\pdf_version_minor: }
+              }
+          }
+      }
+      {
+        \keys_define:nn { hyp / setup }
+          {
+            ,ocgcolor#1 .bool_set:c = { l_hyp_annot_ocgcolor#1_bool }
+          }
+      }
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% \subsection{Highlighting}
+% This keys set what happens if you click on a link
+%    \begin{macrocode}
+\prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        ,#1highlight .choices:nn =
+          { /I, /N, /O, /P}
+          {
+                \pdfannot_dict_put:nnn
+                  {link/#2}
+                  { H }
+                  { ##1 }
+
+          }
+        ,#1highlight / .code:n =
+         {
+           \pdfannot_dict_remove:nn
+             {link/#2}
+             { H }
+
+          }
+        ,#1highlight / unknown .code:n =
+          {
+           \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+             { pdfhighlight }
+             { /I~(inverse), /N~(no effect), /O~(outline), /P~(inset) }
+             { \exp_not:n {##1} }
+          }
+      }
+  }
+
+
+\keys_define:nn { hyp / setup }
+  {
+    ,pdfhighlight .choices:nn =
+      { /I, /N, /O, /P}
+      {
+        \prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+          {
+            \pdfannot_dict_put:nnn
+              {link/####2}
+              { H }
+              { #1  }
+          }
+      }
+    ,pdfhighlight / .code:n =
+     {
+        \prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+          {
+            \pdfannot_dict_remove:nn
+              {link/##2}
+              { H }
+          }
+      }
+    ,pdfhighlight .initial:n = {/I},
+    ,pdfhighlight / unknown .code:n =
+      {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfhighlight }
+         { /I~(inverse), /N~(no effect), /O~(outline), /P~(inset) }
+         { \exp_not:n {#1} }
+      }
+  }
+%    \end{macrocode}
+%
+% \subsection{Hiding links}
+% This key disable all appearance keys. The link themselves are still there.
+% \begin{hypkey}{hidelinks,hidelink,hideurl,hidefile,hiderun,hidemenu}
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    hidelinks .meta:n =
+      {
+        ,colorlinks    = false
+        ,ocgcolorlinks = false
+        ,pdfborder     = { 0~0~0 }
+        ,pdfborderstyle=
+      }
+  }
+
+\seq_map_inline:Nn \c_@@_annot_types_seq
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        hide#1 .meta:n =
+          {
+             ,color#1       = false
+             ,ocgcolor#1    = false
+             ,#1border      = { 0~0~0 }
+             ,#1borderstyle =
+          }
+      }
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% \subsection{color schemes and settings}
+% This define the key for the color schemes and sets the default colors.
+% \begin{hypkey}{colorscheme}
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    colorscheme .code:n =
+      {
+        \prop_map_inline:cn { c_@@_colorscheme_#1_prop }
+          {
+            \keys_set:nn { hyp /setup }
+              {
+                 ##1 = ##2
+              }
+          }
+      }
+  }
+\keys_set:nn { hyp / setup } {colorscheme=phelype}
+%    \end{macrocode}
+% \end{hypkey}
+%
+% \section{Keys}
+%
+% \subsection{Ignored keys}
+% The following are ignored (with or without warnings)
+% \begin{hypkey}{unicode,pdfencoding,pdfversion}
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    ,unicode     .code:n = {}
+    ,pdfencoding .code:n = {}
+    ,pdfversion .code:n =
+      {
+         \msg_warning:nn { hyp }{ pdfversion-disabled }
+      }
+   }
+%
+%    \end{macrocode}
+% \end{hypkey}
+%
+% \subsection{Various keys for the pdf and linking behaviour}
+% This keys are typically set only once.
+%
+% \begin{hypkey}{verbose,debug,draft,final}
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+ {
+   ,verbose .choice:
+   ,verbose / true  .code:n = { \Hy@verbosetrue}
+   ,verbose / false .code:n = { \Hy@verbosefalse}
+   ,verbose .default:n = {true}
+   ,debug .meta:n = {verbose=#1}
+   ,debug .default:n = {true}
+ }
+\keys_define:nn { hyp / setup }
+  {
+   ,draft .code:n =
+     {
+       \Hy@drafttrue
+       \PassOptionsToPackage{draft}{bookmark}
+     }
+   ,final .code:n =
+     {
+       \Hy@finaltrue
+       \PassOptionsToPackage{final}{bookmark}
+     }
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% \begin{hypkey}{extension,hypertexnames,naturalnames,
+%   pageanchor,linktoc,linktocpage,plainpages,localanchorname,
+%   linkfileprefix}
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+ {
+   ,extension .tl_set:N = \XR@ext
+   ,extension .initial:n= pdf
+   ,hypertexnames .choice:
+   ,hypertexnames / true  .code:n = { \Hy@hypertexnamestrue}
+   ,hypertexnames / false .code:n = { \Hy@hypertexnamesfalse}
+   ,hypertexnames .default:n = {true}
+   ,linkfileprefix .tl_set:N  = \Hy@linkfileprefix
+   ,localanchorname .choice:
+   ,localanchorname / true  .code:n = { \Hy@localanchornametrue }
+   ,localanchorname / false .code:n = { \Hy@localanchornamefalse }
+   ,localanchorname .default:n = {true}
+   ,naturalnames .choice:
+   ,naturalnames / true  .code:n = { \Hy@naturalnamestrue}
+   ,naturalnames / false .code:n = { \Hy@naturalnamesfalse}
+   ,naturalnames .default:n = {true}
+   ,pageanchor .choice:
+   ,pageanchor / true  .code:n = { \Hy@pageanchortrue}
+   ,pageanchor / false .code:n = { \Hy@pageanchorfalse}
+   ,pageanchor .default:n = {true}
+   ,plainpages .choice:
+   ,plainpages / true  .code:n = { \Hy@plainpagestrue}
+   ,plainpages / false .code:n = { \Hy@plainpagesfalse}
+   ,plainpages .default:n = {true}
+ }
+
+\keys_define:nn { hyp / setup }
+ {
+   ,linktoc .choices:nn = { none, section, all, page }
+     {
+       \cs_set_eq:Nc \Hy@linktoc { Hy@linktoc@#1 }
+     }
+   ,linktoc / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice }
+         { linktoc }
+         { none, section, all, page }
+         { \exp_not:n {#1} }
+     }
+   ,linktocpage .choice:
+   ,linktocpage / true  .meta:n = {linktoc=page}
+   ,linktocpage / false .meta:n = {linktoc=section}
+   ,linktocpage .default:n = true
+ }
+
+%    \end{macrocode}
+% \end{hypkey}
+% \begin{hypkey}{link,url,file,menu,run}
+% This booleans allow to disable the link types.
+%    \begin{macrocode}
+\prop_map_inline:Nn \c_@@_map_hyp_annot_prop
+  {
+    \keys_define:nn { hyp / setup }
+     {
+       ,#1 .bool_set:c = {l_@@_annot_#2_bool}
+     }
+  }
+%    \end{macrocode}
+% \end{hypkey}
+%
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+ {
+   ,baseurl       .code:n =
+     {
+       \@@_text_pdfstring:ooN  { #1 } {\l_@@_text_enc_uri_print_tl} \l_@@_tmpa_tl
+        \tl_if_empty:NTF \l_@@_tmpa_tl
+          {
+             \pdfmanagement_remove:nn {Catalog} { URI }
+          }
+          {
+             \pdfmanagement_add:nnx {Catalog} { URI }{ <</Base \l_@@_tmpa_tl>> }
+          }
+     }
+   %only false does something ...
+   ,bookmarks .choice:
+   ,bookmarks / false .code:n = {\RemoveFromHook {begindocument/before}[hyperref/bookmark]}
+   ,bookmarks / true .code:n = {}
+   ,bookmarks .default:n = {true}
+   ,bookmarksnumbered .choice:
+   ,bookmarksnumbered / false .code:n = { \Hy@bookmarksnumberedfalse }
+   ,bookmarksnumbered / true .code:n  = { \Hy@bookmarksnumberedtrue }
+   ,bookmarksnumbered .default:n      = {true}
+   ,bookmarksopen .choice:
+   ,bookmarksopen / false .code:n = { \Hy@bookmarksopenfalse }
+   ,bookmarksopen / true .code:n  = { \Hy@bookmarksopentrue }
+   ,bookmarksopen .default:n      = {true}
+   ,bookmarksopenlevel .tl_set:N = \@bookmarksopenlevel
+   ,bookmarkstype .tl_set:N = \Hy@bookmarkstype
+   ,pdfcenterwindow    .choice:
+   ,pdfcenterwindow / false .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences }{ CenterWindow }
+     }
+   ,pdfcenterwindow / true .code:n =
+     {
+       \pdfmanagement_add:nnn {Catalog / ViewerPreferences } { CenterWindow }{ true }
+     }
+   ,pdfcenterwindow /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences }{ CenterWindow }
+     }
+   ,pdfcenterwindow / unknown .code:n =
+     {
+       \msg_warning:nnxx { hyp } { no-bool }
+         { pdfcenterwindow }
+         { \exp_not:n {#1} }
+     }
+   ,pdfcenterwindow    .default:n = true
+   ,pdfdirection    .choice:
+   ,pdfdirection / L2R .code:n =
+     {
+       \pdfmanagement_add:nnn {Catalog / ViewerPreferences } { Direction }{ /L2R }
+     }
+   ,pdfdirection / R2L .code:n =
+     {
+       \pdfmanagement_add:nnn {Catalog / ViewerPreferences } { Direction }{ /R2L }
+     }
+   ,pdfdirection /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { Direction }
+     }
+   ,pdfdirection / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfdirection }
+         { L2R , R2L }
+         { \exp_not:n {#1} }
+     }
+   ,pdfdisplaydoctitle    .choice:
+   ,pdfdisplaydoctitle / false .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { DisplayDocTitle }
+     }
+   ,pdfdisplaydoctitle / true .code:n =
+     {
+       \pdfmanagement_add:nnn {Catalog / ViewerPreferences } { DisplayDocTitle } { true }
+     }
+   ,pdfdisplaydoctitle    .default:n = true
+   ,pdfduplex    .choices:nn =
+     {Simplex, DuplexFlipShortEdge, DuplexFlipLongEdge}
+     {
+       \pdf_version_compare:NnTF > {1.6}
+         {
+           \pdfmanagement_add:nnn {Catalog / ViewerPreferences }
+             { PrintDuplex } { /#1 }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfduplex}
+             {\pdf_version:}
+         }
+     }%
+   ,pdfduplex /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { PrintDuplex }
+     }
+   ,pdfduplex / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfduplex }
+         { Simplex, DuplexFlipShortEdge, DuplexFlipLongEdge }
+         { \exp_not:n {#1} }
+     }
+   ,pdffitwindow    .choice:
+   ,pdffitwindow / false .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences }  { FitWindow }
+     }
+   ,pdffitwindow / true .code:n =
+     {
+       \pdfmanagement_add:nnn {Catalog / ViewerPreferences } { FitWindow } { true }
+     }
+   ,pdffitwindow /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { FitWindow }
+     }
+   ,pdffitwindow    .default:n = true
+   ,pdffitwindow / unknown .code:n =
+     {
+       \msg_warning:nnxx { hyp } { no-bool }
+         { pdffitwindow }
+         { \exp_not:n {#1} }
+     }
+   ,pdflinkmargin .code:n = { \pdfannot_link_margin:n { #1 } }
+   ,pdflinkmargin .initial:n = {1pt}
+   ,pdfmenubar    .choice:
+   ,pdfmenubar / true .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { HideMenubar }
+     }
+   ,pdfmenubar / false .code:n =
+     {
+       \pdfmanagement_add:nn {Catalog / ViewerPreferences }
+          { HideMenubar } { true }
+     }
+   ,pdfmenubar /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { HideMenubar }
+     }
+   ,pdfmenubar    .default:n = true
+   ,pdfmenubar / unknown .code:n =
+     {
+       \msg_warning:nnxx { hyp } { no-bool }
+         { pdfmenubar }
+         { \exp_not:n {#1} }
+     }
+   ,pdfnewwindow .choice:
+   ,pdfnewwindow / true .code:n =
+     {
+       \pdfdict_put:nnn {l_hyp/annot/A/GoToR}{/NewWindow}{true}
+       \pdfdict_put:nnn {l_hyp/annot/A/Launch}{/NewWindow}{true}
+     }
+   ,pdfnewwindow / false .code:n =
+     {
+       \pdfdict_put:nnn {l_hyp/annot/A/GoToR}{/NewWindow}{false}
+       \pdfdict_put:nnn {l_hyp/annot/A/Launch}{/NewWindow}{false}
+     }
+   ,pdfnewwindow /  .code:n =
+     {
+       \pdfdict_remove:nn {l_hyp/annot/A/GoToR}{/NewWindow}
+       \pdfdict_remove:nn {l_hyp/annot/A/Launch}{/NewWindow}
+     }
+   ,pdfnonfullscreenpagemode   .choices:nn =
+     { UseNone, UseOutlines, UseThumbs, FullScreen, UseOC } %pdf 1.5
+     {
+       \pdfmanagement_add:nnx {Catalog / ViewerPreferences }
+         { NonFullScreenPageMode} {/#1}
+     }
+   ,pdfnonfullscreenpagemode / UseAttachments .code:n =
+     {
+       \pdf_version_compare:NnTF < {1.6}
+         {
+           %message
+         }
+         {
+           \pdfmanagement_add:nnx {Catalog / ViewerPreferences }
+             {NonFullScreenPageMode}{/UseAttachments}
+         }
+     }
+   ,pdfnonfullscreenpagemode /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { NonFullScreenPageMode }
+     }
+   ,pdfnonfullscreenpagemode / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfnonfullscreenpagemode }
+         { UseNone, UseOutlines, UseThumbs, FullScreen, UseOC, UseAttachments (PDF 1.6) }
+         { \exp_not:n {#1} }
+     }
+   ,pdfnumcopies .code:n =
+     {
+       \pdf_version_compare:NnTF > {1.6}
+         {
+           \tl_if_empty:nTF {#1}
+             {
+               \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { NumCopies }
+             }
+             {
+               \pdfmanagement_add:nnx {Catalog / ViewerPreferences }
+                 {NumCopies}{#1}
+             }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfnumcopies}
+             {\pdf_version:}
+         }
+     }
+   ,pdfpagelayout .choices:nn =
+     { SinglePage, OneColumn, TwoColumnLeft, TwoColumnRight, TwoPageLeft, TwoPageRight}
+     { \pdfmanagement_add:nnx {Catalog} { PageLayout }{ /#1 } }
+   ,pdfpagelayout / .code:n =
+     { \pdfmanagement_remove:nn {Catalog} { PageLayout } }
+   ,pdfpagelayout / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfpagelayout }
+         { SinglePage, OneColumn, TwoColumnLeft, TwoColumnRight, TwoPageLeft, TwoPageRight }
+         { \exp_not:n {#1} }
+     }
+   ,pdfpagemode   .choices:nn =
+     { UseNone, UseOutlines, UseThumbs, FullScreen, UseOC } %pdf 1.5
+     { \pdfmanagement_add:nnx {Catalog} { PageMode }{ /#1 } }
+   ,pdfpagemode / UseAttachments .code:n =
+     {
+       \pdf_version_compare:NnTF > {1.5}
+         {
+           \pdfmanagement_add:nnx {Catalog} { PageMode }{ /UseAttachments }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-value-in-pdf-version}
+             {UseAttachments}
+             {\pdf_version:}
+         }
+     }
+   ,pdfpagemode   .initial:n  = { UseOutlines } %for now ...
+   ,pdfpagemode / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfpagemode }
+         { UseNone, UseOutlines, UseThumbs, FullScreen, UseOC, UseAttachments (PDF 1.6) }
+         { \exp_not:n {#1} }
+     }
+   ,pdfpagescrop  .code:n =
+     {
+       \tl_if_empty:nTF %or blank?
+         {
+           \pdfmanagement_remove:nn {Pages} { CropBox }
+         }
+         {
+           \pdfmanagement_add:nnx {Pages} { CropBox } { [#1] }
+         }
+     }
+   ,pdfpicktraybypdfsize    .choice:
+   ,pdfpicktraybypdfsize / true .code:n =
+     {
+       \pdf_version_compare:NnTF > {1.6}
+         {
+           \pdfmanagement_add:nnn {Catalog / ViewerPreferences }
+             { PickTrayByPDFSize } { true }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfpicktraybypdfsize}
+             {\pdf_version:}
+         }
+     }
+   ,pdfpicktraybypdfsize / false .code:n =
+     {
+       \pdf_version_compare:NnTF > {1.6}
+         {
+           \pdfmanagement_add:nnn {Catalog / ViewerPreferences }
+             { PickTrayByPDFSize } { false }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfpicktraybypdfsize}
+             {\pdf_version:}
+         }
+     }
+   ,pdfpicktraybypdfsize /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { PickTrayByPDFSize }
+     }
+   ,pdfpicktraybypdfsize / unknown .code:n =
+     {
+       \msg_warning:nnxx { hyp } { no-bool }
+         { picktraybypdfsize }
+         { \exp_not:n {#1} }
+     }
+   ,pdfprintarea    .choices:nn =
+     { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+     {
+       \pdf_version_compare:NnTF < {2.0}
+         {
+           \pdfmanagement_add:nnx {Catalog / ViewerPreferences }
+             { PrintArea } { /#1 }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfprintarea}
+             {\pdf_version:}
+         }
+     }%
+   ,pdfprintarea /  .code:n =
+     { \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { PrintArea } }
+   ,pdfprintarea / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfprintarea }
+         { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+         { \exp_not:n {#1} }
+     }
+   ,pdfprintclip    .choices:nn =
+     { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+     {
+       \pdf_version_compare:NnTF < {2.0}
+         {
+           \pdfmanagement_add:nnx {Catalog / ViewerPreferences }
+             { PrintClip } { /#1 }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfprintclip}
+             {\pdf_version:}
+         }
+     }%
+   ,pdfprintclip /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { PrintClip }
+     }
+   ,pdfprintclip / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfprintclip }
+         { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+         { \exp_not:n {#1} }
+     }
+   ,pdfprintpagerange .code:n =
+     {
+       \pdf_version_compare:NnTF > {1.6}
+         {
+           \tl_if_empty:nTF { #1}
+             {
+               \pdfmanagement_remove:nn {Catalog / ViewerPreferences }
+                 { PrintPageRange }
+             }
+             {
+              \pdfmanagement_add:nnx {Catalog / ViewerPreferences }
+                 {PrintPageRange}{[#1]}
+             }
+         }
+         {
+            \msg_warning:nnxx
+              {hyp}
+              {ignore-deprecated-or-unknown-option-in-pdf-version}
+              {pdfprintpagerange}
+              {\pdf_version:}
+         }
+     }
+   ,pdfprintscaling    .choices:nn =
+     { None, AppDefault }
+     {
+       \pdf_version_compare:NnTF > {1.5}
+         {
+           \pdfmanagement_add:nnx {Catalog / ViewerPreferences }
+             { PrintScaling } { /#1 }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfprintscaling}
+             {\pdf_version:}
+         }
+     }%
+   ,pdfprintscaling /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } {PrintScaling }
+     }
+   ,pdfprintscaling / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfprintarea }
+         { None, AppDefault }
+         { \exp_not:n {#1} }
+     }
+   ,pdfremotestartview .code:n =
+     {
+       \tl_set:Nx \l_@@_tmpa_tl {#1~null~null~null~}
+       \exp_args:NNV
+       \regex_extract_once:NnNTF \c_@@_dest_startview_regex \l_@@_tmpa_tl  \l_@@_tmpa_seq
+         {
+           \tl_set:Nx \l_@@_dest_pdfremotestartview_tl {\seq_item:Nn \l_@@_tmpa_seq {1}}
+         }
+         {
+           \msg_warning:nnnn {hyp}{invalid-destination-value}{#1}{pdfremotestartview}
+           \tl_set:Nn \l_@@_dest_pdfremotestartview_tl {Fit}
+         }
+     }
+   ,pdfremotestartview .initial:n = {Fit}
+   % pdfstartpage is special as it shares code with pdfstartview
+   ,pdfstartpage .code:n =
+     {
+       \tl_gset:Nx \g_@@_dest_pdfstartpage_tl { #1 }
+       \bool_if:nTF
+         { \tl_if_empty_p:N \g_@@_dest_pdfstartpage_tl || \tl_if_empty_p:N \g_@@_dest_pdfstartview_tl }
+         {
+           \pdfmanagement_remove:nn {Catalog} { OpenAction }
+         }
+         {
+           \pdfmanagement_add:nnx {Catalog} { OpenAction }
+             {
+               [\pdf_pageobject_ref:n {\g_@@_dest_pdfstartpage_tl}~/\g_@@_dest_pdfstartview_tl]
+             }
+         }
+     }
+   ,pdfstartpage .initial:n =1
+   ,pdfstartview .code:n =
+     {
+       \tl_set:Nx \l_@@_tmpa_tl {#1~null~null~null~}
+       \exp_args:NNV
+       \regex_extract_once:NnNTF \c_@@_dest_startview_regex \l_@@_tmpa_tl  \l_@@_tmpa_seq
+         {
+           \tl_gset:Nx \g_@@_dest_pdfstartview_tl {\seq_item:Nn \l_@@_tmpa_seq {1}}
+         }
+         {
+           \msg_warning:nnnn {hyp}{invalid-destination-value}{#1}{pdfstartview}
+           \tl_gset:Nn \g_@@_dest_pdfstartview_tl {Fit}
+         }
+       \bool_if:nTF
+         { \tl_if_empty_p:N \g_@@_dest_pdfstartpage_tl || \tl_if_empty_p:N \g_@@_dest_pdfstartview_tl }
+         {
+           \pdfmanagement_remove:nn {Catalog} { OpenAction }
+         }
+         {
+           \pdfmanagement_add:nnx {Catalog} { OpenAction }
+             {
+               [\pdf_pageobject_ref:n {\g_@@_dest_pdfstartpage_tl}~/\g_@@_dest_pdfstartview_tl]
+             }
+         }
+     }
+   ,pdfstartview .initial:n = Fit
+   ,pdftoolbar    .choice:
+   ,pdftoolbar / true .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { HideToolbar }
+     }
+   ,pdftoolbar / false .code:n =
+     {
+       \pdfmanagement_add:nnn {Catalog / ViewerPreferences }
+         { HideToolbar } { true }
+     }
+   ,pdftoolbar / true .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { HideToolbar }
+     }
+   ,pdftoolbar    .default:n = true
+   ,pdftoolbar / unknown .code:n =
+     {
+       \msg_warning:nnxx { hyp } { no-bool }
+         { pdftoolbar }
+         { \exp_not:n {#1} }
+     }
+   % pdfview see below.
+   ,pdfviewarea    .choices:nn =
+     { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+     {
+       \pdf_version_compare:NnTF < {2.0}
+         {
+           \pdfmanagement_add:nnn {Catalog / ViewerPreferences }
+             { ViewArea } { /#1 }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfviewarea}
+             {\pdf_version:}
+         }
+     }%
+   ,pdfviewarea /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { ViewArea }
+     }
+   ,pdfviewarea / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfviewarea }
+         { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+         { \exp_not:n {#1} }
+     }
+   ,pdfviewclip    .choices:nn =
+     { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+     {
+       \pdf_version_compare:NnTF < {2.0}
+         {
+           \pdfmanagement_add:nnn {Catalog / ViewerPreferences }
+             { ViewClip } { /#1 }
+         }
+         {
+           \msg_warning:nnxx
+             {hyp}
+             {ignore-deprecated-or-unknown-option-in-pdf-version}
+             {pdfviewclip}
+             {\pdf_version:}
+         }
+     }%
+   ,pdfviewclip /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { ViewClip }
+     }
+   ,pdfviewclip / unknown .code:n =
+     {
+       \msg_warning:nnxxx { hyp } { unknown-choice+empty }
+         { pdfviewclip }
+         { MediaBox, CropBox, BleedBox, TrimBox, ArtBox }
+         { \exp_not:n {#1} }
+     }
+   ,pdfwindowui    .choice:
+   ,pdfwindowui / true .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } { HideWindowUI }
+     }
+   ,pdfwindowui / false .code:n =
+     {
+       \pdfmanagement_add:nnn {Catalog / ViewerPreferences }
+          { HideWindowUI } { true }
+     }
+   ,pdfwindowui /  .code:n =
+     {
+       \pdfmanagement_remove:nn {Catalog / ViewerPreferences } {HideWindowUI }
+     }
+   ,pdfwindowui / unknown .code:n =
+     {
+       \msg_warning:nnxx { hyp } { no-bool }
+         { pdfwindowui }
+         { \exp_not:n {#1} }
+     }
+   ,pdfwindowui    .default:n = true
+ }
+%    \end{macrocode}
+%
+% \begin{hypkey}{pdfview}
+% Destination keys. pdfview is a bit more complicated so extra.
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    ,pdfview .code:n =
+      {
+        \seq_set_split:Nnn \l_@@_tmpa_seq {~}{#1}
+        \str_case_e:nnF { \str_lowercase:f{ \seq_item:Nn \l_@@_tmpa_seq {1} } }
+           {
+             { xyz }
+               {
+                 \int_compare:nNnTF {\seq_count:N \l_@@_tmpa_seq } > { 1 }
+                   {
+                     \seq_get_right:NN \l_@@_tmpa_seq \l_@@_tmpa_tl
+                     \tl_if_eq:NnTF \l_@@_tmpa_tl {null}
+                       {
+                         \tl_set:Nn \l_@@_dest_pdfview_tl {xyz}
+                       }
+                       {
+                         \tl_set:Nx \l_@@_dest_pdfview_tl
+                            {
+                               \fp_eval:n { \l_@@_tmpa_tl * 100 }
+                            }
+                       }
+                   }
+                   {
+                     \tl_set:Nn \l_@@_dest_pdfview_tl {xyz}
+                   }
+               }
+             { fit }   { \tl_set:Nn \l_@@_dest_pdfview_tl {fit}  }
+             { fitb }  { \tl_set:Nn \l_@@_dest_pdfview_tl {fitb} }
+             { fitbh } { \tl_set:Nn \l_@@_dest_pdfview_tl {fitbh}}
+             { fitbv } { \tl_set:Nn \l_@@_dest_pdfview_tl {fitbv}}
+             { fith }  { \tl_set:Nn \l_@@_dest_pdfview_tl {fith} }
+             { fitv }  { \tl_set:Nn \l_@@_dest_pdfview_tl {fitv} }
+             { fitr }
+               {
+                 \int_compare:nNnTF {\seq_count:N \l_@@_tmpa_seq } = {1}
+                   {
+                     \tl_set:Nn \l_@@_dest_pdfview_tl {fitr}
+                   }
+                   {
+                      %ensure 4 values ...
+                     \tl_set:Nn \l_@@_dest_pdfview_tl {fitrbox}
+                     \seq_put_right:Nn \l_@@_tmpa_seq  {0}
+                     \seq_put_right:Nn \l_@@_tmpa_seq  {0}
+                     \seq_put_right:Nn \l_@@_tmpa_seq  {0}
+                     \hbox_set_to_wd:Nnn \l_@@_dest_box
+                       {
+                         \fp_eval:n
+                          {
+                            round
+                             (
+                               abs
+                                (
+                                  \seq_item:Nn\l_@@_tmpa_seq{4}
+                                  -
+                                  (\seq_item:Nn\l_@@_tmpa_seq{2})
+                                 ),
+                                3
+                             )
+                          }bp
+                       }{}
+                     \box_set_dp:Nn \l_@@_dest_box
+                       {
+                         \fp_eval:n
+                           {
+                             round(0 - (\seq_item:Nn\l_@@_tmpa_seq{3}),3)
+                           }bp
+                       }
+                     \box_set_ht:Nn \l_@@_dest_box
+                       {
+                         \seq_item:Nn\l_@@_tmpa_seq{5}bp
+                       }
+                   }
+               }
+           }
+           {
+              \msg_warning:nnnn {hyp}{invalid-destination-value}{#1}{pdfview}
+              \tl_set:Nn \l_@@_dest_pdfview_tl {fit}
+           }
+      }
+    ,pdfview .initial:n  = {xyz}
+  }
+%    \end{macrocode}
+% \end{hypkey}
+%\subsection{\enquote{MetaData keys}}
+% The following keys are relevant for the metadata: the info dictionary and
+% the xmp-metadata.
+% \begin{hypkey}{pdflang}
+% |pdflang| should be deprecated.
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+   ,pdflang       .code:n =
+          {
+            \tl_if_empty:nTF { #1 }
+              {
+                \pdfmanagement_remove:nn {Catalog} { Lang }
+              }
+              {
+                \pdfmanagement_add:nnx {Catalog} { Lang } { (#1) }
+              }
+            \@@_store_metadata:nn {pdflang}{#1}
+          }
+   }
+%    \end{macrocode}
+% \end{hypkey}
+%
+% \subsubsection{\enquote{info keys}}
+% \begin{hypkey}{pdfauthor,pdftitle,pdfcreator,pdfsubject,pdfproducer,pdfkeywords}
+% The keys store their value also in the metadate container, so that hyperxmp can
+% use them.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_setup_info_key:nn #1 #2
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        pdf#1  .code:n =
+          {
+            \tl_if_blank:nTF {##1}
+              {
+                \pdfmanagement_remove:nn {Info}{#2}
+              }
+              {
+                \@@_text_pdfstring_info:nN {##1}\l_@@_tmpa_str
+                \str_if_eq:VnF\l_@@_tmpa_str{<FEFF>}
+                  {
+                    \pdfmanagement_add:nnx {Info}{#2}{\l_@@_tmpa_str}
+                  }
+              }
+             \@@_store_metadata:nn {pdf#1}{##1}
+          }
+      }
+    \keys_define:nn { hyp / info }
+      {
+        #2  .code:n =
+          {
+            \tl_if_blank:nTF {##1}
+              {
+                \pdfmanagement_remove:nn {Info}{#2}
+              }
+              {
+                \@@_text_pdfstring_info:nN {##1}\l_@@_tmpa_str
+                \str_if_eq:VnF\l_@@_tmpa_str{<FEFF>}
+                  {
+                    \pdfmanagement_add:nnx {Info}{#2}{\l_@@_tmpa_str}
+                  }
+              }
+            \exp_args:Nx \@@_store_metadata:nn {pdf\str_lowercase:n{#1}}{##1}
+          }
+        ,unknown .code:n =
+         {
+            \@@_text_pdfstring_info:nN {##1}\l_@@_tmpa_str
+            \str_if_eq:VnF\l_@@_tmpa_str{<FEFF>}
+              {
+                \exp_args:Nno
+                \pdfmanagement_add:nnx {Info}
+                    { \l_keys_key_str } {\l_@@_tmpa_str}
+              }
+         }
+      }
+  }
+\@@_setup_info_key:nn {author}   {Author}
+\@@_setup_info_key:nn {title}    {Title}
+\@@_setup_info_key:nn {producer} {Producer}
+\@@_setup_info_key:nn {creator}  {Creator}
+% ignored key: addtopdfcreator
+\@@_setup_info_key:nn {subject}  {Subject}
+\@@_setup_info_key:nn {keywords}  {Keywords}
+%    \end{macrocode}
+% \end{hypkey}
+% \begin{hypkey}{pdfcreationdate,pdfmoddate}
+% These keys are not really needed. We store them too in the container.
+% CreationDate and ModDate should not use the hex encoding.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_setup_info_date_key:nn #1 #2
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        pdf#1  .code:n =
+          {
+            \tl_if_blank:nTF {##1}
+              {
+                \pdfmanagement_remove:nn {Info}{#2}
+              }
+              {
+                \pdfmanagement_add:nnx {Info}{#2}{(\tl_to_str:n {##1})}
+              }
+             \@@_store_metadata:nn {pdf#1}{##1}
+          }
+      }
+    \keys_define:nn { hyp / info }
+      {
+        #2  .code:n =
+          {
+            \tl_if_blank:nTF {##1}
+              {
+                \pdfmanagement_remove:nn {Info}{#2}
+              }
+              {
+                \pdfmanagement_add:nnx {Info}{#2}{(\tl_to_str:n {##1})}
+              }
+            \exp_args:Nx \@@_store_metadata:nn {pdf\str_lowercase:n{#1}}{##1}
+          }
+      }
+  }
+
+\@@_setup_info_date_key:nn {creationdate}  {CreationDate}
+\@@_setup_info_date_key:nn {moddate}  {ModDate}
+%    \end{macrocode}
+% \end{hypkey}
+% \begin{hypkey}{pdftrapped}
+% Trapped is a bit curious, it has an value "unknown", and one can't suppress it ...
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    ,pdftrapped .code:n =
+      {
+        \exp_args:Nne
+          \keys_set:nn { hyp / setup } { _pdftrapped = \str_uppercase:n { #1 } }
+      }
+    ,_pdftrapped  .choices:nn = {TRUE,FALSE,UNKNOWN}
+       {
+         \pdfmanagement_add:nnx {Info}{Trapped}
+           {/
+             \str_uppercase:f { \str_head:n { #1 } }
+             \str_lowercase:f { \str_tail:n { #1 } }
+           }
+         \@@_store_metadata:nx {pdftrapped}
+           {
+             \str_uppercase:f { \str_head:n { #1 } }
+             \str_lowercase:f { \str_tail:n { #1 } }
+           }
+       }
+    ,_pdftrapped / unknown .code:n =
+       {
+         \msg_warning:nnxxx { hyp } { unknown-choice }
+           { pdftrapped }
+           { true~(case~insensitive), false~(case~insensitive), unknown~(case~insensitive) }
+           { \exp_not:n {#1} }
+       }
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% \begin{hypkey}{pdfinfo}
+%  pdfinfo allows to set the info keys with keyval ...
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    pdfinfo .code:n =
+      {
+        \keys_set:nn { hyp / info } { #1 }
+      }
+  }
+%    \end{macrocode}
+% \end{hypkey}
+% Now we set some default values
+%    \begin{macrocode}
+\keys_set:nn { hyp / setup} {pdfcreator = LaTeX~with~hyperref}
+\keys_set:nn { hyp / setup} {pdfauthor  = }
+\keys_set:nn { hyp / setup} {pdftitle   = }
+\keys_set:nn { hyp / setup} {pdfsubject  = }
+%    \end{macrocode}
+%
+% \subsection{hyperxmp keys}
+% hyperxmp defines lots of keys for \cs{hypersetup}.
+% They now longer work with this driver. So we provide them,
+% but they are only stored as metadata:
+%    \begin{macrocode}
+\clist_map_inline:nn
+  {
+   ,pdfcopyright
+   ,pdftype
+   ,pdflicenseurl
+   ,pdfauthortitle
+   ,pdfcaptionwriter
+   ,pdfmetalang
+   ,pdfapart
+   ,pdfaconformance
+   ,pdfuapart
+   ,pdfxstandard
+   ,pdfsource
+   ,pdfdocumentid
+   ,pdfinstanceid
+   ,pdfversionid
+   ,pdfrendition
+   ,pdfpublication
+   ,pdfpubtype
+   ,pdfbytes
+   ,pdfnumpages
+   ,pdfissn
+   ,pdfeissn
+   ,pdfisbn
+   ,pdfbookedition
+   ,pdfpublisher
+   ,pdfvolumenum
+   ,pdfissuenum
+   ,pdfpagerange
+   ,pdfdoi
+   ,pdfurl
+   ,pdfidentifier
+   ,pdfsubtitle
+   ,pdfpubstatus
+   ,pdfcontactaddress
+   ,pdfcontactcity
+   ,pdfcontactregion
+   ,pdfcontactpostcode
+   ,pdfcontactcountry
+   ,pdfcontactphone
+   ,pdfcontactemail
+   ,pdfcontacturl
+   ,pdfdate
+  }
+  {
+    \keys_define:nn { hyp / setup }
+      {
+        #1 .code:n= { \@@_store_metadata:nn {#1}{##1}}
+      }
+  }
+%    \end{macrocode}
+%
+% \subsection{Transitions}
+%  pdfpageduration sets the duration a page is shown in full screen mode.
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    pdfpageduration .code:n =
+     {
+        \tl_if_blank:nTF { #1 }
+          {
+            \pdfmanagement_remove:nn {Page}{Dur}
+          }
+          {
+            \pdfmanagement_add:nnn {Page}{Dur}{#1}
+          }
+     }
+  }
+%    \end{macrocode}
+% Transition settings are used by (some) pdf viewers when presenting a
+% pdf in full screen mode. They are added to the page settings and describe the
+% transition from the previous page to current page. Transition setting can be
+% set in the preamble for all pages or in the document for the current and the
+% following pages. Due to the asynchronous page breaking one has to be careful
+% to set it on the right page, e.g. only after a |\newpage|.
+% The generic driver uses a different syntax than the other hyperref drivers:
+% various transition options can be set by a keyval syntax in the value of
+% |pdfpagetransition|. A typical setting looks e.g. like this\\
+% |\hypersetup{pdfpagetransition={style=Fly,duration=2,direction=90,opaque=false}}|
+%
+% The keys allowed in the argument of |pdfpagetransition| are
+% \begin{tabular}{l>{\raggedright\arraybackslash}p{6cm}}
+% style    &  one of Split, Blinds, Box, Wipe, Dissolve, Glitter, R, Fly, Push, Cover, Uncover, Fade\\
+% duration &  a number, describes the duration of the transition\\
+% direction& \begin{tabular}[t]{l}
+%             H~(horizontal,~only~Split,~Blinds)\\
+%             V~(vertical,~only~Split,~Blinds)\\
+%             0~(left~to~right,~only~Wipe,~Glitter,~Fly,~Cover,~Uncover,~Push)\\
+%             90~(bottom~to~top,~only~Wipe)\\
+%             180~(right~to~left,~only~Wipe)\\
+%             270~(top~to~bottom,~only~Wipe,~Glitter,~Fly,~Cover,~Uncover,~Push)\\
+%             315~(top~left~to~bottom,~only~Glitter)\\
+%             None~(only~Fly)
+%             \end{tabular}\\
+% motion   & one of I, O, only relevant for Split, Box and Fly\\
+% scale    & a number, only relevant for Fly style \\
+% opaque   & true or false, only relevant for Fly style
+% \end{tabular}
+%    \begin{macrocode}
+\keys_define:nn { hyp / setup }
+  {
+    pdfpagetransition .code:n =
+     {
+       \tl_if_blank:nTF {#1}
+         {
+           \pdfmanagement_remove:nn {Page}{Trans}
+         }
+         {
+           \group_begin:
+           \keys_set:nn { hyp / trans }{style=R,#1}
+           \pdf_object_unnamed_write:nx { dict }
+             {
+               \pdfdict_use:n {l_@@_page/Trans}
+             }
+           \pdfmanagement_add:nnx {Page}{Trans}{\pdf_object_ref_last:}
+           \group_end:
+         }
+     }
+  }
+\keys_define:nn { hyp / trans }
+  {
+    ,style .choices:nn =
+      {Split,Blinds,Box,Wipe,Dissolve,Glitter,R,Fly,Push,Cover,Uncover,Fade}
+      { \pdfdict_put:nnn {l_@@_page/Trans}{ S }{/#1} }
+    ,style / unknown .code:n =
+      {
+        \msg_warning:nnxxx { hyp } { unknown-choice }
+           { trans / style }
+           { Split,Blinds,Box,Wipe,Dissolve,Glitter,R,Fly,Push,Cover,Uncover,Fade }
+           { \exp_not:n {#1} }
+      }
+    ,duration .code:n  =
+      {
+        \pdfdict_put:nnn {l_@@_page/Trans}{ D }{#1}
+      }
+    ,direction .choices:nn =
+      {H,V}
+      { \pdfdict_put:nnn {l_@@_page/Trans}{ S }{/#1} }
+    ,direction .choices:nn =
+      {0,90,180,270,315}
+      { \pdfdict_put:nnn {l_@@_page/Trans}{ DI }{ #1 } }
+    ,direction / None .code:n =
+      { \pdfdict_put:nnn {l_@@_page/Trans}{ DI }{ /None } }
+    ,direction / unknown .code:n =
+      {
+        \msg_warning:nnxxx { hyp } { unknown-choice }
+           { trans / direction }
+           {
+             H~(horizontal,~only~Split,~Blinds),
+             V~(vertical,~only~Split,~Blinds),
+             0~(left~to~right,~only~Wipe,~Glitter,~Fly,~Cover,~Uncover,~Push),
+             90~(bottom~to~top,~only~Wipe),
+             180~(right~to~left,~only~Wipe),
+             270~(top~to~bottom,~only~Wipe,~Glitter,~Fly,~Cover,~Uncover,~Push),
+             315~(top~left~to~bottom,~only~Glitter),
+             None~(only~Fly)
+           }
+           { \exp_not:n {#1} }
+      }
+    ,motion .choices:nn =
+     {I,O}
+     { \pdfdict_put:nnn {l_@@_page/Trans}{ M }{/#1} }
+    ,motion / unknown .code:n =
+      {
+        \msg_warning:nnxxx { hyp } { unknown-choice }
+           { trans / motion }
+           { I~(inwards) , O~(outwards) }
+           { \exp_not:n {#1} }
+      }
+     ,scale .code:n =
+       { \pdfdict_put:nnn { l_@@_page/Trans }{ SS }{ #1 } }
+     ,opaque .choices:nn = {true,false}
+       { \pdfdict_put:nnn { l_@@_page/Trans }{ B } { #1} }
+     ,opaque / unknown .code:n =
+       {
+          \msg_warning:nnxxx { hyp } { unknown-choice }
+           { trans / B }
+           { true~(opaque~back,~only~Fly), false~(opaque~back,~only~Fly) }
+           { \exp_not:n {#1} }
+       }
+     % try to set unknown keys as style
+     ,unknown .code:n =
+       {
+         % warning ...
+         \exp_args:Nnx\keys_set:nn {hyp/trans}{ style=\l_keys_key_str }
+       }
+  }
+%    \end{macrocode}
+%
+% Finally we process the package option list, to get most keys working
+%    \begin{macrocode}
+\keys_set_known:nv{hyp/setup}{opt@hyperref.sty}
+%    \end{macrocode}
+%
+%  Unfinished
+%% Form field code
+%    \begin{macrocode}
+\NewDocumentCommand \MakeFieldObject { m m }
+  {
+    \pdfxform_new:nnn { #2 }{} { #1 }
+  }
+
+
+\prop_new:N   \g_@@_AcroForm_CoFields_prop
+\prop_new:N   \g_@@_AcroForm_Fields_prop
+
+\let\HyField@afields\ltx@empty
+\let\HyField@cofields\ltx@empty
+%% UF test for old pdftex removed
+%\let\HyField@AuxAddToFields\ltx@gobble
+%\let\HyField@AuxAddToCoFields\ltx@gobbletwo
+\def\HyField@AfterAuxOpen{\Hy@AtBeginDocument}%
+
+% the value doesn't matter, but with a prop we avoid duplicates and it is
+% clearly faster than removing them from a sequence
+\def\HyField@AuxAddToFields#1
+  {
+    \prop_gput:Nnn \g__hyp_AcroForm_Fields_prop {#1}{F}
+  }%
+
+%fields with empty key get a value too -- lets hope that
+%this give the expected behaviour
+\def\HyField@AuxAddToCoFields #1 #2
+  {
+    \prop_gput:Nnn \g__hyp_AcroForm_CoFields_prop {a#1}{#2}
+  }
+
+\Hy@AtBeginDocument
+  {
+    \if@filesw
+      \immediate\write\@mainaux{%
+        \string\providecommand\string\HyField@AuxAddToFields[1]{}%
+       }%
+      \immediate\write\@mainaux{%
+        \string\providecommand\string\HyField@AuxAddToCoFields[2]{}%
+      }%
+    \fi
+    \let\HyField@AfterAuxOpen\@firstofone
+  }%
+
+\def\HyField@AddToFields
+  {
+    \exp_args:Nx\HyField@@AddToFields
+      {
+        \pdfannot_box_ref_last:
+      }
+    \ifx\Fld@calculate@code\ltx@empty
+    \else
+      \begingroup
+        \Hy@safe@activestrue
+        \edef\Hy@temp{%
+          \endgroup
+          \if@filesw
+            \write\@mainaux
+             {
+              \string\HyField@AuxAddToCoFields
+               {
+                \Fld@calculate@sortkey
+               }
+               {
+                 \pdfannot_box_ref_last:
+               }
+            }
+          \fi
+        }%
+      \Hy@temp
+    \fi
+  }%
+
+\def\HyField@@AddToFields#1{
+  \HyField@AfterAuxOpen{%
+    \if@filesw
+      \write\@mainaux{%
+        \string\HyField@AuxAddToFields{#1}%
+        }%
+      \fi
+    }%
+  }%
+
+\ExplSyntaxOff
+\ExplSyntaxOn
+\tl_new:N  \l_@@_CheckmarkYes_tl
+\tl_set:Nn \l_@@_CheckmarkYes_tl {  __hyp_xform_CheckMarkYes }
+\tl_new:N  \l_@@_CheckmarkOff_tl
+\tl_set:Nn \l_@@_CheckmarkOff_tl {  __hyp_xform_CheckMarkOff }
+
+\def\@Form[#1]
+  {
+    \@ifundefined{textcolor}{\let\textcolor\@gobble}{}
+    \kvsetkeys{Form}{#1}
+    \pdf@ifdraftmode{}
+      {
+        \Hy@FormObjects
+        \prop_map_inline:Nn \g__hyp_AcroForm_Fields_prop
+          {
+            \pdfmanagement_add:nnx { Catalog / AcroForm } { Fields }{##1}
+            %\pdfmanagement_show:n { Catalog / AcroForm }
+          }
+        \prop_if_empty:NF \g__hyp_AcroForm_CoFields_prop
+          {
+            \prop_map_inline:Nn \g__hyp_AcroForm_CoFields_prop
+              {
+                \seq_put_right:Nn \l_@@_tmpa_seq {##1}
+              }
+            \seq_sort:Nn \l_@@_tmpa_seq
+              {
+                \int_compare:nNnTF { \pdf@strcmp{##1}{##2} } > { 0 }
+                  { \sort_return_swapped: }
+                  { \sort_return_same: }
+              }
+            \seq_map_inline:Nn \l_@@_tmpa_seq
+             {
+                \pdfmanagement_add:nnx { Catalog / AcroForm }
+                  { CO }
+                  {
+                    \prop_item:Nn \g__hyp_AcroForm_CoFields_prop {##1}
+                  }
+             }
+          }
+       \pdfmanagement_add:nnx {Catalog / AcroForm/DR/Font }
+         {ZaDb} {\pdf_object_ref:n {l_@@_font_zapfdingbats_obj} }
+       \pdfmanagement_add:nnx {Catalog / AcroForm/DR/Font }
+         {Helv} {\pdf_object_ref:n {l_@@_font_helvetica_obj} }
+       \pdfmanagement_add:nnx {Catalog /AcroForm}
+         {DA}{(/Helv~10~Tf~0~g)}
+       \pdfmeta_standard_verify:nTF {form_no_NeedAppearance}
+         {
+           \legacy_if:nT { HyField@NeedAppearances }
+             {
+               \pdfmanagement_add:nnn {Catalog / AcroForm }{NeedAppearances}{true}
+             }
+         }
+         {
+           \pdfmanagement_remove:nn {Catalog / AcroForm }{NeedAppearances}
+         }
+       }
+     \MakeFieldObject
+       {
+         \group_begin:
+         \fontfamily{pzd}
+         \fontencoding{U}
+         \fontseries{m}
+         \fontshape{n}
+         \selectfont
+         \char123
+         \group_end:
+       }
+       {__hyp_xform_Ding}
+    \MakeFieldObject
+       {
+         \group_begin:
+         \fontfamily{pzd}
+         \fontencoding{U}
+         \fontseries{m}
+         \fontshape{n}
+         \selectfont
+         \phantom{\char123}
+         \group_end:
+       }
+       {__hyp_xform_DingOff}
+     \MakeFieldObject
+       {
+         \group_begin:
+         \fontfamily{pzd}
+         \fontencoding{U}
+         \fontseries{m}
+         \fontshape{n}
+         \selectfont
+         \char51
+         \group_end:
+       }
+       {__hyp_xform_CheckMarkYes}
+     \MakeFieldObject
+       {
+        \group_begin:
+         \fontfamily{pzd}
+         \fontencoding{U}
+         \fontseries{m}
+         \fontshape{n}
+         \selectfont
+         \phantom{\char51} %perhaps xetex needs some small glyph ..
+         \group_end:
+       }
+       {__hyp_xform_CheckMarkOff}
+     \MakeFieldObject
+       {
+         \fbox{\textcolor{yellow}{\textsf{Submit}}} %color?
+       }
+       {__hyp_xform_Submit}
+     \MakeFieldObject
+       {
+         \fbox{\textcolor{yellow}{\textsf{SubmitP}}} %color?
+       }
+       {__hyp_xform_SubmitP}
+  }
+\ExplSyntaxOff
+\let\@endForm\ltx@empty
+\let\HyAnn@AbsPageLabel\ltx@empty
+\let\Fld@pageobjref\ltx@empty
+
+\ExplSyntaxOn
+\newcount\HyAnn@Count
+\HyAnn@Count=\ltx@zero
+\def\HyAnn@AbsPageLabel
+  {
+    \global\advance\HyAnn@Count by\ltx@one
+    %\zref@labelbyprops{HyAnn@\the\HyAnn@Count}{abspage}%
+    %\zref@labelbylist {HyAnn@\the\HyAnn@Count} {l3pdf}
+    %\zref@refused{HyAnn@\the\HyAnn@Count}%
+    \__hyp_ref_label:en {HyAnn@\the\HyAnn@Count}{abspage}
+    \__hyp_ref_check:en {HyAnn@\the\HyAnn@Count}{abspage}
+  }%
+\def\Fld@pageobjref
+  {
+    \__hyp_ref_if_exist:enT {HyAnn@\the\HyAnn@Count}{abspage}
+      {
+        /P~\pdf_pageobject_ref:n
+          {
+            \__hyp_ref_value:en{HyAnn@\the\HyAnn@Count}{abspage}
+          }
+      }
+  }
+\ExplSyntaxOff
+\ExplSyntaxOn
+%% check if the attr should be set through
+%% hooks.
+%% check if options are missing.
+\def\@TextField[#1]#2{% parameters, label
+  \def\Fld@name{#2}%
+  \let\Fld@default\ltx@empty
+  \let\Fld@value\@empty
+  \def\Fld@width{\DefaultWidthofText}%
+  \def\Fld@height{%
+    \ifFld@multiline
+      \DefaultHeightofTextMultiline
+    \else
+      \DefaultHeightofText
+    \fi
+  }%
+  \begingroup
+    \expandafter\HyField@SetKeys\expandafter{%
+      \DefaultOptionsofText,#1%
+    }%
+    \PDFForm@Name
+    \HyField@FlagsText
+    \ifFld@hidden\def\Fld@width{1sp}\fi
+    \ifx\Fld@value\@empty\def\Fld@value{\Fld@default}\fi
+    \LayoutTextField{#2}{%
+      \leavevmode
+      \HyAnn@AbsPageLabel
+      \Hy@escapeform\PDFForm@Text
+      \pdfannot_box:nnnn
+          {\Fld@width}
+          {\Fld@height}
+          {0pt} %is this correct?
+          {\PDFForm@Text}
+      \MakeTextField{\Fld@width}{\Fld@height}
+      \HyField@AddToFields
+    }%
+  \endgroup
+}
+\providecommand\@curropt{}
+\def\@ChoiceMenu[#1]#2#3{% parameters, label, choices
+  \def\Fld@name{#2}
+  \let\Fld@default\relax
+  \let\Fld@value\relax
+  \def\Fld@width{\DefaultWidthofChoiceMenu}
+  \def\Fld@height{\DefaultHeightofChoiceMenu}
+  \begingroup
+    \Fld@menulength=0 %
+    \@tempdima\z@
+    \clist_map_variable:nNn { #3 } \@curropt
+    %\@for\@curropt:=#3\do
+      {%
+        \expandafter\Fld@checkequals\@curropt==\\%
+        \Hy@StepCount\Fld@menulength
+        \settowidth{\@tempdimb}{\@currDisplay}%
+        \ifdim\@tempdimb>\@tempdima\@tempdima\@tempdimb\fi
+      }%
+    \advance\@tempdima by~15\p@
+    \begingroup
+      \HyField@SetKeys{#1}
+    \edef\x{\endgroup
+      \noexpand\expandafter
+      \noexpand\HyField@SetKeys
+      \noexpand\expandafter{%
+        \expandafter\noexpand\csname DefaultOptionsof%
+          \ifFld@radio
+            Radio%
+          \else
+            \ifFld@combo
+              \ifFld@popdown
+                PopdownBox%
+              \else
+                ComboBox%
+              \fi
+            \else
+              ListBox%
+            \fi
+          \fi
+        \endcsname
+      }%
+    }\x
+    \HyField@SetKeys{#1}%
+    \PDFForm@Name
+    \ifFld@hidden\def\Fld@width{1sp}\fi
+    \ifx\Fld@value\relax
+      \let\Fld@value\Fld@default
+    \fi
+    \LayoutChoiceField{#2}{%
+      \ifFld@radio
+        \HyField@FlagsRadioButton
+        \@@Radio{#3}%
+      \else
+        \begingroup
+          \HyField@FlagsChoice
+          \ifdim\Fld@width<\@tempdima
+            \ifdim\@tempdima<1cm\@tempdima1cm\fi
+            \edef\Fld@width{\the\@tempdima}%
+          \fi
+          \ifFld@combo
+          \else
+            \@tempdima=\the\Fld@menulength\Fld@charsize
+            \advance\@tempdima by~\Fld@borderwidth bp %
+            \advance\@tempdima by~\Fld@borderwidth bp %
+            \edef\Fld@height{\the\@tempdima}%
+          \fi
+          \@@Listbox{#3}%
+        \endgroup
+      \fi
+    }%
+  \endgroup
+}
+\tl_new:N  \l_@@_RadioYes_tl
+\tl_set:Nn \l_@@_RadioYes_tl { __hyp_xform_Ding }
+\def\@@Radio#1{%
+  \Fld@listcount=0~%
+  %\show\Fld@default
+  \EdefEscapeName\Fld@default{\Fld@default}%
+  \clist_map_variable:nNn { #1 } \@curropt
+  %\@for\@curropt:=#1\do
+   {%
+    \expandafter\Fld@checkequals\@curropt==\\%
+    \EdefEscapeName\@currValue{\@currValue}%
+    \Hy@StepCount\Fld@listcount
+    \@currDisplay\space
+    \leavevmode
+    \HyAnn@AbsPageLabel
+    \Hy@escapeform\PDFForm@Radio
+    \pdfannot_box:nnnn
+      {\Fld@width}
+      {\Fld@height}
+      {0pt} %is this correct?
+      {
+        \PDFForm@Radio
+        /AP
+         <<
+         /N
+          <<
+          /\@currValue\c_space_tl \pdfxform_ref:o {__hyp_xform_Ding}
+          %/Off \c_space_tl \pdfxform_ref:n {__hyp_xform_DingOff} %hm
+          >>
+         >>
+      }
+      {\fbox{  \MakeRadioField{\Fld@width}{\Fld@height}} }
+     \int_compare:nNnT { \Fld@listcount} = { 1 }
+      { \HyField@AddToFields }
+    \c_space_tl % deliberate space between radio buttons
+                % to do: --> should be configurable
+  }%
+}
+
+\newcount\Fld@listcount
+\def\@@Listbox#1
+ {
+  \HyField@PDFChoices{#1}
+  \mode_leave_vertical:
+  \HyAnn@AbsPageLabel
+  \Hy@escapeform\PDFForm@List
+  \pdf_link_user:nnn
+       {widget} %perhaps we need more types??
+       {\PDFForm@List}
+       {\MakeChoiceField{\Fld@width}{\Fld@height}}
+  \HyField@AddToFields
+ }
+
+
+\def\@PushButton[#1]#2{% parameters, label
+  \def\Fld@name{#2}%
+  \group_begin:
+    \exp_args:No\HyField@SetKeys
+     {
+      \DefaultOptionsofPushButton,#1
+     }
+    \PDFForm@Name
+    \pdfmeta_standard_verify:nnTF {annot_action_A}{JavaScript}
+      {
+        \HyField@FlagsPushButton
+        \legacy_if:nT {Fld@hidden}
+          {
+            \def\Fld@width{1sp}
+          }
+        \LayoutPushButtonField
+          {
+            \mode_leave_vertical:
+            \HyAnn@AbsPageLabel
+            \Hy@escapeform\PDFForm@Push
+            \hbox_set:Nn \l_tmpa_box { \MakeButtonField {#2}}
+            \pdfannot_box:nnnn
+              {\box_wd:N\l_tmpa_box}
+              {\box_ht:N\l_tmpa_box}
+              {\box_dp:N\l_tmpa_box} %is this correct?
+              {\PDFForm@Push}
+             {\box_use:N\l_tmpa_box}
+            \HyField@AddToFields
+          }
+      }
+      {
+        \msg_error:nn { hyp }{ pdfa-no-push-button }
+        \LayoutPushButtonField
+          {
+            \mode_leave_vertical:
+            \MakeButtonField{#2}
+          }
+      }
+  \group_end:
+}
+
+\def\@Submit[#1]#2
+ {
+   \def\Fld@width {\DefaultWidthofSubmit}
+   \def\Fld@height{\DefaultHeightofSubmit}
+   \group_begin:
+     \exp_args:No\HyField@SetKeys
+       {
+         \DefaultOptionsofSubmit,#1
+       }
+   \HyField@FlagsPushButton
+   \HyField@FlagsSubmit
+   \legacy_if:nT { Fld@hidden }
+     {
+       \def\Fld@width{1sp}
+     }
+    \mode_leave_vertical:
+    \HyAnn@AbsPageLabel
+    \Hy@escapeform\PDFForm@Submit
+    \hbox_set:Nn \l_tmpa_box { \MakeButtonField {#2}}
+    \pdfannot_box:nnnn
+      {\box_wd:N\l_tmpa_box}
+      {\box_ht:N\l_tmpa_box}
+      {\box_dp:N\l_tmpa_box} %is this correct?
+      {
+        \PDFForm@Submit
+        /AP<<
+          /N~\pdfxform_ref:n {__hyp_xform_Submit}~
+          /D~\pdfxform_ref:n {__hyp_xform_SubmitP}
+         >>
+       }
+      \HyField@AddToFields
+      \box_use:N\l_tmpa_box
+
+    \group_end:
+ }
+
+\def\@Reset[#1]#2
+ {
+   \def\Fld@width {\DefaultWidthofReset}
+   \def\Fld@height{\DefaultHeightofReset}
+   \group_begin:
+     \exp_args:No\HyField@SetKeys
+       {
+         \DefaultOptionsofReset,#1
+       }
+     \mode_leave_vertical:
+     \pdfmeta_standard_verify:nnTF {annot_action_A}{ResetForm}
+       {
+         \HyField@FlagsPushButton
+         \legacy_if:nT { Fld@hidden }
+           { \def\Fld@width{1sp} }
+         \HyAnn@AbsPageLabel
+         \Hy@escapeform\PDFForm@Reset
+         \hbox_set:Nn \l_tmpa_box { \MakeButtonField {#2}}
+         \pdfannot_box:nnnn
+           {\box_wd:N\l_tmpa_box}
+           {\box_ht:N\l_tmpa_box}
+           {\box_dp:N\l_tmpa_box} %is this correct?
+           { \PDFForm@Reset }
+         \HyField@AddToFields
+         \box_use:N \l_tmpa_box
+       }
+       {
+         \msg_error:nn { hyp }{ pdfa-no-reset-button }
+         \MakeButtonField{#2}
+       }
+    \group_end:
+  }
+
+\def\@CheckBox[#1]#2
+  {% parameters, label
+    \def\Fld@name{#2}
+    \def\Fld@default{0}
+    \group_begin:
+      \def\Fld@width {\DefaultWidthofCheckBox}
+      \def\Fld@height{\DefaultHeightofCheckBox}
+      \exp_args:No\HyField@SetKeys
+        {
+          \DefaultOptionsofCheckBox,#1
+        }
+      \PDFForm@Name
+      \HyField@FlagsCheckBox
+      \legacy_if:nT { Fld@hidden }
+        {
+          \def\Fld@width{1sp}
+        }
+      \LayoutCheckField{#2}
+        {
+          \mode_leave_vertical:
+          \HyAnn@AbsPageLabel
+          \Hy@escapeform\PDFForm@Check
+          \pdfannot_box:nnnn
+            {\Fld@width}
+            {\Fld@height}
+            {0pt} %is this correct?
+            {\PDFForm@Check}
+          \HyField@AddToFields %check if this works with xelatex ...
+        }
+    \group_end:
+  }
+\ExplSyntaxOff
+
+%hm. Should a luatex driver use type1 fonts in fields????
+\ExplSyntaxOn
+\def\Hy@FormObjects
+  {
+    \pdf_object_new:nn   {l_@@_encoding_pdfdoc_obj }   { dict }
+    \pdf_object_new:nn   {l_@@_font_zapfdingbats_obj } { dict }
+    \pdf_object_new:nn   {l_@@_font_helvetica_obj }    { dict }
+    \pdf_object_write:nx {l_@@_encoding_pdfdoc_obj }
+      {
+        /Type/Encoding
+        /Differences[
+          24/breve/caron/circumflex/dotaccent/hungarumlaut/ogonek
+          /ring/tilde
+          \c_space_tl
+          39/quotesingle
+          \c_space_tl
+          96/grave %
+          \iow_newline:
+          128/bullet/dagger/daggerdbl/ellipsis/emdash/endash/florin
+          /fraction/guilsinglleft/guilsinglright/minus/perthousand
+          /quotedblbase/quotedblleft/quotedblright/quoteleft
+          /quoteright/quotesinglbase/trademark/fi/fl/Lslash/OE
+          /Scaron/Ydieresis/Zcaron/dotlessi/lslash/oe/scaron/zcaron
+          \iow_newline:
+          164/currency
+          \c_space_tl
+          166/brokenbar
+          \c_space_tl
+          168/dieresis/copyright/ordfeminine
+          \c_space_tl
+          172/logicalnot/.notdef/registered/macron/degree/plusminus
+          /twosuperior/threesuperior/acute/mu
+          \c_space_tl
+          183/periodcentered/cedilla/onesuperior/ordmasculine
+          \c_space_tl
+          188/onequarter/onehalf/threequarters
+          \iow_newline:
+          192/Agrave/Aacute/Acircumflex/Atilde/Adieresis/Aring/AE
+          /Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave
+          /Iacute/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute
+          /Ocircumflex/Otilde/Odieresis/multiply/Oslash/Ugrave
+          /Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls
+          /agrave/aacute/acircumflex/atilde/adieresis/aring/ae
+          /ccedilla/egrave/eacute/ecircumflex/edieresis/igrave
+          /iacute/icircumflex/idieresis/eth/ntilde/ograve/oacute
+          /ocircumflex/otilde/odieresis/divide/oslash/ugrave
+          /uacute/ucircumflex/udieresis/yacute/thorn/ydieresis
+         ]
+      }
+    \pdf_object_write:nn {l_@@_font_zapfdingbats_obj }
+      {
+        /Type/Font
+        /Subtype/Type1
+        /Name/ZaDb
+        /BaseFont/ZapfDingbats
+      }
+    \pdf_object_write:nx {l_@@_font_helvetica_obj }
+      {
+        /Type/Font
+        /Subtype/Type1
+        /Name/Helv
+        /BaseFont/Helvetica
+        /Encoding~\pdf_object_ref:n { l_@@_encoding_pdfdoc_obj }
+      }
+  \global\let\Hy@FormObjects\relax
+  }
+\ExplSyntaxOff
+\providecommand*{\Fld@pageobjref}{}
+\ifcsname pdf@escapestring\endcsname
+  \def\Hy@escapeform#1{%
+    \ifHy@pdfescapeform
+      \let\Hy@escapestring\pdfescapestring
+    \else
+      \let\Hy@escapestring\@firstofone
+    \fi
+  }%
+  \Hy@escapeform{}%
+\else
+  \let\Hy@escapestring\@firstofone
+  \def\Hy@escapeform#1{%
+    \ifHy@pdfescapeform
+      \def\Hy@escapestring##1{%
+        \noexpand\Hy@escapestring{\noexpand##1}%
+      }%
+      \edef\Hy@temp{#1}%
+      \expandafter\Hy@@escapeform\Hy@temp\Hy@escapestring{}\@nil
+      \def\Hy@escapestring##1{%
+        \@ifundefined{Hy@esc@\string##1}{%
+          ##1%
+          \ThisShouldNotHappen
+        }{%
+          \csname Hy@esc@\string##1\endcsname
+        }%
+      }%
+    \else
+      \let\Hy@escapestring\@firstofone
+    \fi
+  }%
+  \def\Hy@@escapeform#1\Hy@escapestring#2#3\@nil{%
+    \ifx\\#3\\%
+    \else
+      \expandafter
+      \Hy@pstringdef\csname Hy@esc@\string#2\endcsname{#2}% probably string-hex
+      \ltx@ReturnAfterFi{%
+        \Hy@@escapeform#3\@nil
+      }%
+    \fi
+  }%
+\fi
+\def\PDFForm@Name{%
+  \PDFForm@@Name\Fld@name
+  \ifx\Fld@altname\relax
+  \else
+    \PDFForm@@Name\Fld@altname
+  \fi
+  \ifx\Fld@mappingname\relax
+  \else
+    \PDFForm@@Name\Fld@mappingname
+  \fi
+}
+\def\PDFForm@@Name#1{%
+  \begingroup
+    \ifnum\Hy@pdfversion<5 % implementation note 117, PDF spec 1.7
+      \ifHy@unicode
+        \Hy@unicodefalse
+      \fi
+    \fi
+    \pdfstringdef\Hy@gtemp#1%
+  \endgroup
+  \let#1\Hy@gtemp
+}
+\def\Fld@X@additionalactions{%
+  \ifx\Fld@keystroke@code\@empty
+  \else
+    /K<</S/JavaScript/JS(\Hy@escapestring{\Fld@keystroke@code})>>%
+  \fi
+  \ifx\Fld@format@code\@empty
+  \else
+    /F<</S/JavaScript/JS(\Hy@escapestring{\Fld@format@code})>>%
+  \fi
+  \ifx\Fld@validate@code\@empty
+  \else
+    /V<</S/JavaScript/JS(\Hy@escapestring{\Fld@validate@code})>>%
+  \fi
+  \ifx\Fld@calculate@code\@empty
+  \else
+    /C<</S/JavaScript/JS(\Hy@escapestring{\Fld@calculate@code})>>%
+  \fi
+  \ifx\Fld@onfocus@code\@empty
+  \else
+    /Fo<</S/JavaScript/JS(\Hy@escapestring{\Fld@onfocus@code})>>%
+  \fi
+  \ifx\Fld@onblur@code\@empty
+  \else
+    /Bl<</S/JavaScript/JS(\Hy@escapestring{\Fld@onblur@code})>>%
+  \fi
+  \ifx\Fld@onmousedown@code\@empty
+  \else
+    /D<</S/JavaScript/JS(\Hy@escapestring{\Fld@onmousedown@code})>>%
+  \fi
+  \ifx\Fld@onmouseup@code\@empty
+  \else
+    /U<</S/JavaScript/JS(\Hy@escapestring{\Fld@onmouseup@code})>>%
+  \fi
+  \ifx\Fld@onenter@code\@empty
+  \else
+    /E<</S/JavaScript/JS(\Hy@escapestring{\Fld@onenter@code})>>%
+  \fi
+  \ifx\Fld@onexit@code\@empty
+  \else
+    /X<</S/JavaScript/JS(\Hy@escapestring{\Fld@onexit@code})>>%
+  \fi
+}
+\ExplSyntaxOn
+\def\Fld@additionalactions
+ {%
+  \exp_args:Ne\str_if_eq:nnF {\Fld@X@additionalactions}{}
+    {
+      \pdfmeta_standard_verify:nT {annot_widget_no_AA}
+        {/AA<<\Fld@X@additionalactions>>}
+    }
+ }
+\ExplSyntaxOff
+\def\Fld@annotnames{%
+  /T(\Fld@name)%
+  \ifx\Fld@altname\relax
+  \else
+    /TU(\Fld@altname)%
+  \fi
+  \ifx\Fld@mappingname\relax
+  \else
+    /TM(\Fld@mappingname)%
+  \fi
+}
+\ExplSyntaxOn
+\def\PDFForm@Check
+  {
+    /Subtype/Widget
+    ~\Fld@annotflags
+    ~\Fld@pageobjref
+    ~\Fld@annotnames
+    /FT/Btn
+   \Fld@flags
+   /Q~\Fld@align
+   /BS<</W~\Fld@borderwidth /S/\Fld@borderstyle>>
+   /AP
+     <<
+      /N
+        <<
+          /Yes~\pdfxform_ref:o{\l_@@_CheckmarkYes_tl}
+          /Off~\pdfxform_ref:o{\l_@@_CheckmarkOff_tl}
+        >>
+    >>
+  /MK<<
+    \int_compare:nNnF {\Fld@rotation}={0}
+      {
+        /R~\Fld@rotation
+      }
+    \tl_if_empty:NF\Fld@bordercolor
+      {
+        /BC[\Fld@bordercolor]
+      }
+    \tl_if_empty:NF\Fld@bcolor
+      {
+        /BG[\Fld@bcolor]
+      }
+    /CA(\Hy@escapestring{\Fld@cbsymbol})%
+  >>
+  /DA
+    (
+      /ZaDb~\strip@pt\Fld@charsize\c_space_tl Tf
+      \tl_if_empty:NF \Fld@color
+        {
+          \c_space_tl \Fld@color
+        }
+    )
+  /H/P
+  \legacy_if:nTF {Fld@checked}
+    {
+      /V/Yes /AS/Yes
+    }
+    {
+      /V/Off /AS/Off
+    }
+  \Fld@additionalactions
+}
+\ExplSyntaxOff
+\ExplSyntaxOn
+   \def\PDFForm@Push
+     {
+       /Subtype/Widget
+       ~\Fld@annotflags
+       ~\Fld@pageobjref
+       ~\Fld@annotnames
+       /FT/Btn
+       ~\Fld@flags
+       /H/P
+       /BS<</W~\Fld@borderwidth/S/\Fld@borderstyle>>
+       \bool_if:nT
+         {
+           !\int_compare_p:nNn {\Fld@rotation} = {0}
+          ||
+           \tl_if_exist_p:N \Fld@bordercolor
+         }
+         {
+           /MK
+             <<
+               \int_compare:nNnF {\Fld@rotation} = {0}
+                 {
+                   /R~\Fld@rotation
+                 }
+               \tl_if_exist:NT \Fld@bordercolor
+                 {
+                   /BC[\Fld@bordercolor]
+                 }
+             >>
+          }
+       /A<</S/JavaScript/JS(\Hy@escapestring{\Fld@onclick@code})>>
+       \Fld@additionalactions
+     }
+
+\ExplSyntaxOff
+\def\PDFForm@List{%
+  /Subtype/Widget%
+  \Fld@annotflags
+  \Fld@pageobjref
+  \Fld@annotnames
+  /FT/Ch%
+  \Fld@flags
+  /Q \Fld@align
+  /BS<</W \Fld@borderwidth/S/\Fld@borderstyle>>%
+  \ifcase0\ifnum\Fld@rotation=\z@   \else 1\fi
+          \ifx\Fld@bordercolor\relax\else 1\fi
+          \ifx\fld@bcolor\relax     \else 1\fi
+          \space
+  \else
+    /MK<<%
+      \ifnum\Fld@rotation=\z@
+      \else
+        /R \Fld@rotation
+      \fi
+      \ifx\Fld@bordercolor\relax
+      \else
+        /BC[\Fld@bordercolor]%
+      \fi
+      \ifx\Fld@bcolor\relax
+      \else
+        /BG[\Fld@bcolor]%
+      \fi
+    >>%
+  \fi
+  /DA(/Helv \strip@pt\Fld@charsize\space Tf%
+      \ifx\Fld@color\@empty\else\space\Fld@color\fi)%
+  \Fld@choices
+  \Fld@additionalactions
+}
+\ExplSyntaxOn
+\def\PDFForm@Radio
+  {
+    /Subtype/Widget
+    ~\Fld@annotflags
+    ~\Fld@pageobjref
+    ~\Fld@annotnames
+    /FT/Btn
+   \Fld@flags
+   /H/P
+   /BS<</W~\Fld@borderwidth/S/\Fld@borderstyle>>
+   /MK<<
+    \ifnum\Fld@rotation=\z@
+    \else
+      /R~\Fld@rotation
+    \fi
+    \ifx\Fld@bordercolor\relax
+    \else
+      /BC[\Fld@bordercolor]%
+    \fi
+    \ifx\Fld@bcolor\relax
+    \else
+      /BG[\Fld@bcolor]%
+    \fi
+     /CA(\Hy@escapestring{\Fld@radiosymbol})%
+    >>
+    /DA(/ZaDb~\strip@pt\Fld@charsize\space Tf%
+      \ifx\Fld@color\@empty\else\space\Fld@color\fi)%
+   \ifx\Fld@default\@empty
+    /V/Off%
+    /DV/Off%
+   \else
+    /V/\Fld@default
+    /DV/\Fld@default
+   \fi
+   \Fld@additionalactions
+ }
+\ExplSyntaxOff
+\ExplSyntaxOn
+% Does an appeareance dict make sense here?
+\def\PDFForm@Text
+  {
+    /Subtype/Widget
+    ~\Fld@annotflags
+    ~\Fld@pageobjref
+    ~\Fld@annotnames
+    /FT/Tx
+    ~\Fld@flags
+    /Q~\Fld@align
+    /BS<</W~\Fld@borderwidth\c_space_tl /S /\Fld@borderstyle>>
+   \bool_if:nT
+     {
+        !\int_compare_p:nNn {\Fld@rotation} = {0}
+       ||
+        \tl_if_exist_p:N \Fld@bordercolor
+       ||
+        \tl_if_exist_p:N \Fld@bcolor
+     }
+     {
+       /MK
+         <<
+           \int_compare:nNnF {\Fld@rotation} = {0}
+             {
+               /R~\Fld@rotation
+             }
+           \tl_if_exist:NT \Fld@bordercolor
+             {
+               /BC[\Fld@bordercolor]
+             }
+           \tl_if_exist:NT \Fld@bcolor
+             {
+               /BG[\Fld@bcolor]
+             }
+        >>
+     }
+   /DA
+     (
+       /Helv~\strip@pt\Fld@charsize\c_space_tl Tf
+       \tl_if_empty:NF {\c_space_tl\Fld@color}
+     )
+   /DV(\Hy@escapestring{\Fld@default})
+   /V(\Hy@escapestring{\Fld@value})
+   ~\Fld@additionalactions
+   \int_compare:nNnT { \Fld@maxlen}>{0}
+     {
+       /MaxLen~\Fld@maxlen
+     }
+  }
+\ExplSyntaxOff
+
+\def\PDFForm@Submit{%
+  /Subtype/Widget%
+  \Fld@annotflags
+  \Fld@pageobjref
+  \Fld@annotnames
+  /FT/Btn%
+  \Fld@flags
+  /H/P%
+  /BS<</W \Fld@borderwidth/S/\Fld@borderstyle>>%
+  \ifcase0\ifnum\Fld@rotation=\z@   \else 1\fi
+          \ifx\Fld@bordercolor\relax\else 1\fi
+          \space
+  \else
+    /MK<<%
+      \ifnum\Fld@rotation=\z@
+      \else
+        /R \Fld@rotation
+      \fi
+      \ifx\Fld@bordercolor\relax
+      \else
+        /BC[\Fld@bordercolor]%
+      \fi
+    >>%
+  \fi
+  /A<<%
+    /S/SubmitForm%
+    /F<<%
+      /FS/URL%
+      /F(\Hy@escapestring{\Form@action})%
+    >>%
+    \Fld@submitflags
+  >>%
+  \Fld@additionalactions
+}
+\ExplSyntaxOn
+       \def\PDFForm@Reset{%
+         /Subtype/Widget%
+         \Fld@annotflags
+         \Fld@pageobjref
+         \Fld@annotnames
+         /FT/Btn%
+         \Fld@flags
+         /H/P%
+         /DA(/Helv~\strip@pt\Fld@charsize\space Tf~0~0~1~rg)%
+         \ifcase0\ifnum\Fld@rotation=\z@   \else 1\fi
+                 \ifx\Fld@bordercolor\relax\else 1\fi
+                 \space
+         \else
+           /MK<<%
+             \ifnum\Fld@rotation=\z@
+             \else
+               /R~\Fld@rotation
+             \fi
+             \ifx\Fld@bordercolor\relax
+             \else
+               /BC[\Fld@bordercolor]%
+             \fi
+           >>%
+         \fi
+         /BS<</W \Fld@borderwidth/S/\Fld@borderstyle>>%
+         /A<</S/ResetForm>>%
+         \Fld@additionalactions
+       }%
+
+
+ %these patterns are used in hyperref checks.
+%it is unclear if they are really useful and if a backend support is
+%needed.
+\str_case:VnF \c_sys_backend_str
+ {
+   { pdfmode }
+   {
+     \def\HyPat@ObjRef
+      {
+       [0-9]*[1-9][0-9]*~0~R
+      }
+   }
+   { dvipdfmx }
+   {
+     \def\HyPat@ObjRef
+      {
+        @[^~]+
+      }
+   }
+   { xdvipdfmx }
+   {
+     \def\HyPat@ObjRef
+      {
+        @[^~]+
+      }
+   }
+ }
+ { %also set in hyperref sty, so probably not needed.
+   \def\HyPat@ObjRef/{.+}
+ }
+
+
+\ExplSyntaxOff
+% UF: removed Hy@writebookmark
+%     \Hy@currentbookmarklevel{0}
+%     \Hy@numberline
+%     \@@writetorep
+%     counter{bookmark@seq@number}
+% removed \HyPsd@SanitizeForOutFile, not needed
+% removed \currentpdfbookmark, defined by bookmark,
+% should use \newcommand there
+% removed \subpdfbookmark, defined by bookmark,
+% should use \newcommand there
+% removed \belowpdfbookmark, defined by bookmark,
+% should use \newcommand there
+% removed \pdfbookmark, defined by bookmark,
+% \BOOKMARK
+% \@BOOKMARK
+%% \RequirePackage{rerunfilecheck}[2009/12/10]
+%% removed \Hy@OutlineRerunCheck, unneeded with bookmark
+%% removed \ReadBookmarks / unneeded with bookmark.
+%% removed \Hy@OutlineName
+%% removed \check@bm@number
+%% removed \calc@bm@number
+
+\ifHy@implicit
+\else
+  \expandafter\endinput
+\fi
+\newlength\Hy@SectionHShift
+\def\Hy@SectionAnchorHref#1{%
+  \ifx\protect\@typeset@protect
+    \Hy@@SectionAnchor{#1}%
+  \fi
+}
+\DeclareRobustCommand*{\Hy@@SectionAnchor}[1]{%
+  \leavevmode
+  \hbox to 0pt{%
+    \kern-\Hy@SectionHShift
+    \Hy@raisedlink{%
+      \hyper@anchorstart{#1}\hyper@anchorend
+    }%
+    \hss
+  }%
+}
+\let\H@old@ssect\@ssect
+\def\@ssect#1#2#3#4#5{%
+  \Hy@MakeCurrentHrefAuto{section*}%
+  \setlength{\Hy@SectionHShift}{#1}%
+  \begingroup
+    \toks@{\H@old@ssect{#1}{#2}{#3}{#4}}%
+    \toks\tw@\expandafter{%
+      \expandafter\Hy@SectionAnchorHref\expandafter{\@currentHref}%
+      #5%
+    }%
+  \edef\x{\endgroup
+    \the\toks@{\the\toks\tw@}%
+  }\x
+}
+\let\H@old@schapter\@schapter
+\def\@schapter#1{%
+  \begingroup
+    \let\@mkboth\@gobbletwo
+    \Hy@MakeCurrentHrefAuto{\Hy@chapapp*}%
+    \Hy@raisedlink{%
+      \hyper@anchorstart{\@currentHref}\hyper@anchorend
+    }%
+  \endgroup
+  \H@old@schapter{#1}%
+}
+\ltx@IfUndefined{@chapter}{}{%
+  \let\Hy@org@chapter\@chapter
+  \def\@chapter{%
+    \def\Hy@next{%
+      \Hy@MakeCurrentHrefAuto{\Hy@chapapp*}%
+      \Hy@raisedlink{%
+        \hyper@anchorstart{\@currentHref}\hyper@anchorend
+      }%
+    }%
+    \ifnum\c@secnumdepth>\m@ne
+      \ltx@IfUndefined{if@mainmatter}%
+      \iftrue{\csname if@mainmatter\endcsname}%
+        \let\Hy@next\relax
+      \fi
+    \fi
+    \Hy@next
+    \Hy@org@chapter
+  }%
+}
+\let\H@old@part\@part
+\begingroup\expandafter\expandafter\expandafter\endgroup
+\expandafter\ifx\csname chapter\endcsname\relax
+  \let\Hy@secnum@part\z@
+\else
+  \let\Hy@secnum@part\m@ne
+\fi
+\def\@part{%
+  \ifnum\Hy@secnum@part>\c@secnumdepth
+    \phantomsection
+  \fi
+  \H@old@part
+}
+\let\H@old@spart\@spart
+\def\@spart#1{%
+  \Hy@MakeCurrentHrefAuto{part*}%
+  \Hy@raisedlink{%
+    \hyper@anchorstart{\@currentHref}\hyper@anchorend
+  }%
+  \H@old@spart{#1}%
+}
+\let\H@old@sect\@sect
+\def\@sect#1#2#3#4#5#6[#7]#8{%
+  \ifnum #2>\c@secnumdepth
+    \expandafter\@firstoftwo
+  \else
+    \expandafter\@secondoftwo
+  \fi
+  {%
+    \Hy@MakeCurrentHrefAuto{section*}%
+    \setlength{\Hy@SectionHShift}{#3}%
+    \begingroup
+      \toks@{\H@old@sect{#1}{#2}{#3}{#4}{#5}{#6}[{#7}]}%
+      \toks\tw@\expandafter{%
+        \expandafter\Hy@SectionAnchorHref\expandafter{\@currentHref}%
+        #8%
+      }%
+    \edef\x{\endgroup
+      \the\toks@{\the\toks\tw@}%
+    }\x
+  }{%
+    \H@old@sect{#1}{#2}{#3}{#4}{#5}{#6}[{#7}]{#8}%
+  }%
+}
+\expandafter\def\csname Parent-4\endcsname{}
+\expandafter\def\csname Parent-3\endcsname{}
+\expandafter\def\csname Parent-2\endcsname{}
+\expandafter\def\csname Parent-1\endcsname{}
+\expandafter\def\csname Parent0\endcsname{}
+\expandafter\def\csname Parent1\endcsname{}
+\expandafter\def\csname Parent2\endcsname{}
+\expandafter\def\csname Parent3\endcsname{}
+\expandafter\def\csname Parent4\endcsname{}
+%%
+%% End of file `hgeneric-testphase.def'.
+%</package>
+%    \end{macrocode}
+%    \begin{macrocode}
+%<*colorscheme>
+% collected from https://tex.stackexchange.com/questions/525261/better-default-colors-for-hyperref-links
+% cite color ignored, as it doesn't fit ... should be done by cite packages ?
+% linkcolor=
+%,filecolor=
+%,urlcolor=
+%,menucolor=
+%,runcolor=
+%,linkbordercolor=
+%,filebordercolor=
+%,urlbordercolor=
+%,menubordercolor=
+%,runbordercolor=
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_original_prop
+ {
+   linkcolor       = [rgb]{1,0,0}, %red
+   filecolor       = [rgb]{0,1,1}, %cyan
+   urlcolor        = [rgb]{1,0,1}, %magenta
+   menucolor       = [rgb]{1, 0, 0}, %red
+   runcolor        = [rgb]{0,1,1}, %cyan
+ %-------------
+   linkbordercolor = [rgb]{1, 0 ,0 },
+   filebordercolor = [rgb]{0, .5, .5},
+   urlbordercolor  = [rgb]{0, 1, 1},
+   menubordercolor = [rgb]{1, 0, 0},
+   runbordercolor  = [rgb]{0, .7, .7}
+ }
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_daleif_prop
+ {
+   linkcolor       = [rgb]{0,0.2,0.6},
+   filecolor       = [rgb]{0.8,0,0.8},
+   urlcolor        = [rgb]{0.8,0,0.8},
+   menucolor       = [rgb]{0,0.2,0.6},
+   runcolor        = [rgb]{0.8,0,0.8},
+ %-------------     %--------
+   linkbordercolor = [rgb]{0,0.2,0.6},
+   filebordercolor = [rgb]{0.8,0,0.8},
+   urlbordercolor  = [rgb]{0.8,0,0.8},
+   menubordercolor = [rgb]{0,0.2,0.6},
+   runbordercolor  = [rgb]{0.8,0,0.8}
+ }
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_julian_prop
+ { %two colors: intern/extern
+   linkcolor       = [rgb]{0.79216, 0, 0.12549},
+   filecolor       = [rgb]{0.01961, 0.44314, 0.6902},
+   urlcolor        = [rgb]{0.01961, 0.44314, 0.6902},
+   menucolor       = [rgb]{0.79216, 0, 0.12549 },
+   runcolor        = [rgb]{0.01961, 0.44314, 0.6902 },
+ %-------------     %--------
+   linkbordercolor = [rgb]{0.79216, 0, 0.12549},
+   filebordercolor = [rgb]{0.01961, 0.44314, 0.6902},
+   urlbordercolor  = [rgb]{0.01961, 0.44314, 0.6902},
+   menubordercolor = [rgb]{0.79216, 0, 0.12549 },
+   runbordercolor  = [rgb]{0.01961, 0.44314, 0.6902 }
+ }
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_tivv_prop
+ { %all darkgray
+   linkcolor       = [rgb]{0.4 ,0.4 ,0.4 },
+   filecolor       = [rgb]{0.4 ,0.4 ,0.4 },
+   urlcolor        = [rgb]{0.4 ,0.4 ,0.4 },
+   menucolor       = [rgb]{0.4 ,0.4 ,0.4 },
+   runcolor        = [rgb]{0.4 ,0.4 ,0.4 },
+ %-------------     %--------
+   linkbordercolor = [rgb]{0.4 ,0.4 ,0.4 },
+   filebordercolor = [rgb]{0.4 ,0.4 ,0.4 },
+   urlbordercolor  = [rgb]{0.4 ,0.4 ,0.4 },
+   menubordercolor = [rgb]{0.4 ,0.4 ,0.4 },
+   runbordercolor  = [rgb]{0.4 ,0.4 ,0.4 }
+ }
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_szabolcsA_prop
+ { %dvipsnam.def
+   linkcolor       = [rgb]{0.06, 0.46, 1}, %NavyBlue
+   filecolor       = [rgb]{1, 0, 0}, %Red
+   urlcolor        = [rgb]{0.06, 0.46, 1}, %NavyBlue
+   menucolor       = [rgb]{1, 0, 0}, %Red
+   runcolor        = [rgb]{1, 0, 0}, %Red
+ %-------------     %------------------
+   linkbordercolor = [rgb]{0.06, 0.46, 1}, %NavyBlue
+   filebordercolor = [rgb]{1, 0, 0}, %Red
+   urlbordercolor  = [rgb]{0.06, 0.46, 1}, %NavyBlue
+   menubordercolor = [rgb]{1, 0, 0}, %Red
+   runbordercolor  = [rgb]{1, 0, 0} %Red
+ }
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_szabolcsB_prop
+ { %dvipsnam.def
+   linkcolor       = [rgb]{0.72, 0, 0}, %BrickRed
+   filecolor       = [rgb]{0, 1, 0},    %Green
+   urlcolor        = [rgb]{0.64, 0.08, 0.98}, %Mulberry
+   menucolor       = [rgb]{0.06, 0.46, 1}, %NavyBlue
+   runcolor        = [rgb]{0.64, 0.08, 0.98}, %Mulberry
+ %-------------     %------------------
+   linkbordercolor = [rgb]{0.72, 0, 0}, %BrickRed
+   filebordercolor = [rgb]{0, 1, 0},    %Green
+   urlbordercolor  = [rgb]{0.64, 0.08, 0.98}, %Mulberry
+   menubordercolor = [rgb]{0.06, 0.46, 1}, %NavyBlue
+   runbordercolor  = [rgb]{0.64, 0.08, 0.98} %Mulberry
+ }
+
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_phelype_prop
+ {
+   linkcolor       = [rgb]{0.50196, 0, 0.02353},
+   filecolor       = [rgb]{0.07451, 0.09412, 0.46667},
+   urlcolor        = [rgb]{0.54118, 0, 0.52941},
+   menucolor       = [rgb]{0.44706, 0.45882, 0},
+   runcolor        = [rgb]{0.07451, 0.46667, 0.46275},
+ %-------------      %-------------
+   linkbordercolor = [rgb]{0.701176, 0.4, 0.414118},
+   filebordercolor = [rgb]{0.444706, 0.456472, 0.680002},
+   urlbordercolor  = [rgb]{0.724708, 0.4, 0.717646},
+   menubordercolor = [rgb]{0.668236, 0.675292, 0.4},
+   runbordercolor  = [rgb]{0.444706, 0.680002, 0.67765}
+ }
+
+\prop_const_from_keyval:Nn \c_@@_colorscheme_henryford_prop
+ {
+   linkcolor       = [rgb]{0,0,0},
+   filecolor       = [rgb]{0,0,0},
+   urlcolor        = [rgb]{0,0,0},
+   menucolor       = [rgb]{0,0,0},
+   runcolor        = [rgb]{0,0,0},
+ %-------------     %--------
+   linkbordercolor = [rgb]{0,0,0},
+   filebordercolor = [rgb]{0,0,0},
+   urlbordercolor  = [rgb]{0,0,0},
+   menubordercolor = [rgb]{0,0,0},
+   runbordercolor  = [rgb]{0,0,0}
+ }
+%</colorscheme>
+%    \end{macrocode}
+% \end{implementation}
+% \newpage
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3backend-testphase.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3backend-testphase.dtx
new file mode 100644
index 00000000000..ffa7fd0b633
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3backend-testphase.dtx
@@ -0,0 +1,1598 @@
+% \iffalse meta-comment
+%
+%% File: l3backend-testphase.dtx
+%
+% Copyright (C) 2019-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    https://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%
+%<*driver>
+\documentclass[full,kernel]{l3doc}
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \title{^^A
+%   The \textsf{l3backend-testphase} package\\ Additional backend PDF features^^A
+%   \\ \LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+%
+%
+% \begin{implementation}
+%
+% \section{\pkg{l3backend-testphase} Implementation}
+%    \begin{macrocode}
+%<drivers>\ProvidesExplFile
+%<*dvipdfmx>
+  {l3backend-testphase-dvipdfmx.def}{2021-02-22}{}
+  {LaTeX~PDF~management~testphase~bundle~backend~support: dvipdfmx}
+%</dvipdfmx>
+%<*dvips>
+  {l3backend-testphase-dvips.def}{2021-02-22}{}
+  {LaTeX~PDF~management~testphase~bundle~backend~support: dvips}
+%</dvips>
+%<*dvisvgm>
+  {l3backend-testphase-dvisvgm.def}{2021-02-22}{}
+  {LaTeX~PDF~management~testphase~bundle~backend~support: dvisvgm}
+%</dvisvgm>
+%<*luatex>
+  {l3backend-testphase-luatex.def}{2021-02-22}{}
+  {LaTeX~PDF~management~testphase~bundle~backend~support: PDF output (LuaTeX)}
+%</luatex>
+%<*pdftex>
+  {l3backend-testphase-pdftex.def}{2021-02-22}{}
+  {LaTeX~PDF~management~testphase~bundle~backend~support: PDF output (pdfTeX)}
+%</pdftex>
+%<*xdvipdfmx>
+  {l3backend-testphase-xetex.def}{2021-02-22}{}
+  {LaTeX~PDF~management~testphase~bundle~backend~support: XeTeX}
+%</xdvipdfmx>
+%    \end{macrocode}
+% \subsection{Crossreferences}
+% This uses the temporary l3ref-tmp.sty. It will
+% will be replaced by kernel code later.
+% It is only need to get a reference for the absolute page counter.
+% This uses the counter from the
+% new lthooks/ltshipout package.
+%    \begin{macrocode}
+%<@@=pdf>
+%<*drivers>
+\RequirePackage{l3ref-tmp}
+\cs_generate_variant:Nn \ref_label:nn {en}
+\cs_generate_variant:Nn \ref_value:nn {en}
+\cs_new_protected:Npn \@@_backend_ref_label:nn #1 #2
+  {
+     \@bsphack
+     \ref_label:nn{#1}{abspage}
+     \@esphack
+  }
+\cs_new:Npn \@@_backend_ref_value:nn #1 #2
+  {
+     \ref_value:nn{#1}{#2}
+  }
+\cs_generate_variant:Nn \@@_backend_ref_label:nn {en}
+\cs_generate_variant:Nn \@@_backend_ref_value:nn {en}
+%</drivers>
+%    \end{macrocode}
+%    \begin{macrocode}
+%<*dvipdfmx|xdvipdfmx>
+% avoid that destinations names are optimized.
+% is this still needed??
+% see https://tug.org/pipermail/dvipdfmx/2019-May/000002.html
+    \__kernel_backend_literal:x { dvipdfmx:config~C~ 0x0010 }
+%</dvipdfmx|xdvipdfmx>
+%    \end{macrocode}
+% \begin{variable}{\g_@@_tmpa_prop, \l_@@_tmpa_tl, \l_@@_backend_tmpa_box }
+% Some scratch variables
+%    \begin{macrocode}
+%<*drivers>
+\prop_new:N \g_@@_tmpa_prop
+\tl_new:N   \l_@@_tmpa_tl
+\box_new:N  \l_@@_backend_tmpa_box
+%</drivers>
+%    \end{macrocode}
+% \end{variable}
+%
+% \begin{variable}
+%  {\g_@@_backend_resourceid_int, \g_@@_backend_name_int, \g_@@_backend_page_int}
+%  a counter to create labels for the resources, a counter
+%  to number properties in bdc marks, a counter for the \cs{pdfpageref} implementation.
+%    \begin{macrocode}
+%<*drivers>
+\int_new:N \g_@@_backend_resourceid_int
+\int_new:N \g_@@_backend_name_int
+\int_new:N \g_@@_backend_page_int
+%</drivers>
+%    \end{macrocode}
+% \end{variable}
+% \subsection{luacode}
+% Load the lua code.
+%    \begin{macrocode}
+%<*luatex>
+    \directlua { require("l3backend-testphase.lua") }
+%</luatex>
+%    \end{macrocode}
+% \subsection{Hooks}
+% \subsubsection{Add the \enquote{end run} hooks}
+% Here we add the end run hook to suitable
+% end hooks.
+%    \begin{macrocode}
+%<*pdftex|luatex>
+% put in \@kernel@after@enddocument@afterlastpage
+\tl_gput_right:Nn \@kernel@after@enddocument@afterlastpage
+  {
+    \g__kernel_pdfmanagement_end_run_code_tl
+  }
+%</pdftex|luatex>
+%<*dvipdfmx|xdvipdfmx>
+% put in \@kernel@after@shipout@lastpage
+\tl_gput_right:Nn \@kernel@after@shipout@lastpage
+  {
+    \g__kernel_pdfmanagement_end_run_code_tl
+  }
+%</dvipdfmx|xdvipdfmx>
+%<*dvips>
+% put in \@kernel@after@shipout@lastpage
+\tl_gput_right:Nn\@kernel@after@shipout@lastpage
+  {
+    \g__kernel_pdfmanagement_end_run_code_tl
+  }
+%</dvips>
+%    \end{macrocode}
+% \subsubsection{Add the \enquote{shipout} hooks}
+% Now we add to the shipout hooks the relevant token lists.
+% We also push the page resources in shipout/firstpage (AtBeginDvi)
+% as the backend code sets color stack there. The xetex driver needs a rule here.
+% If it clashes on the first page, we will need a test ...
+%    \begin{macrocode}
+%<*drivers>
+\tl_if_exist:NTF \@kernel@after@shipout@background
+  {
+    \g@addto@macro \@kernel@before@shipout@background{\relax}
+    \g@addto@macro \@kernel@after@shipout@background
+      {
+        \g__kernel_pdfmanagement_thispage_shipout_code_tl
+      }
+    \tl_gput_left:Nn\@kernel@after@shipout@lastpage
+      {
+        \g__kernel_pdfmanagement_lastpage_shipout_code_tl
+      }
+  }
+  {
+    \hook_gput_code:nnn{shipout/background}{pdf}
+      {
+        \g__kernel_pdfmanagement_thispage_shipout_code_tl
+      }
+    \hook_gput_code:nnn {shipout/lastpage} {pdf}
+      {
+        \g__kernel_pdfmanagement_lastpage_shipout_code_tl
+      }
+  }
+
+%</drivers>
+%    \end{macrocode}
+% \subsection{ The /Pages dictionary (pdfpagesattr) }
+% \begin{NOTE}{UF}
+%  path: Pages
+%  pdfpagesattr is a single token register which is used at the end of the compilation.
+%  dvips syntax: \verb+\special{ps: [/ABC /CDE /EFG /FGH /Rotate 90 /PAGES pdfmark}+
+%  dvipdfmx syntax: \verb+\special{pdf:put @pages <</ABC /WEZ /EFG /XYZ /Rotate 0>>}+
+%  both remove duplicate entries automatically, so there is no need to be careful.
+% \end{NOTE}
+% \begin{macro}{\@@_backend_Pages_primitive:n}
+% This is the primitive command to add something to the /Pages dictionary.
+% It works differently for the backends: pdftex and luatex overwrite existing
+% content, dvips and dvipdfmx are additive. luatex sets it in lua.
+% The higher level code has to take this into account.
+%    \begin{macrocode}
+%<*pdftex>
+\cs_new_protected:Npn \@@_backend_Pages_primitive:n #1
+  {
+    \tex_global:D \tex_pdfpagesattr:D { #1 }
+  }
+%</pdftex>
+%<*luatex>
+%luatex: does it in lua
+\sys_if_engine_luatex:T
+  {
+    \cs_new_protected:Npn \@@_backend_Pages_primitive:n #1
+      {
+        \tex_directlua:D
+          {
+            pdf.setpagesattributes( \@@_backend_luastring:n { #1 } )
+          }
+      }
+  }
+%</luatex>
+%<*dvips>
+\cs_new_protected:Npx \@@_backend_Pages_primitive:n #1
+  {
+    \tex_special:D{ps:~[#1~/PAGES~pdfmark} %]
+  }
+%</dvips>
+%<*dvipdfmx|xdvipdfmx>
+\cs_new_protected:Npn \@@_backend_Pages_primitive:n #1
+  {
+    \@@_backend:n{put~@pages~<<#1>>}
+  }
+%</dvipdfmx|xdvipdfmx>
+%<*dvisvgm>
+\cs_new_protected:Npn \@@_backend_Pages_primitive:n #1
+  {}
+%</dvisvgm>
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{\enquote{Page} and \enquote{ThisPage} attributes (pdfpageattr)}
+% \begin{NOTE}{UF}
+%  path: Page
+%  !!!!!!!!!!!!!!!!!!!!!!
+%  This part of the code depends on zref/xref as it sets labels.
+%  It also depends on code in l3pdfmanagement as the code uses the Core-dictionaries
+%  !!!!!!!!!!!!!!!!!!!!!!
+%
+%  The engines differ a lot here: pdflatex and lualatex uses a register while with
+%  dvips/dvipdfmx a one-shot-special is used. So for pdflatex and lualatex code
+%  to assemble the content of the register is needed. Specials are used at shipout,
+%  the registers is set directly. With lualatex one can use
+%  \cs{latelua} to delay the setting, with pdflatex one has to use a shipout hook.
+%  To get the code on the correct page one has to use the aux with pdflatex.
+%  In sum this means that quite a lot backend commands are needed to handle
+%  this differences. Simply variants of \cs{pdfpageattr} are not enough ...%
+%  dvips syntax: \special{ps: [{ThisPage}<</Rotate 90>> /PUT pdfmark}%
+%  There seem to be an in-built management code: multiple uses don't lead to
+%  multiple entries (/Rotate is special: there is always a /Rotate 0 in the dict,
+%  but seems not to do harm).
+%  dvipdfmx syntax: \special{pdf: put @thispage << /Rotate 90 >>},
+%  like dvips the backend has an in-built  management code.
+%  Both change only the current page, so to get the pdftex behavior (which sets
+%  also the following pages) one need to repeat it on every shipout.
+% \end{NOTE}
+% \begin{macro}
+%   {
+%     \@@_backend_Page_primitive:n,
+%     \@@_backend_Page_gput:nn,
+%     \@@_backend_Page_gremove:n,
+%     \@@_backend_ThisPage_gput:nn,
+%     \@@_backend_ThisPage_gpush:n
+%   }
+% \cs{@@_backend_Page_primitive:n} is the primitive command to add
+% something to the /Page dictionary.
+% It works differently for the backends: pdftex and luatex overwrite existing
+% content, dvips and dvipdfmx are additive. luatex sets it in lua.
+% The higher level code has to take this into account.
+% \cs{@@_backend_Page_gput:nn} stores default values.
+% \cs{@@_backend_Page_gremove:n} allows to remove a value.
+% \cs{@@_backend_ThisPage_gput:nn} adds a value to the current page.
+% \cs{@@_backend_ThisPage_gpush:n} merges the default and the current page values
+% and add them to the dictionary of the current page in
+% \cs{g_@@_backend_thispage_shipout_tl}.
+%    \begin{macrocode}
+%  backend commands
+%<*pdftex>
+ %the primitive
+  \cs_new_protected:Npn \@@_backend_Page_primitive:n #1
+    {
+      \tex_global:D \tex_pdfpageattr:D { #1 }
+    }
+% the command to store default values.
+% Uses a prop with pdflatex + dvi,
+% sets a lua table with lualatex
+ \cs_new_protected:Npn \@@_backend_Page_gput:nn #1 #2 %key,value
+   {
+     \pdfdict_gput:nnn {g_@@_Core/Page}{ #1 }{ #2 }
+   }
+% the command to remove a default value.
+% Uses a prop with pdflatex + dvi,
+% changes a lua table with lualatex
+\cs_new_protected:Npn \@@_backend_Page_gremove:n #1
+  {
+    \pdfdict_gremove:nn  {g_@@_Core/Page}{ #1 }
+  }
+% the command used in the document.
+% direct call of the primitive special with dvips/dvipdfmx
+% \latelua: fill a page related table with lualatex, merge it with the page
+% table and push it directly
+% write to aux and store in prop with pdflatex
+\cs_new_protected:Npn \@@_backend_ThisPage_gput:nn #1 #2
+  {
+    %we need to know the page the resource should be added too.
+    \int_gincr:N\g_@@_backend_resourceid_int
+    %\zref@labelbylist {l3pdf\int_use:N\g_@@_backend_resourceid_int} {l3pdf}
+    %\ref_label:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+     \@@_backend_ref_label:en { l3pdf\int_use:N\g_@@_backend_resourceid_int }{abspage}
+    \tl_set:Nx \l_@@_tmpa_tl
+      {
+        %\zref@extractdefault
+%          {l3pdf\int_use:N\g_@@_backend_resourceid_int}
+%          {pdf@abspage}
+%          {0}
+%        \ref_value:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+        \@@_backend_ref_value:en {l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+      }
+    \pdfdict_if_exist:nF { g_@@_Core/backend_Page\l_@@_tmpa_tl}
+      {
+        \pdfdict_new:n { g_@@_Core/backend_Page\l_@@_tmpa_tl}
+      }
+    %backend_Page has no handler.
+    \pdfdict_gput:nnn {g_@@_Core/backend_Page\l_@@_tmpa_tl}{ #1 }{ #2 }
+  }
+%the code to push the values, used in shipout
+%merges the two props and then fills the register in pdflatex
+%merges the two tables and then fills (in lua) in luatex
+%issues the values stored in the global prop with dvi
+\cs_new_protected:Npn \@@_backend_ThisPage_gpush:n #1
+  {
+    \prop_gset_eq:Nc \g_@@_tmpa_prop { \__kernel_pdfdict_name:n { g_@@_Core/Page } }
+    \prop_if_exist:cT  { \__kernel_pdfdict_name:n { g_@@_Core/backend_Page#1 } }
+      {
+        \prop_map_inline:cn { \__kernel_pdfdict_name:n { g_@@_Core/backend_Page#1 } }
+          {
+            \prop_gput:Nnn \g_@@_tmpa_prop { ##1 }{ ##2 }
+          }
+      }
+    \exp_args:Nx \@@_backend_Page_primitive:n
+      {
+        \prop_map_function:NN \g_@@_tmpa_prop \pdfdict_item:ne
+      }
+  }
+%</pdftex>
+%<*luatex>
+% do we need to use some escaping for the values?????
+\cs_new:Npn \@@_backend_luastring:n #1
+  {
+    "\tex_luaescapestring:D { \tex_unexpanded:D { #1 } }"
+  }
+ %not used, only there for consistency
+\cs_new_protected:Npn \@@_backend_Page_primitive:n #1
+  {
+    \tex_latelua:D
+      {
+        pdf.setpageattributes(\@@_backend_luastring:n { #1 })
+      }
+  }
+  % the command to store default values.
+  % Uses a prop with pdflatex + dvi,
+  % sets a lua table with lualatex
+\cs_new_protected:Npn \@@_backend_Page_gput:nn #1 #2
+  {
+    \tex_directlua:D
+      {
+        ltx.@@.backend_Page_gput
+          (
+            \@@_backend_luastring:n { #1 },
+            \@@_backend_luastring:n { #2 }
+          )
+      }
+  }
+  % the command to remove a default value.
+  % Uses a prop with pdflatex + dvi,
+  % changes a lua table with lualatex
+\cs_new_protected:Npn \@@_backend_Page_gremove:n #1
+  {
+    \tex_directlua:D
+      {
+        ltx.@@.backend_Page_gremove (\@@_backend_luastring:n { #1 })
+      }
+  }
+ % the command used in the document.
+ % direct call of the primitive special with dvips/dvipdfmx
+ % \latelua: fill a page related table with lualatex, merge it with the page
+ % table and push it directly
+ % write to aux and store in prop with pdflatex
+\cs_new_protected:Npn \@@_backend_ThisPage_gput:nn #1 #2
+  {
+    \tex_latelua:D
+      {
+        ltx.@@.backend_ThisPage_gput
+          (
+            tex.count["g_shipout_readonly_int"],
+            \@@_backend_luastring:n { #1 },
+            \@@_backend_luastring:n { #2 }
+          )
+        ltx.@@.backend_ThisPage_gpush (tex.count["g_shipout_readonly_int"])
+      }
+  }
+  %the code to push the values, used in shipout
+  %merges the two props and then fills the register in pdflatex
+  %merges the two tables (the one is probably still empty) and then fills (in lua) in luatex
+  %issues the values stored in the global prop with dvi
+\cs_new_protected:Npn \@@_backend_ThisPage_gpush:n #1
+  {
+    \tex_latelua:D
+      {
+        ltx.@@.backend_ThisPage_gpush (tex.count["g_shipout_readonly_int"])
+      }
+  }
+
+%</luatex>
+%<*dvipdfmx|xdvipdfmx>
+  %the primitive
+\cs_new_protected:Npn \@@_backend_Page_primitive:n #1
+  {
+    \tex_special:D{pdf:~put~@thispage~<<#1>>}
+  }
+  % the command to store default values.
+  % Uses a prop with pdflatex + dvi,
+  % sets a lua table with lualatex
+\cs_new_protected:Npn \@@_backend_Page_gput:nn #1 #2
+  {
+    \pdfdict_gput:nnn {g_@@_Core/Page}{ #1 }{ #2 }
+  }
+  % the command to remove a default value.
+  % Uses a prop with pdflatex + dvi,
+  % changes a lua table with lualatex
+\cs_new_protected:Npn \@@_backend_Page_gremove:n #1
+   {
+     \pdfdict_gremove:nn  {g_@@_Core/Page}{ #1 }
+   }
+  % the command used in the document.
+  % direct call of the primitive special with dvips/dvipdfmx
+  % \latelua: fill a page related table with lualatex, merge it with the page
+  % table and push it directly
+  % write to aux and store in prop with pdflatex
+\cs_new_protected:Npn \@@_backend_ThisPage_gput:nn #1 #2
+  {
+    \@@_backend_Page_primitive:n { /#1~#2 }
+  }
+  %the code to push the values, used in shipout
+  %merges the two props and then fills the register in pdflatex
+  %merges the two tables (the one is probably still empty)
+  % and then fills (in lua) in luatex
+  %issues the values stored in the global prop with dvi
+\cs_new_protected:Npn \@@_backend_ThisPage_gpush:n #1
+  {
+    \exp_args:Nx \@@_backend_Page_primitive:n
+      { \pdfdict_use:n { g_@@_Core/Page} }
+  }
+%</dvipdfmx|xdvipdfmx>
+%<*dvips>
+\cs_new_protected:Npn \@@_backend_Page_primitive:n #1
+   {
+     \tex_special:D{ps:~[{ThisPage}<<#1>>~/PUT~pdfmark} %]
+   }
+  % the command to store default values.
+  % Uses a prop with pdflatex + dvi,
+  % sets a lua table with lualatex
+\cs_new_protected:Npn \@@_backend_Page_gput:nn #1 #2
+   {
+     \pdfdict_gput:nnn {g_@@_Core/Page}{ #1 }{ #2 }
+   }
+  % the command to remove a default value.
+  % Uses a prop with pdflatex + dvi,
+  % changes a lua table with lualatex
+\cs_new_protected:Npn \@@_backend_Page_gremove:n #1
+  {
+    \pdfdict_gremove:nn  {g_@@_Core/Page}{ #1 }
+  }
+  % the command used in the document.
+  % direct call of the primitive special with dvips/dvipdfmx
+  % \latelua: fill a page related table with lualatex, merge it with the page
+  % table and push it directly
+  % write to aux and store in prop with pdflatex
+\cs_new_protected:Npn \@@_backend_ThisPage_gput:nn #1 #2
+  {
+    \@@_backend_Page_primitive:n { /#1~#2 }
+  }
+  %the code to push the values, used in shipout
+  %merges the two props and then fills the register in pdflatex
+  %merges the two tables (the one is probably still empty)
+  %and then fills (in lua) in luatex
+  %issues the values stored in the global prop with dvi
+\cs_new_protected:Npn \@@_backend_ThisPage_gpush:n #1
+  {
+    \exp_args:Nx \@@_backend_Page_primitive:n
+          { \pdfdict_use:n { g_@@_Core/Page} }
+  }
+%</dvips>
+%<*dvisvgm>
+% mostly only dummies ...
+\cs_new_protected:Npn \@@_backend_Page_primitive:n #1
+   {}
+  % Uses a prop with pdflatex + dvi,
+\cs_new_protected:Npn \@@_backend_Page_gput:nn #1 #2
+   {
+     \pdfdict_gput:nnn {g_@@_Core/Page}{ #1 }{ #2 }
+   }
+  % the command to remove a default value.
+  % Uses a prop with pdflatex + dvi,
+\cs_new_protected:Npn \@@_backend_Page_gremove:n #1
+  {
+    \pdfdict_gremove:nn  {g_@@_Core/Page}{ #1 }
+  }
+  % the command used in the document.
+\cs_new_protected:Npn \@@_backend_ThisPage_gput:nn #1 #2
+  {}
+  %the code to push the values, used in shipout
+\cs_new_protected:Npn \@@_backend_ThisPage_gpush:n #1
+  {}
+%</dvisvgm>
+%    \end{macrocode}
+% \end{macro}
+%
+% \subsection{\enquote{Page/Resources}: ExtGState, ColorSpace, Shading, Pattern}
+% Path: Page/Resources/ExtGState etc. The actual output of the resources is handled
+% together with the bdc/Properties. Here is only special code.
+% \begin{macro}{\@@_backend_PageResources_gput:nnn}
+% stores values for the page resources.
+% \begin{arguments}
+% \item name of the resource (ExtGState, ColorSpace, Shading, Pattern)
+% \item a pdf name without slash
+% \item value
+% \end{arguments}
+% \begin{macro}{\@@_backend_PageResources_obj_gpush:}
+% This pushes out the objects. It is a no-op with xdvipdfmx and dvips.
+%    \begin{macrocode}
+% backend commands the command to fill the register
+% and to push the values.
+%
+% The names are quite often needed
+% a similar list is now in l3pdfmanagement. Perhaps it should be merged.
+%<*drivers>
+\clist_const:Nn \c_@@_backend_PageResources_clist
+  {
+    ExtGState,
+    ColorSpace,
+    Pattern,
+    Shading,
+  }
+%</drivers>
+% pdftex and luatex
+%<*pdftex|luatex>
+ %create the backend objects:
+\clist_map_inline:Nn \c_@@_backend_PageResources_clist
+  {
+    \@@_backend_object_new:nn {Page/Resources/#1} {dict}
+    \cs_if_exist:NT \tex_directlua:D
+      {
+        \tex_directlua:D
+          {
+            ltx.@@.object["Page/Resources/#1"]
+            =
+            "\@@_backend_object_ref:n{Page/Resources/#1}"
+          }
+      }
+   }
+%</pdftex|luatex>
+%<*luatex>
+%values are only stored in a prop and will be output at end document.
+\cs_new_protected:Npn \@@_backend_PageResources_gput:nnn #1 #2 #3
+  {
+    \pdfdict_gput:nnn {g_@@_Core/Page/Resources/#1} { #2 }{ #3 }
+    % luatex must also trigger the lua side
+    \tex_latelua:D{ltx.@@.Page.Resources.#1=true}
+    \tex_latelua:D
+      {
+        ltx.pdf.Page_Resources_gpush(tex.count["g_shipout_readonly_int"])
+      }
+  }
+%</luatex>
+%<*pdftex>
+ \cs_new_protected:Npn \@@_backend_PageResources_gput:nnn #1 #2 #3
+   {
+     \pdfdict_gput:nnn {g_@@_Core/Page/Resources/#1} { #2 }{ #3 }
+   }
+%</pdftex>
+%<*pdftex|luatex>
+%code for end of document code
+\cs_new_protected:Npn \@@_backend_PageResources_obj_gpush:
+  {
+    \clist_map_inline:Nn \c_@@_backend_PageResources_clist
+      {
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/##1} }
+          {
+            \@@_backend_object_write:nx
+              { Page/Resources/##1 }
+              { \pdfdict_use:n { g_@@_Core/Page/Resources/##1} }
+          }
+     }
+  }
+%</pdftex|luatex>
+% xdvipdfmx
+% \special{pdf:pageresources<<#1>>} doesn't work correctly with object names ...
+% https://tug.org/pipermail/dvipdfmx/2019-August/000021.html,
+% so we use \special{pdf:put @resources}
+% this must be issued on every page!
+%<*dvipdfmx|xdvipdfmx>
+%objects should not only be created but also "initialized"
+% initialization should be done before anyone tries to write
+% so we add rules for the backend.
+%<xdvipdfmx>\hook_gset_rule:nnnn{shipout/firstpage}{l3backend-xetex}{after}{pdf}
+%<dvipdfmx>\hook_gset_rule:nnnn{shipout/firstpage}{l3backend-dvipdfmx}{after}{pdf}
+%
+\clist_map_inline:Nn \c_@@_backend_PageResources_clist
+  {
+    \@@_backend_object_new:nn   { Page/Resources/#1 } { dict }
+    \hook_gput_code:nnn{shipout/firstpage}{pdf}{\@@_backend_object_write:nn { Page/Resources/#1 } {}}
+  }
+\cs_new_protected:Npn \@@_backend_PageResources:n #1
+  {
+    \@@_backend:n {put~@resources~<<#1>>}
+  }
+\cs_new_protected:Npn \@@_backend_PageResources_gput:nnn #1 #2 #3
+  {
+   % this is not used for output, but there is a test if the resource is empty
+   \exp_args:Nnx
+   \prop_gput:cnn { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/#1} }
+     { \str_convert_pdfname:n {#2} }{ #3 }
+   %objects are not filled with \pdf_object_write as this is not additive!
+    \@@_backend:x
+      {
+        put~\@@_backend_object_ref:n {Page/Resources/#1}<</#2~#3>>
+      }
+  }
+
+\cs_new_protected:Npn \@@_backend_PageResources_obj_gpush: {}
+%</dvipdfmx|xdvipdfmx>
+%<*dvips>
+% dvips unneeded, or no-op
+\cs_new_protected:Npn \@@_backend_PageResources:n #1 {}
+\cs_new_protected:Npn \@@_backend_PageResources_gput:nnn #1 #2 #3
+  { %only for the show command TEST!!
+    \pdfdict_gput:nnn {g_@@_Core/Page/Resources/#1} { #2 }{ #3 }
+  }
+\cs_new_protected:Npn \@@_backend_PageResources_obj_gpush: {}
+%</dvips>
+%<*dvisvgm>
+% dvips unneeded, or no-op
+\cs_new_protected:Npn \@@_backend_PageResources:n #1 {}
+\cs_new_protected:Npn \@@_backend_PageResources_gput:nnn #1 #2 #3
+  { %only for the show command TEST!!
+    \pdfdict_gput:nnn {g_@@_Core/Page/Resources/#1} { #2 }{ #3 }
+  }
+\cs_new_protected:Npn \@@_backend_PageResources_obj_gpush: {}
+%</dvisvgm>
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \subsubsection{Page resources /Properties + BDC operators}
+% \begin{macro}
+%   {
+%     \@@_backend_bdc:nn,
+%     \@@_backend_bdcobject:nn,
+%     \@@_backend_bdcobject:n,
+%     \@@_backend_bmc:n,
+%     \@@_backend_emc:,
+%     \@@_backend_PageResources_gpush:n
+%   }
+% \cs{@@_backend_bdc:nn}, \cs{@@_backend_bdcobject:nn}, \cs{@@_backend_bdcobject:n},
+% \cs{@@_backend_bmc:n} and \cs{@@_backend_emc:}
+%  are the backend command that
+%  create the bdc/emc marker and store the properties.
+% \cs{@@_backend_PageResources_gpush:n} outputs the /Properties and/or the other
+% resources for the current page.
+%    \begin{macrocode}
+% pdftex and luatex (and perhaps dvips ...) need to know if there are in a
+% xform stream ...
+%<*drivers>
+\bool_new:N \l_@@_backend_xform_bool
+%</drivers>
+%<*dvips>
+% dvips is easy: create an object, and reference it in the bdc
+% ghostscript will then automatically replace it by a name
+% and add the name to the /Properties dict
+% special variant von accsupp
+% https://chat.stackexchange.com/transcript/message/50831812#50831812
+%
+\cs_set_protected:Npn \@@_backend_bdc:nn #1 #2 % #1 eg. Span, #2: dict_content
+  {
+    \__pdf_backend_pdfmark:x{/#1~<<#2>>~/BDC}
+  }
+\cs_set_protected:Npn \@@_backend_bdcobject:nn #1 #2 % #1 eg. Span, #2: object name
+  {
+    \__pdf_backend_pdfmark:x{/#1~\@@_backend_object_ref:n{#2}~/BDC}
+  }
+\cs_set_protected:Npn \@@_backend_bdcobject:n #1  % #1 eg. Span,
+  {
+    \__pdf_backend_pdfmark:x{/#1~\@@_backend_object_last:~/BDC}
+  }
+\cs_set_protected:Npn \@@_backend_emc:
+  {
+    \__pdf_backend_pdfmark:n{/EMC} %
+  }
+\cs_set_protected:Npn \@@_backend_bmc:n #1
+  {
+    \__pdf_backend_pdfmark:n{/#1~/BMC} %
+  }
+\cs_new_protected:Npn \@@_backend_PageResources_gpush:n #1 {}
+
+%</dvips>
+%<*dvisvgm>
+% dvisvgm should do nothing
+%
+\cs_set_protected:Npn \@@_backend_bdc:nn #1 #2 % #1 eg. Span, #2: dict_content
+  {}
+\cs_set_protected:Npn \@@_backend_bdcobject:nn #1 #2 % #1 eg. Span, #2: object name
+  {}
+\cs_set_protected:Npn \@@_backend_bdcobject:n #1  % #1 eg. Span,
+  {}
+\cs_set_protected:Npn \@@_backend_emc:
+  {}
+\cs_set_protected:Npn \@@_backend_bmc:n #1
+  {}
+\cs_new_protected:Npn \@@_backend_PageResources_gpush:n #1 {}
+
+%</dvisvgm>
+
+% xetex has to create the entries in the /Properties manually
+% (like the other backends)
+% use pdfbase special
+% https://chat.stackexchange.com/transcript/message/50832016#50832016
+% the property is added to xform resources automatically,
+% no need to worry about it.
+%<*dvipdfmx|xdvipdfmx>
+ \cs_set_protected:Npn \@@_backend_bdcobject:nn #1 #2 % #1 eg. Span, #2: object name
+   {
+     \int_gincr:N \g_@@_backend_name_int
+     \__kernel_backend_literal:x
+       {
+         pdf:code~/#1/l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl BDC
+       }
+     \__kernel_backend_literal:x
+       {
+         pdf:put~@resources~
+           <<
+             /Properties~
+               <<
+                 /l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl
+                 \@@_backend_object_ref:n { #2 }
+               >>
+           >>
+       }
+   }
+ \cs_set_protected:Npn \@@_backend_bdcobject:n #1  % #1 eg. Span
+   {
+     \int_gincr:N \g_@@_backend_name_int
+     \__kernel_backend_literal:x
+       {
+         pdf:code~/#1/l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl BDC
+       }
+     \__kernel_backend_literal:x
+       {
+         pdf:put~@resources~
+           <<
+             /Properties~
+               <<
+                 /l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl
+                 \@@_backend_object_last:
+               >>
+           >>
+       }
+   }
+\cs_set_protected:Npn \@@_backend_bmc:n #1
+   {
+     \__kernel_backend_literal:n {pdf:code~/#1~BMC}  %pdfbase
+   }
+
+%this require management
+\cs_set_protected:Npn \@@_backend_bdc_contobj:nn #1 #2
+  {
+    \pdf_object_unnamed_write:nn { dict }{ #2 }
+    \@@_backend_bdcobject:n { #1 }
+  }
+
+\cs_set_protected:Npn \@@_backend_bdc_contstream:nn #1 #2
+  {
+    \__kernel_backend_literal:n {pdf:code~ /#1~<<#2>>~BDC }
+  }
+
+\cs_set_protected:Npn \@@_backend_bdc:nn #1 #2
+  {
+    \bool_if:NTF  \g__pdfmanagement_active_bool
+      {\cs_gset_eq:NN \@@_backend_bdc:nn \@@_backend_bdc_contobj:nn}
+      {\cs_gset_eq:NN \@@_backend_bdc:nn \@@_backend_bdc_contstream:nn}
+      \@@_backend_bdc:nn {#1}{#2}
+  }
+\cs_set_protected:Npn \@@_backend_emc:
+  {
+    \__kernel_backend_literal:n {pdf:code~EMC}  %pdfbase
+  }
+  % properties are handled automatically, but the other resources should be added
+  % at shipout
+\cs_new_protected:Npn \@@_backend_PageResources_gpush:n #1
+  {
+    \clist_map_inline:Nn \c_@@_backend_PageResources_clist
+      {
+        \prop_if_empty:cF { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/##1} }
+          {
+            \__kernel_backend_literal:x
+              {
+                pdf:put~@resources~
+                  <</##1~\@@_backend_object_ref:n {Page/Resources/##1}>>
+              }
+          }
+      }
+  }
+%</dvipdfmx|xdvipdfmx>
+% luatex + pdftex
+%<*luatex>
+\cs_set_protected:Npn \@@_backend_bdcobject:nn #1 #2 % #1 eg. Span, #2: object name
+  {
+    \int_gincr:N \g_@@_backend_name_int
+    \exp_args:Nx\__kernel_backend_literal_page:n
+      { /#1 ~ /l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl BDC }
+    \bool_if:NTF \l_@@_backend_xform_bool
+      {
+        \exp_args:Nnx\pdfdict_gput:nnn
+          { g_@@_Core/Xform/Resources/Properties }
+          { l3pdf\int_use:N\g_@@_backend_name_int }
+          { \@@_backend_object_ref:n { #2 } }
+      }
+      {
+        \exp_args:Nx \tex_latelua:D
+          {
+            ltx.pdf.Page_Resources_Properties_gput
+              (
+                tex.count["g_shipout_readonly_int"],
+                "l3pdf\int_use:N\g_@@_backend_name_int",
+                "\@@_backend_object_ref:n { #2 }"
+              )
+          }
+      }
+  }
+\cs_set_protected:Npn \@@_backend_bdcobject:n #1% #1 eg. Span
+  {
+    \int_gincr:N \g_@@_backend_name_int
+    \exp_args:Nx\__kernel_backend_literal_page:n
+      { /#1 ~ /l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl BDC }
+    \bool_if:NTF \l_@@_backend_xform_bool
+      {
+        \exp_args:Nnx\pdfdict_gput:nnn %no handler needed
+          { g_@@_Core/Xform/Resources/Properties }
+          { l3pdf\int_use:N\g_@@_backend_name_int }
+          { \@@_backend_object_last: }
+      }
+      {
+        \exp_args:Nx \tex_latelua:D
+          {
+            ltx.pdf.Page_Resources_Properties_gput
+              (
+                tex.count["g_shipout_readonly_int"],
+                "l3pdf\int_use:N\g_@@_backend_name_int",
+                "\@@_backend_object_last:"
+              )
+          }
+      }
+  }
+\cs_set_protected:Npn \@@_backend_bmc:n #1
+   {
+     \__kernel_backend_literal_page:n { /#1~BMC }
+   }
+\cs_set_protected:Npn \@@_backend_bdc_contobj:nn #1 #2
+  {
+    \pdf_object_unnamed_write:nn { dict } { #2 }
+    \@@_backend_bdcobject:n { #1 }
+  }
+\cs_set_protected:Npn \@@_backend_bdc_contstream:nn #1 #2
+  {
+    \__kernel_backend_literal_page:n { /#1~<<#2>>~BDC }
+  }
+\cs_set_protected:Npn \@@_backend_bdc:nn #1 #2
+  {
+    \bool_if:NTF  \g__pdfmanagement_active_bool
+      {\cs_gset_eq:NN \@@_backend_bdc:nn \@@_backend_bdc_contobj:nn}
+      {\cs_gset_eq:NN \@@_backend_bdc:nn \@@_backend_bdc_contstream:nn}
+      \@@_backend_bdc:nn {#1}{#2}
+  }
+\cs_set_protected:Npn \@@_backend_emc:
+  {
+    \__kernel_backend_literal_page:n { EMC }
+  }
+
+\cs_new_protected:Npn \@@_backend_PageResources_gpush:n #1 {}
+%</luatex>
+%<*pdftex>
+% pdflatex is the most complicated as it has to go through the aux ...
+% the push command is extended to take other resources too
+\cs_set_protected:Npn \@@_backend_bdcobject:nn #1 #2 % #1 eg. Span, #2: object name
+  {
+    \int_gincr:N \g_@@_backend_name_int
+    \exp_args:Nx\__kernel_backend_literal_page:n
+      { /#1 ~ /l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl BDC }
+    % code to set the property ....
+    \int_gincr:N\g_@@_backend_resourceid_int
+    \bool_if:NTF \l_@@_backend_xform_bool
+      {
+        \exp_args:Nnxx\pdfdict_gput:nnn %no handler needed
+          { g_@@_Core/Xform/Resources/Properties }
+          { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+          { \@@_backend_object_ref:n { #2 } }
+      }
+      {
+        %\zref@labelbylist
+%          { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+%          { l3pdf }
+%        \ref_label:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+        \@@_backend_ref_label:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+        \tl_set:Nx \l_@@_tmpa_tl
+          {
+            %\zref@extractdefault
+%              { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+%              {pdf@abspage}
+%              {0}
+            %\ref_value:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+            \@@_backend_ref_value:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+          }
+        \pdfdict_if_exist:nF { g_@@_Core/backend_Page\l_@@_tmpa_tl/Resources/Properties }
+          {
+            \pdfdict_new:n { g_@@_Core/backend_Page\l_@@_tmpa_tl/Resources/Properties }
+          }
+        \exp_args:Nnxx\pdfdict_gput:nnn
+          { g_@@_Core/backend_Page\l_@@_tmpa_tl/Resources/Properties }
+          { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+          { \@@_backend_object_ref:n{#2} }
+      }
+  }
+\cs_set_protected:Npn \@@_backend_bdcobject:n #1% #1 eg. Span
+  {
+    \int_gincr:N \g_@@_backend_name_int
+    \exp_args:Nx\__kernel_backend_literal_page:n
+      { /#1 ~ /l3pdf\int_use:N\g_@@_backend_name_int\c_space_tl BDC }
+    % code to set the property ....
+    \int_gincr:N\g_@@_backend_resourceid_int
+    \bool_if:NTF \l_@@_backend_xform_bool
+      {
+        \exp_args:Nnxx\pdfdict_gput:nnn
+          { g_@@_Core/Xform/Resources/Properties }
+          { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+          { \@@_backend_object_last: }
+      }
+      {
+        %\zref@labelbylist
+%          { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+%          { l3pdf }
+       %\ref_label:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+        \@@_backend_ref_label:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+        \tl_set:Nx \l_@@_tmpa_tl
+          {
+            %\zref@extractdefault
+%              { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+%              {pdf@abspage}
+%              {0}
+         %   \ref_value:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+            \@@_backend_ref_value:en{l3pdf\int_use:N\g_@@_backend_resourceid_int}{abspage}
+          }
+        \pdfdict_if_exist:nF { g_@@_Core/backend_Page\l_@@_tmpa_tl/Resources/Properties }
+          {
+            \pdfdict_new:n { g_@@_Core/backend_Page\l_@@_tmpa_tl/Resources/Properties }
+          }
+        \exp_args:Nnxx\pdfdict_gput:nnn
+          { g_@@_Core/backend_Page\l_@@_tmpa_tl/Resources/Properties }
+          { l3pdf\int_use:N\g_@@_backend_resourceid_int }
+          { \@@_backend_object_last: }
+        %\pdfdict_show:n { g_backend_Page\l_@@_tmpa_tl/Resources/Properties }
+      }
+  }
+\cs_set_protected:Npn \@@_backend_bmc:n #1
+  {
+    \__kernel_backend_literal_page:n { /#1~BMC }
+  }
+\cs_set_protected:Npn \@@_backend_bdc_contobj:nn #1 #2
+   {
+     \pdf_object_unnamed_write:nn { dict } { #2 }
+     \@@_backend_bdcobject:n { #1 }
+   }
+\cs_set_protected:Npn \@@_backend_bdc_contstream:nn #1 #2
+   {
+     \__kernel_backend_literal_page:n { /#1~<<#2>>~BDC }
+   }
+\cs_set_protected:Npn \@@_backend_bdc:nn #1 #2
+  {
+    \bool_if:NTF  \g__pdfmanagement_active_bool
+      {\cs_gset_eq:NN \@@_backend_bdc:nn \@@_backend_bdc_contobj:nn}
+      {\cs_gset_eq:NN \@@_backend_bdc:nn \@@_backend_bdc_contstream:nn}
+      \@@_backend_bdc:nn {#1}{#2}
+  }
+\cs_set_protected:Npn \@@_backend_emc:
+  {
+    \__kernel_backend_literal_page:n { EMC }
+  }
+
+\cs_new:Npn \@@_backend_PageResources_gpush_aux:n #1 %#1 ExtGState etc
+  {
+    \prop_if_empty:cF
+      { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/#1} }
+      {
+        \pdfdict_item:ne { #1 }{ \pdf_object_ref:n {Page/Resources/#1}}
+      }
+  }
+
+\cs_new_protected:Npn \@@_backend_PageResources_gpush:n #1
+  {
+     \exp_args:NNx \tex_global:D \tex_pdfpageresources:D
+       {
+         \prop_if_exist:cT
+           { \__kernel_pdfdict_name:n { g_@@_Core/backend_Page#1/Resources/Properties } }
+           {
+             /Properties~
+               <<
+                 \prop_map_function:cN
+                   { \__kernel_pdfdict_name:n { g_@@_Core/backend_Page#1/Resources/Properties } }
+                   \pdfdict_item:ne
+               >>
+           }
+         %% add ExtGState etc
+         \clist_map_function:NN
+           \c_@@_backend_PageResources_clist
+           \@@_backend_PageResources_gpush_aux:n
+       }
+  }
+
+%</pdftex>
+%    \end{macrocode}
+% \end{macro}
+% \subsection{\enquote{Catalog} \& subdirectories (pdfcatalog) }
+% The backend command is already in the driver:
+% \cs{@@_backend_catalog_gput:nn}
+% \subsubsection { Special case: the /Names/EmbeddedFiles dictionary }
+% Entries to /Names are handled differently, in part (/Desc) it is automatic, for
+% other special commands like \cs{pdfnames} must be used. For EmbeddedFiles
+% we need some code to push the tree if files have been added. dvips wants code
+% for every file and then creates the Name tree automatically.
+%    \begin{macrocode}
+% pdflatex
+%<*pdftex>
+\cs_new_protected:Npn \@@_backend_NamesEmbeddedFiles_gpush:n #1 %array content
+  {
+     \pdf_object_unnamed_write:nn {dict} {/Names [#1] }
+     \tex_pdfnames:D {/EmbeddedFiles~\pdf_object_ref_last:}
+  }
+%</pdftex>
+%<*luatex>
+\cs_new_protected:Npn \@@_backend_NamesEmbeddedFiles_gpush:n #1 %array content
+  {
+    \pdf_object_unnamed_write:nn {dict} {/Names [#1] }
+    \tex_pdfextension:D~names~{/EmbeddedFiles~\pdf_object_ref_last: }
+  }
+%</luatex>
+%<*dvipdfmx|xdvipdfmx>
+\cs_new_protected:Npn \@@_backend_NamesEmbeddedFiles_gpush:n #1 %array content
+  {
+    \pdf_object_unnamed_write:nn {dict} { /Names [#1] }
+    %n or x?
+    \__pdf_backend:x {put~@names~<</EmbeddedFiles~\pdf_object_ref_last: >>}
+  }
+%</dvipdfmx|xdvipdfmx>
+
+%dvips: noop
+%<*dvips>
+\cs_new_protected:Npn \@@_backend_NamesEmbeddedFiles_gpush:n #1 {}
+%</dvips>
+%dvisvgm: noop
+%<*dvisvgm>
+\cs_new_protected:Npn \@@_backend_NamesEmbeddedFiles_gpush:n #1 {}
+%</dvisvgm>
+
+%    \end{macrocode}
+% Names in the EmbeddedFiles name tree must sorted alphabetically,
+% so we need commands to create this names. And we need a sequence to store
+% the names and the objects. We use the prefix l3ef, and we assume that at
+% most 9999 files will be used.
+% \begin{variable}{\g_@@_backend_EmbeddedFiles_int}
+% \end{variable}
+% \begin{macro}{\@@_backend_EmbeddedFiles_name:}
+%    \begin{macrocode}
+%<*drivers>
+\int_new:N \g_@@_backend_EmbeddedFiles_int
+\cs_new:Npn \@@_backend_EmbeddedFiles_name:
+ {
+   (
+    l3ef
+    \int_compare:nNnT {\g_@@_backend_EmbeddedFiles_int} < {10}
+     {0}
+    \int_compare:nNnT {\g_@@_backend_EmbeddedFiles_int} < {100}
+     {0}
+    \int_compare:nNnT {\g_@@_backend_EmbeddedFiles_int} < {1000}
+     {0}
+    \int_use:N \g_@@_backend_EmbeddedFiles_int
+   )
+ }
+%</drivers>
+%    \end{macrocode}
+% \end{macro}
+% \begin{variable}{\g_@@_backend_EmbeddedFiles_seq,\g_@@_backend_EmbeddedFiles_named_prop}
+% The sequence will hold the content of the array that is pushed out at then
+% end (not with dvips), the prop holds the obj names-names relation.
+% \end{variable}
+%    \begin{macrocode}
+%<*drivers>
+\seq_new:N \g_@@_backend_EmbeddedFiles_seq
+\prop_new:N \g_@@_backend_EmbeddedFiles_named_prop
+%</drivers>
+%    \end{macrocode}
+% \begin{macro}{\@@_backend_NamesEmbeddedFiles_add:n}
+% This command saves an object reference of a filespec dictionary in the
+% EmbeddedFiles name tree. We define a prop to store the relation between
+% object name and name in the name tree.
+%    \begin{macrocode}
+%<*pdftex|luatex|dvipdfmx|xdvipdfmx>
+\cs_new_protected:Npn  \@@_backend_NamesEmbeddedFiles_add:n #1
+    %#1 object ref
+    {
+      \int_gincr:N \g_@@_backend_EmbeddedFiles_int
+      \prop_gput:Nnx \g_@@_backend_EmbeddedFiles_named_prop
+        { #1 }
+        { \@@_backend_EmbeddedFiles_name: }
+      \seq_gput_right:Nx \g_@@_backend_EmbeddedFiles_seq
+        { \@@_backend_EmbeddedFiles_name: \c_space_tl #1 }
+    }
+
+%</pdftex|luatex|dvipdfmx|xdvipdfmx>
+%<*dvips>
+\cs_new_protected:Npn  \@@_backend_NamesEmbeddedFiles_add:n #1
+      {
+        \int_gincr:N \g_@@_backend_EmbeddedFiles_int
+        \prop_gput:Nnx \g_@@_backend_EmbeddedFiles_named_prop
+         { #1 }
+         { \@@_backend_EmbeddedFiles_name: }
+        \@@_backend_pdfmark:x
+          {
+            /Name~\@@_backend_EmbeddedFiles_name:~
+            /FS~#1~
+            /EMBED
+          }
+      }
+%</dvips>
+%<*dvisvgm>
+%no op. Or is there any sensible use for it?
+\cs_new_protected:Npn  \@@_backend_NamesEmbeddedFiles_add:n #1
+      {}
+%</dvisvgm>
+%    \end{macrocode}
+% \end{macro}
+%  \subsubsection{Form XObject / backend }
+%  \begin{macro}{ \@@_backend_xform_new:nnnn }
+%  \begin{arguments}
+%  \item name
+%  \item attributes
+%  \item resources %needed?? or are all resources autogenerated?
+%  \item content, this doesn't need to be a box!
+%  \end{arguments}
+%  \begin{macro}{ \@@_backend_xform_use:n, \@@_backend_xform_ref:n }
+%    \begin{macrocode}
+%<*pdftex>
+\cs_new_protected:Npn \@@_backend_xform_new:nnnn #1 #2 #3 #4
+% #1 name
+% #2 attributes
+% #3 resources
+% #4 content, not necessarily a box!
+  {
+    \hbox_set:Nn \l_@@_backend_tmpa_box
+      {
+        \bool_set_true:N \l_@@_backend_xform_bool
+        \prop_gclear:c {\__kernel_pdfdict_name:n { g_@@_Core/Xform/Resources/Properties }}
+        #4
+      }
+    %store the dimensions
+    \tl_const:cx
+      { c_@@_backend_xform_wd_ \tl_to_str:n {#1} _tl }
+      { \tex_the:D \box_wd:N \l_@@_backend_tmpa_box }
+    \tl_const:cx
+      { c_@@_backend_xform_ht_ \tl_to_str:n {#1} _tl }
+      { \tex_the:D \box_ht:N \l_@@_backend_tmpa_box }
+    \tl_const:cx
+      { c_@@_backend_xform_dp_ \tl_to_str:n {#1} _tl }
+      { \tex_the:D \box_dp:N \l_@@_backend_tmpa_box }
+    %% do we need to test if #2 and #3 are empty??
+    \tex_immediate:D \tex_pdfxform:D
+      ~  attr      ~ { #2 }
+    %% which other resources should be default? Is an argument actually needed?
+      ~  resources ~
+      {
+        #3
+        \int_compare:nNnT
+          { \prop_count:c { \__kernel_pdfdict_name:n { g_@@_Core/Xform/Resources/Properties } } }
+          >
+          { 0 }
+          {
+            /Properties~
+              <<
+                \pdfdict_use:n { g_@@_Core/Xform/Resources/Properties }
+              >>
+          }
+
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/ExtGState } }
+          {
+            /ExtGState~ \pdf_object_ref:n { Page/Resources/ExtGState }
+          }
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/Pattern } }
+          {
+            /Pattern~ \pdf_object_ref:n { Page/Resources/Pattern }
+          }
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/Shading } }
+          {
+            /Shading~ \pdf_object_ref:n { Page/Resources/Shading }
+          }
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/ColorSpace } }
+          {
+            /ColorSpace~ \pdf_object_ref:n { Page/Resources/ColorSpace }
+          }
+      }
+      \l_@@_backend_tmpa_box
+   \int_const:cn
+     { c_@@_backend_xform_ \tl_to_str:n {#1} _int }
+     { \tex_pdflastxform:D }
+  }
+
+\cs_new_protected:Npn \@@_backend_xform_use:n #1
+  {
+    \tex_pdfrefxform:D
+      \int_use:c { c_@@_backend_xform_ \tl_to_str:n {#1} _int }
+      \scan_stop:
+  }
+
+\cs_new:Npn \@@_backend_xform_ref:n #1
+  {
+    \int_use:c { c_@@_backend_xform_ \tl_to_str:n {#1} _int } ~ 0 ~ R
+  }
+%</pdftex>
+%<*luatex>
+%luatex
+%nearly identical but not completely ...
+\cs_new_protected:Npn \@@_backend_xform_new:nnnn #1 #2 #3 #4
+% #1 name
+% #2 attributes
+% #3 resources
+% #4 content, not necessarily a box!
+  {
+    \hbox_set:Nn \l_@@_backend_tmpa_box
+      {
+        \bool_set_true:N \l_@@_backend_xform_bool
+        \prop_gclear:c { \__kernel_pdfdict_name:n { g_@@_Core/Xform/Resources/Properties } }
+        #4
+      }
+    \tl_const:cx
+      { c_@@_backend_xform_wd_ \tl_to_str:n {#1} _tl }
+      { \tex_the:D \box_wd:N \l_@@_backend_tmpa_box }
+    \tl_const:cx
+      { c_@@_backend_xform_ht_ \tl_to_str:n {#1} _tl }
+      { \tex_the:D \box_ht:N \l_@@_backend_tmpa_box }
+    \tl_const:cx
+      { c_@@_backend_xform_dp_ \tl_to_str:n {#1} _tl }
+      { \tex_the:D \box_dp:N \l_@@_backend_tmpa_box }
+    %% do we need to test if #2 and #3 are empty??
+    \tex_immediate:D \tex_pdfxform:D
+      ~  attr      ~ { #2 }
+      %% which resources should be default? Is an argument actually needed?
+      ~  resources ~
+      {
+        #3
+        \int_compare:nNnT
+          {\prop_count:c { \__kernel_pdfdict_name:n { g_@@_Core/Xform/Resources/Properties } }}
+          >
+          { 0 }
+          {
+            /Properties~
+              <<
+                \pdfdict_use:n { g_@@_Core/Xform/Resources/Properties }
+              >>
+          }
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/ExtGState } }
+          {
+            /ExtGState~ \pdf_object_ref:n { Page/Resources/ExtGState }
+          }
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/Pattern } }
+          {
+            /Pattern~ \pdf_object_ref:n { Page/Resources/Pattern }
+          }
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/Shading } }
+          {
+            /Shading~ \pdf_object_ref:n { Page/Resources/Shading }
+          }
+        \prop_if_empty:cF
+          { \__kernel_pdfdict_name:n { g_@@_Core/Page/Resources/ColorSpace } }
+          {
+            /ColorSpace~ \pdf_object_ref:n { Page/Resources/ColorSpace }
+          }
+      }
+      \l_@@_backend_tmpa_box
+      \int_const:cn
+        { c_@@_backend_xform_ \tl_to_str:n {#1} _int }
+        { \tex_pdflastxform:D }
+  }
+
+\cs_new_protected:Npn \@@_backend_xform_use:n #1 %protected as with xelatex
+  {
+    \tex_pdfrefxform:D \int_use:c
+      {
+        c_@@_backend_xform_ \tl_to_str:n {#1} _int
+      }
+      \scan_stop:
+  }
+
+\cs_new:Npn \@@_backend_xform_ref:n #1
+  { \int_use:c { c_@@_backend_xform_ \tl_to_str:n {#1} _int } ~ 0 ~ R }
+
+%</luatex>
+%<*dvipdfmx|xdvipdfmx>
+% xetex
+   % it needs a bit testing if it really works to set the box to 0 before the special ...
+   % does it disturb viewing the xobject?
+   % what happens with the resources (bdc)? (should work as they are specials too)
+   % xetex requires that the special is in horizontal mode. This means it affects
+   % typesetting. But we can no delay the whole form code to shipout
+   % as the object reference and the size is often wanted on the current page.
+   % so we need to allocate a box - but probably they won't be thousands xform
+   % in a document so it shouldn't matter.
+    \cs_new_protected:Npn \@@_backend_xform_new:nnnn #1 #2 #3 #4
+    % #1 name
+    % #2 attributes
+    % #3 resources
+    % #4 content, not necessarily a box!
+      {
+         \int_gincr:N \g_@@_backend_object_int
+         \int_const:cn
+           { c_@@_backend_xform_ \tl_to_str:n {#1} _int }
+           { \g_@@_backend_object_int }
+         \box_new:c { g_@@_backend_xform_#1_box }
+         \hbox_gset:cn { g_@@_backend_xform_#1_box }
+           {
+             \bool_set_true:N \l_@@_backend_xform_bool
+             #4
+           }
+         \tl_const:cx
+           { c_@@_backend_xform_wd_ \tl_to_str:n {#1} _tl }
+           { \tex_the:D \box_wd:c { g_@@_backend_xform_#1_box } }
+         \tl_const:cx
+           { c_@@_backend_xform_ht_ \tl_to_str:n {#1} _tl }
+           { \tex_the:D \box_ht:c { g_@@_backend_xform_#1_box } }
+         \tl_const:cx
+           { c_@@_backend_xform_dp_ \tl_to_str:n {#1} _tl }
+           { \tex_the:D \box_dp:c { g_@@_backend_xform_#1_box } }
+         \box_set_dp:cn  { g_@@_backend_xform_#1_box } { \c_zero_dim }
+         \box_set_ht:cn  { g_@@_backend_xform_#1_box } { \c_zero_dim }
+         \box_set_wd:cn  { g_@@_backend_xform_#1_box } { \c_zero_dim }
+         \hook_gput_next_code:nn {shipout/background}
+           {
+             \mode_leave_vertical: %needed, the xform disappears without it.
+             \@@_backend:x
+               {
+                 bxobj  ~ \@@_backend_xform_ref:n  { #1 }
+                 \c_space_tl width  ~ \pdfxform_wd:n { #1 }
+                 \c_space_tl height ~ \pdfxform_ht:n { #1 }
+                 \c_space_tl depth  ~ \pdfxform_dp:n { #1 }
+               }
+             \box_use_drop:c { g_@@_backend_xform_#1_box }
+             \@@_backend:x {put ~ @resources ~<<#3>> }
+             \@@_backend:x
+               {
+                 put~ @resources ~
+                   <<
+                     /ExtGState~ \pdf_object_ref:n { Page/Resources/ExtGState }
+                   >>
+               }
+             \@@_backend:x
+               {
+                 put~ @resources ~
+                 <<
+                   /Pattern~ \pdf_object_ref:n { Page/Resources/Pattern }
+                 >>
+               }
+             \@@_backend:x
+               {
+                 put~ @resources ~
+                 <<
+                   /Shading~ \pdf_object_ref:n { Page/Resources/Shading }
+                 >>
+               }
+             \@@_backend:x
+               {
+                 put~ @resources ~
+                 <<
+                   /ColorSpace~
+                   \pdf_object_ref:n { Page/Resources/ColorSpace }
+                 >>
+               }
+             \exp_args:Nx
+             \@@_backend:x {exobj ~<<#2>>}
+           }
+      }
+
+
+
+    \cs_new:Npn \@@_backend_xform_ref:n #1
+      {
+        @pdf.xform \int_use:c { c_@@_backend_xform_ \tl_to_str:n {#1} _int }
+      }
+
+    \cs_new_protected:Npn \@@_backend_xform_use:n #1
+     {
+       \hbox_set:Nn \l_@@_backend_tmpa_box
+         {
+           \@@_backend:x
+             {
+               uxobj~ \@@_backend_xform_ref:n { #1 }
+             }
+         }
+       \box_set_wd:Nn  \l_@@_backend_tmpa_box { \pdfxform_wd:n { #1 } }
+       \box_set_ht:Nn  \l_@@_backend_tmpa_box { \pdfxform_ht:n { #1 } }
+       \box_set_dp:Nn  \l_@@_backend_tmpa_box { \pdfxform_dp:n { #1 } }
+       \box_use_drop:N \l_@@_backend_tmpa_box
+     }
+%</dvipdfmx|xdvipdfmx>
+%<*dvisvgm>
+% unclear what it should do!!
+\cs_new_protected:Npn \@@_backend_xform_new:nnnn #1 #2 #3 #4 {}
+\cs_new_protected:Npn \@@_backend_xform_use:n #1 {}
+\cs_new:Npn \@@_backend_xform_ref:n {}
+%</dvisvgm>
+%<*drivers>
+%% all
+\prg_new_conditional:Npnn \@@_backend_xform_if_exist:n #1 { p , T , F , TF }
+  {
+    \int_if_exist:cTF { c_@@_backend_xform_ \tl_to_str:n {#1} _int }
+     { \prg_return_true: }
+     { \prg_return_false:}
+  }
+\prg_new_eq_conditional:NNn \pdfxform_if_exist:n\@@_backend_xform_if_exist:n
+  { TF , T , F , p }
+%</drivers>
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \subsection{lua code for lualatex}
+%    \begin{macrocode}
+%<*lua>
+ltx= ltx or {}
+ltx.@@      = ltx.@@ or {}
+ltx.@@.Page = ltx.@@.Page or {}
+ltx.@@.Page.dflt = ltx.@@.Page.dflt or {}
+ltx.@@.Page.Resources = ltx.@@.Resources or {}
+ltx.@@.Page.Resources.Properties = ltx.@@.Page.Resources.Properties or {}
+ltx.@@.Page.Resources.List={"ExtGState","ColorSpace","Pattern","Shading"}
+ltx.@@.object = ltx.@@.object or {}
+
+ltx.pdf= ltx.pdf or {} -- for "public" functions
+
+local @@ = ltx.@@
+local pdf = pdf
+
+local function @@_backend_Page_gput (name,value)
+ @@.Page.dflt[name]=value
+end
+
+local function @@_backend_Page_gremove (name)
+ @@.Page.dflt[name]=nil
+end
+
+local function @@_backend_Page_gclear ()
+ @@.Page.dflt={}
+end
+
+local function @@_backend_ThisPage_gput (page,name,value)
+ @@.Page[page] = @@.Page[page] or {}
+ @@.Page[page][name]=value
+end
+
+local function @@_backend_ThisPage_gpush (page)
+ local token=""
+ local t = {}
+ local tkeys= {}
+ for name,value in pairs(@@.Page.dflt) do
+   t[name]=value
+ end
+ if @@.Page[page] then
+  for name,value in pairs(@@.Page[page]) do
+   t[name] = value
+  end
+ end
+ -- sort the table to get reliable test files.
+ for name,value in pairs(t) do
+  table.insert(tkeys,name)
+ end
+ table.sort(tkeys)
+ for _,name in ipairs(tkeys) do
+   token = token .. "/"..name.." "..t[name]
+ end
+ return token
+end
+
+function ltx.@@.backend_ThisPage_gput (page,name,value) -- tex.count["g_shipout_readonly_int"]
+ @@_backend_ThisPage_gput (page,name,value)
+end
+
+function ltx.@@.backend_ThisPage_gpush (page)
+  pdf.setpageattributes(@@_backend_ThisPage_gpush (page))
+end
+
+function ltx.@@.backend_Page_gput (name,value)
+  @@_backend_Page_gput (name,value)
+end
+
+function ltx.@@.backend_Page_gremove (name)
+  @@_backend_Page_gremove (name)
+end
+
+function ltx.@@.backend_Page_gclear ()
+  @@_backend_Page_gclear ()
+end
+
+
+local Properties  = ltx.@@.Page.Resources.Properties
+local ResourceList= ltx.@@.Page.Resources.List
+local function @@_backend_PageResources_gpush (page)
+ local token=""
+ if Properties[page] then
+-- we sort the table, so that the pdf test works
+  local t = {}
+  for name,value in pairs  (Properties[page]) do
+   table.insert (t,name)
+  end
+  table.sort (t)
+  for _,name in ipairs(t) do
+   token = token .. "/"..name.." ".. Properties[page][name]
+  end
+  token = "/Properties <<"..token..">>"
+ end
+  for i,name in ipairs(ResourceList) do
+   if ltx.@@.Page.Resources[name] then
+   token = token .. "/"..name.." "..ltx.pdf.object_ref("Page/Resources/"..name)
+   end
+  end
+ return token
+end
+
+-- the function is public, as I probably need it in tagpdf too ...
+function ltx.pdf.Page_Resources_Properties_gput (page,name,value) -- tex.count["g_shipout_readonly_int"]
+ Properties[page] = Properties[page] or {}
+ Properties[page][name]=value
+ pdf.setpageresources(@@_backend_PageResources_gpush (page))
+end
+
+function ltx.pdf.Page_Resources_gpush(page)
+ pdf.setpageresources(@@_backend_PageResources_gpush (page))
+end
+
+function ltx.pdf.object_ref (objname)
+ if ltx.@@.object[objname] then
+  local ref= ltx.@@.object[objname]
+  return ref
+ else
+  return "false"
+ end
+end
+%</lua>
+%    \end{macrocode}
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfannot.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfannot.dtx
new file mode 100644
index 00000000000..94b7a89af87
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfannot.dtx
@@ -0,0 +1,583 @@
+% \iffalse meta-comment
+%
+%% File: l3pdfannot.dtx
+%
+% Copyright (C) 2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,
+ pdftitle=l3pdfannot (LaTeX PDF management testphase bundle)}
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+% \providecommand\hook[1]{\texttt{#1}}
+% \title{^^A
+%   The \pkg{l3pdfannot} module\\ Commands for PDF annotations   ^^A
+%   \\ \LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-21}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{l3pdfannot} documentation}
+% This module contains a number of commands to create PDF annotations.
+% The commands are \emph{not} always simple wrappers around primitive commands.
+% To allow external packages to configure links and other annotations,
+% some of the commands have hooks and use shared attribute dictionaries.
+% For these commands the hooks and dictionaries are selected depending on the \meta{type}
+% of the annotation. Currently the module only supports some general commands
+% and link annotations. Commands for other annotations like widgets will be added
+% later.
+%
+% \subsection{General annotation commands}
+%
+% \begin{function}[added = 2019-09-05, updated = 2020-04-14]
+%   { \pdfannot_box:nnnn }
+%   \begin{syntax}
+%     \cs{pdfannot_box:nnnn} \Arg{width} \Arg{height} \Arg{depth} \Arg{annot spec}
+%   \end{syntax}
+%   This creates an \texttt{/Type/Annot} object with the given dimensions.
+%   It doesn't use hooks or dictionaries.
+% \end{function}
+% \begin{function}[added = 2020-03-30]
+%   { \pdfannot_box:nnnnn }
+%   \begin{syntax}
+%     \cs{pdfannot_box:nnnnn} \Arg{type} \Arg{width} \Arg{height} \Arg{depth} \Arg{annot spec}
+%   \end{syntax}
+%   This creates an \texttt{/Type/Annot} object with the given dimensions.
+%   \meta{type} should be currently one of |link/URI|, |link/GoToR|,
+%  |link/Launch|, |link/GoTo| or |link/Named| or
+%  |widget|, it will then insert the attribute dictionary of this type
+%   additionally to the manually given \meta{annot spec}.
+%   The attribute dictionaries can be filled with commands described below.
+%   Hooks are not used.
+% \end{function}
+% \begin{function}[added = 2019-09-05]
+%   { \pdfannot_box_ref_last: }
+%   \begin{syntax}
+%     \cs{pdfannot_box_ref_last:}
+%   \end{syntax}
+%   This retrieves the object reference of the last box annotation created.
+% \end{function}
+% \subsection{Link annotations}
+% Link annotations are special cases of annotations. In the PDF they are identified
+% by an |/Subtype/Link| entry in the dictionary.
+% Link annotations are quite important as many documents contain links,
+% both internal and external. They need a set of special commands for two reasons:
+%
+% At first the content of links are not only boxes. Links can contain line
+% and page breaks (this is normally implemented by the primitive command by
+% creating a set of annotations).
+%
+% At second link annotations are objects that need some
+% \enquote{management} as more than one
+% package wants to configure their look and behaviour.
+% For example \pkg{hyperref}, \pkg{ocgx2} and the code for tagged PDF (currently
+% in \pkg{tagpdf}) all want to add keys and values to the dictionaries of
+% link annotation and code around links.
+% So commands to create link annotations should offer suitable hooks.
+% There are three standard places in a link where such hooks are needed:
+% At the begin (for example for a structure command or color),
+% in the \emph{attr spec} dictionary of the link (for example for the border), and
+% at the end of the link (to close a structure or the color group).
+% For the begin and end hooks of the LaTeX hook management are predefined and used.
+% To add and remove values from the \emph{attr spec} dictionary special
+% commands described below are provided. The link commands switch to horizontal mode
+% as the commands of pdftex and luatex can't be used in vertical mode.
+%
+% \begin{variable}{\c_pdfannot_link_types_seq}
+% There are currently five link types, \texttt{URI}, \texttt{GoToR},
+%  \texttt{Launch}, \texttt{GoTo} or \texttt{Named}, and there are store in this
+%  constant.
+% \end{variable}
+% \begin{variable}
+%  {
+%   pdfannot/link/TYPE/before,
+%   pdfannot/link/TYPE/begin,
+%   pdfannot/link/TYPE/end,
+%   pdfannot/link/TYPE/after
+%  }
+%  These are the hooks used by the following commands. TYPE can be one of
+%  \texttt{URI}, \texttt{GoToR},
+%  \texttt{Launch}, \texttt{GoTo} or \texttt{Named}
+% \end{variable}
+% \begin{variable}
+%  {
+%    link/TYPE
+%  }
+%  These is the name of the dictionary used by the following commands. TYPE can be one of
+%  \texttt{URI}, \texttt{GoToR},
+%  \texttt{Launch}, \texttt{GoTo} or \texttt{Named}. The dictionary can be changed
+%  by the commands \cs{pdfannot_dict_put:nnn} and friends described below.
+% \end{variable}
+% \begin{function}[added = 2020-03-12, updated = 2020-12-06]{ \pdfannot_link:nnn }
+%   \begin{syntax}
+%     \cs{pdfannot_link:nnn} \Arg{type} \Arg{user action spec} \Arg{link text}
+%   \end{syntax}
+%  This creates a link around the \meta{link text} with the specified
+%  \meta{user action spec}\footnote{The wording follows the pdftex documentation}.
+%  \texttt{/Subtype/Link} is added automatically.
+%  \meta{type} should be one of \texttt{URI}, \texttt{GoToR},
+%  \texttt{Launch}, \texttt{GoTo} or \texttt{Named}. The |GoTo| variant does
+%  \emph{not} complain if the destination name is not known like
+%  \cs{pdfannot_link_goto_begin:nw}.
+%  The attributes stored in the local dictionary
+%  \texttt{link/}\meta{type} are inserted as
+%  \emph{attr spec} and the code in the begin and end hook
+%  \texttt{pdfannot/link/\meta{type}/before}
+%  and \texttt{pdfannot/link/\meta{type}/after}
+%  is executed  before and after the link (outside the link command)
+%  while \texttt{pdfannot/link/\meta{type}/begin}
+%  and \texttt{pdfannot/link/\meta{type}/end} are directly around the link
+%  text. None of the hooks introduce a group.
+%  \meta{type} should normally be identical to the value of the |/S| key
+%  in the action dictionary.
+%  As example
+%  \begin{verbatim}
+%    \pdfannot_dict_put:nnn
+%      {link/URI} { C } {[1~0~0]} %red border
+%    \pdfannot_link:nnn { URI }
+%     {
+%       /A
+%         <<
+%           /Type/Action
+%           /S/URI
+%           /URI(https://www.latex-project.org)
+%         >>
+%     }
+%     { link text }
+%    \end{verbatim}
+%
+%
+% \end{function}
+% \begin{function}[updated = 2020-12-06]{ \pdfannot_link_begin:nnw, \pdfannot_link_end:n }
+%   \begin{syntax}
+%     \cs{pdfannot_link_begin:nnw} \Arg{type} \Arg{user action spec} \meta{content}
+%     \cs{pdfannot_link_end:n} \Arg{type}
+%   \end{syntax}
+%  This creates a link around the \meta{content} with the specified
+%  \meta{user action spec} (e.g. an /A dictionary with an URI) or
+%  \meta{destination} (a name as defined with the
+%  first argument of \cs{pdf_destination:nn}).
+%  \texttt{/Subtype/Link} is added automatically.
+%  In contrast to \cs{pdfannot_link:nnn} this function
+%  does not absorb the argument when finding the \meta{content}, and so can
+%  be used in circumstances where the \meta{content} may not be a simple
+%  argument. But beside this, it works similar and use the same hooks.
+%  As example
+%  \begin{verbatim}
+%    \pdfannot_link_begin:nnw { URI }
+%     {
+%       /A<<
+%         /Type/Action
+%         /S/URI
+%         /URI(https://www.latex-project.org)
+%       >>
+%     }
+%     link text
+%    \pdfannot_link_end:n { URI }
+%    \end{verbatim}
+% \end{function}
+% \begin{function}[updated = 2020-12-06]{ \pdfannot_link_goto_begin:nw, \pdfannot_link_goto_end: }
+%   \begin{syntax}
+%     \cs{pdfannot_link_goto_begin:nw} \Arg{destination} \meta{content}
+%     \cs{pdfannot_link_goto_end:}
+%   \end{syntax}
+% This is a special, shorter version for links to internal destinations. It always
+% uses the hooks and dictionary of the |GoTo| link type. \meta{destination} is a
+% destination name. In difference to |\pdfannot_link:nnn { GoTo }| it will complain if
+% \meta{destination} is an unknown destination and give the message
+%
+% |name{ZZZZ} has been referenced but does not exist, replaced by a fixed one|
+%
+% \end{function}
+% \begin{function}[added = 2021-02-14]{  \pdfannot_link_ref_last: }
+%   This retrieves the object reference a link created previously with the commands
+%   above. This doesn't work currently with xelatex but a feature request has
+%   been made. see https://tug.org/pipermail/dvipdfmx/2020-December/000134.html
+% \end{function}
+% \begin{function}[added = 2021-02-14]{  \pdfannot_ref_last: }
+%   This retrieves the object reference a previously annotation
+%   created either with a link or a general box command. When the last was a link
+%   it won't work with xelatex.
+%   see https://tug.org/pipermail/dvipdfmx/2020-December/000134.html
+% \end{function}
+% \begin{NOTE}{UF}
+% only annot link or also annot?
+% \end{NOTE}
+% \begin{function}[added = 2020-03-12]{  \pdfannot_link_margin:n }
+%  \begin{syntax}
+%    \cs{pdfannot_link_margin:n} \Arg{dimen}
+%  \end{syntax}
+%   This sets the dimension of the link margin.
+% \end{function}
+% \begin{function}[added = 2020-12-04]{ \pdfannot_dict_put:nnn }
+%  \begin{syntax}
+%    \cs{pdfannot_dict_put:nnn} \Arg{dictionary name} \Arg{key} \Arg{value}
+%  \end{syntax}
+%   This adds (locally) a key-value to the internal annot dictionaries used
+%   by the link commands above.
+%   \meta{dictionary name} should be currently one of \texttt{link/URI},
+%   \texttt{link/URI},\texttt{link/GoToR}, \texttt{link/Launch},
+%   \texttt{link/GoTo}, \texttt{link/Named}.
+% \end{function}
+% \begin{function}[added = 2020-12-04]{ \pdfannot_dict_remove:nn }
+%  \begin{syntax}
+%    \cs{pdfannot_dict_remove:nn} \Arg{dictionary name} \Arg{key}
+%  \end{syntax}
+%   This removes a key-value from the internal annot dictionary
+%   \meta{dictionary name} should be currently one of
+%   \texttt{link/URI}, \texttt{link/GoToR}, \texttt{link/Launch},
+%   \texttt{link/GoTo}, \texttt{link/Named}.
+% \end{function}
+% \begin{function}[added = 2020-12-04]{ \pdfannot_dict_show:n }
+%  \begin{syntax}
+%    \cs{pdfannot_dict_show:n} \Arg{dictionary name}
+%  \end{syntax}
+%   This shows the content of the internal annot dictionary.
+%  \meta{dictionary name} should be currently one of \texttt{link/URI},
+%   \texttt{link/URI}, \texttt{link/GoToR}, \texttt{link/Launch},
+%   \texttt{link/GoTo}, \texttt{link/Named}.
+% \end{function}
+%
+% \begin{variable}[added = 2020-12-28]{\l_pdfannot_F_bitset}
+%  This is a bitset variable, with the named index names suitable for the
+%  /F flag in an annotation.
+%  It can be used for example like this:
+%  \begin{verbatim}
+%  \pdfannot_dict_put:nnn {link/URI} {F}
+%     { \bitset_to_arabic:N \l_pdfannot_F_bitset }
+%  \bitset_set_true:Nn \l_pdfannot_F_bitset {Print}
+%  \end{verbatim}
+%  The known keys for the bitset are |Invisible|, |Hidden|,
+%  |Print|, |NoZoom|, |NoRotate|, |NoView|, |ReadOnly|, |Locked|,  |ToggleNoView|,
+%  |LockedContents| which correspond to the names used in the PDF references.
+% \end{variable}
+% \end{documentation}
+%
+% \begin{implementation}
+%
+% \section{\pkg{l3pdfannot} implementation}
+%
+%    \begin{macrocode}
+%<@@=pdfannot>
+%<*header>
+\ProvidesExplPackage {l3pdfannot} {2021-02-22} {0.95a}
+  {PDF-annotations}
+\RequirePackage{l3pdfdict}
+%</header>
+%    \end{macrocode}
+% Annotations have a /F flag, we provide a public
+% bitset for it.
+%    \begin{macrocode}
+%<*package>
+\RequirePackage{l3bitset}
+\bitset_new:Nn \l_pdfannot_F_bitset
+  {
+    Invisible      = 1,
+    Hidden         = 2,
+    Print          = 3,
+    NoZoom         = 4,
+    NoRotate       = 5,
+    NoView         = 6,
+    ReadOnly       = 7,
+    Locked         = 8,
+    ToggleNoView   = 9,
+    LockedContents = 10
+  }
+%    \end{macrocode}
+% \begin{NOTE}{UF}
+% The code/naming tries to unify general annotations and the special type of
+% link under a common name.
+% regarding naming and relation of annotation commands see
+% https://github.com/FrankMittelbach/AccessiblePDF/issues/73
+% \subsection{Annotations / backend}
+% The backend commands are in l3backend:
+% \cs{__pdf_backend_annotation:nnnn} and \cs{__pdf_backend_annotation_last:}
+% \cs{__pdf_backend_link_begin_user:nnw}, etc
+% \end{NOTE}
+%
+% \subsection{ General Annotations }
+% \begin{variable}
+%  { \g_@@_use_lastlink_bool }
+% The pdf engines have two different primitive commands to refer to the last created
+% annotation: one for links, one for boxed annotation. We use a boolean to decide
+% which one should be used, so that only one user command is needed.
+%    \begin{macrocode}
+\bool_new:N \g_@@_use_lastlink_bool
+%    \end{macrocode}
+% \end{variable}
+% \begin{NOTE}{UF}
+%  type or not type? Syntax for type?
+%  should there be a version without type?
+% \end{NOTE}
+
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfannot_box:nnnn #1 #2 #3 #4
+  {
+    \__pdf_backend_annotation:nnnn {#1}{#2}{#3}{#4}
+    \bool_gset_false:N\g_@@_use_lastlink_bool
+  }
+
+\cs_new:Npn \pdfannot_box_ref_last:
+  {
+    \__pdf_backend_annotation_last:
+  }
+
+\cs_new_protected:Npn \pdfannot_box:nnnnn #1 #2 #3 #4 #5
+  {
+    \exp_args:Nx
+    \__pdf_backend_annotation:nnnn {#2}{#3}{#4}
+      {
+        \pdfdict_if_exist:nT { l_@@/#1 }
+          {
+            \pdfdict_use:n { l_@@/#1}
+          }
+        #5
+      }
+    \bool_gset_false:N\g_@@_use_lastlink_bool
+  }
+%    \end{macrocode}
+% \subsection{Annotations, subtype Widget}\label{pdf:annot:widget}
+% Currently no code is provided here.
+% The local dictionary \texttt{l_@@/Widget} is a skeleton
+% dictionary for this subtype. It currently contains as only entry
+% the subtype setting (the /Type is added by the backend).
+%    \begin{macrocode}
+ \pdfdict_new:n { l_@@/widget }
+ \pdfdict_put:nnn { l_@@/widget }{ Subtype }{ /Widget }
+%    \end{macrocode}
+%
+% \subsection{Annotations, subtype Link}\label{sec:links}
+% The code assumes that there will be different link types
+% (currently URI, GoToR, Launch, GoTo, Named, hyperref uses the names
+% url,file,run,link,menu) and that links of the same type share
+% the \emph{attr spec} and also the same begin/end
+% code. The list of link types need to stay restricted and well documented so that
+% all packages know which types they have to handle. It is stored in a constant
+% seq.
+% \begin{NOTE}{UF}
+% Perhaps a |cite| type will be useful at some time. -- Thinking more about it,
+% a |cite| type is not sensible. hyperref supports it, but it doesn't fit in.
+% Commands like cite, gls, acro, footnote and so on should locally change
+% linkcolor and linkbordercolor.
+% Probably we will need some commands to add an attribute to all link types
+% at once.
+% hyperref commands for the various type:
+% url  |\hyper@linkurl|,
+% file |\hyper@linkfile|,
+% run  |\@hyper@launch run|,
+% link |\hyper@link|, |\find@pdflink|
+% menu |\Acrobatmenu|
+% \end{NOTE}
+% \begin{variable}[added = 2020-03-12]{ \c_pdfannot_link_types_seq }
+% This constant sequence contains the list of currently supported link types
+% for which hooks and dictionaries exist.
+% \end{variable}
+%
+% \begin{variable}
+%   {
+%     link/TYPE,
+%     pdfannot/link/TYPE/before,
+%     pdfannot/link/TYPE/begin,
+%     pdfannot/link/TYPE/end,
+%     pdfannot/link/TYPE/after
+%   }
+% These setup the dictionary and the hook pairs.
+%    \begin{macrocode}
+\seq_const_from_clist:Nn \c_pdfannot_link_types_seq { URI , GoToR , Launch , GoTo, Named }
+\seq_map_inline:Nn \c_pdfannot_link_types_seq
+  {
+    \pdfdict_new:n { l_@@/link/#1 }
+    \hook_new_pair:nn
+      {pdfannot/link/#1/before}
+      {pdfannot/link/#1/after}
+    \hook_new_pair:nn
+      {pdfannot/link/#1/begin}
+      {pdfannot/link/#1/end}
+   }
+%    \end{macrocode}
+% \end{variable}
+% \subsubsection{Annotations, subtype Link /management}
+%
+% \begin{macro}{\pdfannot_link:nnn,\pdfannot_link:nxn}
+%    \begin{macrocode}
+\cs_new_protected:Nn \pdfannot_link:nnn %#1 type (URI, GoTo etc),
+                                        %#2 action spec, #3 link text
+  {
+    \hook_use:n { pdfannot/link/#1/before}
+    \mode_leave_vertical:
+    \exp_args:Nxx %xetex needs expansion
+    \__pdf_backend_link_begin_user:nnw
+      {
+         \pdfdict_if_exist:nT { l_@@/link/#1 }
+          {
+            \pdfdict_use:n { l_@@/link/#1}
+          }
+      }
+      {
+        /Subtype/Link
+        #2 %exp_not?
+      }
+    \bool_gset_true:N \g_@@_use_lastlink_bool
+    \hook_use:n { pdfannot/link/#1/begin}
+    #3
+    \hook_use:n { pdfannot/link/#1/end}
+    \__pdf_backend_link_end:
+    \bool_gset_true:N \g_@@_use_lastlink_bool
+    \hook_use:n { pdfannot/link/#1/after}
+  }
+\cs_generate_variant:Nn \pdfannot_link:nnn {nxn}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{
+%   \pdfannot_link_begin:nnw,
+%   \pdfannot_link_begin:nxw,
+%   \pdfannot_link_end:n }
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfannot_link_begin:nnw #1 #2 %#1 type, #2 action spec
+  {
+    \hook_use:n { pdfannot/link/#1/before}
+    \mode_leave_vertical:
+    \exp_args:Nxx %xetex needs expansion
+      \__pdf_backend_link_begin_user:nnw
+        {
+           \pdfdict_if_exist:nT { l_@@/link/#1 }
+            {
+              \pdfdict_use:n { l_@@/link/#1}
+            }
+        }
+        { #2 }
+      \bool_gset_true:N \g_@@_use_lastlink_bool
+      \hook_use:n { pdfannot/link/#1/begin}
+  }
+
+\cs_new_protected:Nn \pdfannot_link_end:n %#1 type, e.g. url
+  {
+    \hook_use:n { pdfannot/link/#1/end}
+    \__pdf_backend_link_end:
+    \bool_gset_true:N \g_@@_use_lastlink_bool
+    \hook_use:n { pdfannot/link/#1/after}
+  }
+\cs_generate_variant:Nn \pdfannot_link_begin:nnw {nxw}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\pdfannot_link_goto_begin:nw, \pdfannot_link_goto_end:}
+%     \begin{macrocode}
+\cs_new_protected:Npn \pdfannot_link_goto_begin:nw #1 %#1 destination
+  {
+    \hook_use:n { pdfannot/link/GoTo/before}
+    \mode_leave_vertical:
+    \exp_args:Nxx %xetex needs expansion
+    \__pdf_backend_link_begin_goto:nnw
+      {
+        \pdfdict_use:n { l_@@/link/GoTo}
+      }
+      { #1 }
+     \bool_gset_true:N \g_@@_use_lastlink_bool
+     \hook_use:n { pdfannot/link/GoTo/begin}
+  }
+
+\cs_new_protected:Nn \pdfannot_link_goto_end:
+  {
+    \hook_use:n { pdfannot/link/GoTo/end}
+    \__pdf_backend_link_end:
+    \bool_gset_true:N \g_@@_use_lastlink_bool
+     \hook_use:n { pdfannot/link/GoTo/after}
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}[EXP]{\pdfannot_link_ref_last:, \pdfannot_ref_last:}
+%    \begin{macrocode}
+\cs_new:Nn \pdfannot_link_ref_last: { \__pdf_backend_link_last: }
+%    \end{macrocode}
+%    \begin{macrocode}
+\cs_new:Npn \pdfannot_ref_last:
+  {
+    \bool_if:NTF \g_@@_use_lastlink_bool
+      {
+        \__pdf_backend_link_last:
+      }
+      {
+        \__pdf_backend_annotation_last:
+      }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{ \pdfannot_link_margin:n}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfannot_link_margin:n #1
+  {
+    \__pdf_backend_link_margin:n { #1 }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}
+%   {
+%     \pdfannot_dict_put:nnn,
+%     \pdfannot_dict_put:nnx,
+%     \pdfannot_dict_remove:nn,
+%     \pdfannot_dict_show:n
+%   }
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfannot_dict_put:nnn #1 #2 #3
+  {
+    \pdfdict_put:nnn { l_@@/#1 } { #2 }{ #3 }
+  }
+\cs_generate_variant:Nn \pdfannot_dict_put:nnn {nnx}
+%    \end{macrocode}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfannot_dict_remove:nn #1 #2
+  {
+    \pdfdict_remove:nn { l_@@/#1 } { #2 }
+  }
+%    \end{macrocode}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfannot_dict_show:n #1
+  {
+    \pdfdict_show:n { l_@@/#1 }
+  }
+%</package>
+%    \end{macrocode}
+% \end{macro}
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfdict.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfdict.dtx
new file mode 100644
index 00000000000..558b721ca57
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfdict.dtx
@@ -0,0 +1,591 @@
+% \iffalse meta-comment
+%
+%% File: l3pdfdict.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,
+  pdftitle=l3pdfdict (LaTeX PDF management testphase bundle)}
+
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+% \title{^^A
+%   The \pkg{l3pdfdict} module---tools for PDF dictionaries ^^A
+%   \\
+%   \LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{l3pdfdict} documentation}
+% Many PDF objects are or contain dictionaries---structures
+% containing a number of \mbox{(pdf-)}name/value pairs.
+% Examples are attributes of links,
+% filespec dictionaries, xform dictionaries, the catalog, the info dictionary.
+% The commands in this module offer an number of
+% tools to handle such dictionaries. The module setups a name space for the
+% dictionary names and offers some commands to output dictionaries.
+%
+% The dictionaries work in many respects
+% like property lists with a few PDF specific changes:
+% \begin{itemize}
+% \item The keys are always converted with \cs{str_convert_pdfname:n}
+% to get a correct PDF name;
+% \item a key with a empty value can not be added, it will be ignored;
+% \item there is a dedicated function to output the property as space
+% separated list with keys with slash: \texttt{/key1 value1 /key2 value2}.
+% \end{itemize}
+% Local and global dictionaries can be created.
+%
+% \subsection{User Commands}
+% \begin{function}[updated = 2020-12-03]
+%   {\pdfdict_new:n}
+%   \begin{syntax}
+%     \cs{pdfdict_new:n} \Arg{dictionary name}
+%   \end{syntax}
+% This function create a new local or global dictionary. Which one depends on
+% \meta{dictionary name}: If it begins with the standard |g| the dictionary is global,
+% with |l| the dictionary is local, other starting chars will give an error.
+% It is recommended to begin the name in the standard expl3 naming scheme
+% with one or two underscores and a module name,
+% so |g_module_XXXX| or |g__module_XXXX|.
+% \end{function}
+%
+% \begin{function}[added = 2020-06-16,updated = 2020-12-03]
+%   {\pdfdict_set_eq:nn,\pdfdict_gset_eq:nn}
+%   \begin{syntax}
+%     \cs{pdfdict_set_eq:nn}  \Arg{local dictionary name_1} \Arg{dictionary name_2}\\
+%     \cs{pdfdict_gset_eq:nn} \Arg{global dictionary name_1}\Arg{dictionary name_2}
+%   \end{syntax}
+% This functions copy \meta{dictionary name_2} into
+% \meta{local/global dictionary name_1} locally or globally. If the
+% dictionary \meta{local/global dictionary name_1} doesn't exist yet, it will be created.
+% If \meta{dictionary name_2} doesn't exist yet, an error will be raised.
+% \end{function}
+%
+% \begin{function}[added = 2020-04-06]
+%   {\pdfdict_put:nnn, \pdfdict_gput:nnn}
+%   \begin{syntax}
+%     \cs{pdfdict_put:nnn}  \Arg{local dictionary}  \Arg{name} \Arg{value} \\
+%     \cs{pdfdict_gput:nnn} \Arg{global dictionary} \Arg{name} \Arg{value}
+%   \end{syntax}
+% This function puts key \meta{name} and value \meta{value} locally or globally in the
+% \meta{dictionary} created with \cs{pdfdict_new:n}.
+% \Arg{name} should be a PDF Name without the starting slash. It will be stored
+% with \cs{str_convert_pdfname:n}, so will be automatically correctly escaped in case
+% it contains slashes, spaces or other chars not allowed in a PDF name.
+% \meta{value} should be a valid PDF value for this name in the
+% target dictionary. The value is \emph{neither} converted \emph{nor} escaped automatically.
+% If the value is blank nothing is added to the dictionary.
+%
+% When adding a value keep in mind that the expansion behaviour
+% of the backends differ. Some backends expand a
+% value always fully when writing to the PDF, with other backends commands
+% could end as strings in the PDF. This makes controlling the
+% expansion quite tricky. It is better to not rely on
+% \meta{value} to be expanded nor not expanded by the backend commands.
+% \end{function}
+%
+% \begin{function}[EXP,added = 2020-12-04]
+%   { \pdfdict_item:nn, \pdfdict_item:ne  }
+%   \begin{syntax}
+%     \cs{pdfdict_item:nn} \Arg{key} \Arg{value}
+%   \end{syntax}
+% A simple command to output key-value as |/key value|. This is
+% needed to output dictionaries in mapping commands. The command doesn't
+% do any escaping, it expects that the name has been escaped when the value
+% has been stored into the dictionary.
+% If the value is blank nothing is output.
+% The command is expandable if the content is it.
+% \end{function}
+%
+% \begin{function}[EXP,updated = 2020-12-03]
+%   { \pdfdict_use:n  }
+%   \begin{syntax}
+%     \cs{pdfdict_use:n} \Arg{dictionary}
+%   \end{syntax}
+%   This outputs the property list of the dictionary as a list of
+%   |/key value| pairs.
+%   This can be used e.g. when writing a dictionary object with
+%   \cs{pdf_object_write:nx}
+% \end{function}
+%
+% \begin{function}[updated = 2020-12-03]
+%   {\pdfdict_show:n }
+%   \begin{syntax}
+%     \cs{pdfdict_show:n}  \Arg{dictionary}
+%   \end{syntax}
+%   This shows the content of \meta{dictionary} in the log and on the terminal.
+% \end{function}
+%\begin{function}[EXP, pTF,updated = 2020-12-03]
+%   { \pdfdict_if_exist:n  }
+%   \begin{syntax}
+%     \cs{pdfdict_if_exist:n} \Arg{dictionary}
+%   \end{syntax}
+%   This tests if the dictionary exists.
+% \end{function}
+% \begin{function}[EXP, pTF,updated = 2020-12-03]
+%   { \pdfdict_if_empty:n }
+%   \begin{syntax}
+%     \cs{pdfdict_if_empty:n} \Arg{dictionary}
+%   \end{syntax}
+%   This tests if the dictionary is empty. The result is false if the
+%   dictionary doesn't exist.
+% \end{function}
+% \begin{function}[added = 2020-07-06]
+%   {\pdfdict_get:nnN }
+%   \begin{syntax}
+%     \cs{pdfdict_get:nnN} \Arg{dictionary}  \Arg{name} \meta{tl var}
+%   \end{syntax}
+%   Recovers the \meta{value} stored by \cs{pdfdict_put:nnn} or
+%   \cs{pdfdict_gput:nnn}
+%   for \meta{name} and places this in the \meta{token list
+%   variable}. If \meta{name} is not found
+%   then the \meta{token list variable} is set
+%   to the special marker \cs{q_no_value}. \meta{name} is first converted
+%   with \cs{str_convert_pdfname:n}.  The \meta{token list
+%   variable} is set within the current \TeX{} group.
+% \end{function}
+%
+% \begin{function}[updated = 2020-12-03]
+%   {
+%     \pdfdict_remove:nn, \pdfdict_gremove:nn
+%   }
+%   \begin{syntax}
+%     \cs{pdfdict_remove:nn}  \Arg{local dictionary}  \Arg{name}\\
+%     \cs{pdfdict_gremove:nn} \Arg{global dictionary} \Arg{name}
+%   \end{syntax}
+%   Removes  \meta{name} and its associated \meta{value} from
+%   the \Arg{dictionary}
+%   The removal is local from local dictionaries
+%   and global from global dictionaries.
+%   If \meta{name} is not found no change occurs,
+%   \emph{i.e}~there is no need to test for the existence of a name before
+%   trying to remove it. \meta{name} is first converted
+%   with \cs{str_convert_pdfname:n}.
+% \end{function}
+% \end{documentation}
+%
+% \begin{implementation}
+% \section{\pkg{l3pdfdict} implementation}
+%    \begin{macrocode}
+%<@@=pdfdict>
+%<*header>
+\ProvidesExplPackage {l3pdfdict} {2021-02-22} {0.95a}
+  {Tools for PDF dictionaries (LaTeX PDF management testphase bundle)}
+%</header>
+%    \end{macrocode}
+% \subsection{messages}
+%    \begin{macrocode}
+%<*package>
+\cs_new:Npn \@@_get_type:n #1
+  {
+    \str_case_e:nn { \str_head:n{#1} }
+     {
+       {g}{global}
+       {l}{local}
+     }
+  }
+\msg_new:nnn  { pdfdict } { show-dict }
+  { %#1: name of the dictionary
+    %#2: expanded content
+    %#3: type
+    The~#3~dictionary~'#1'~
+    \tl_if_empty:nTF {#2}
+      { is~empty \\>~ . }
+      { contains~the~pairs~(without~outer~braces): #2 . }
+  }
+\msg_new:nnn  { pdfdict } { unknown-dict }
+  {
+    The~dictionary~'#1'~is~unknown.
+  }
+\msg_new:nnn  { pdfdict } { dict-already-defined  }
+  {
+    The~#2~dictionary~'#1'~is~already~defined.
+  }
+\msg_new:nnn  { pdfdict } { empty-value }
+              { The~value~#1~for~#2~is~blank~and~will~be~ignored }
+
+\msg_new:nnn  { pdfdict } { invalid-name }
+              { Name~'#1'~is~not~valid\\
+                Names~of~dictionaries~should~start~with~'g_'~or~'l_' }
+
+%    \end{macrocode}
+%
+
+% \subsection{Creating dictionaries}
+% \begin{variable}
+%    {\g_@@_names_seq,\g_@@_gnames_seq}
+% Two seq to store the used names for diagnostics.
+%    \begin{macrocode}
+\seq_new:N \g_@@_lnames_seq
+\seq_new:N \g_@@_gnames_seq
+%    \end{macrocode}
+% \end{variable}
+%
+% \begin{macro}
+%   {
+%    \@@_name:n, \__kernel_pdfdict_name:n,
+%    \@@_new:n,  \pdfdict_new:n,
+%   }
+%
+%   This are the commands to create new dictionaries and to access their internal
+%   name. All internal names start with |g__pdfdict_/| or |l__pdfdict_/|.
+%
+%  For the other modules we also need a kernel command to access the internal
+%  name to speed up the code and allow the use standard commands
+%  of the \texttt{prop} module to deal with the dictionaries. For example\\
+%  |\prop_clear:c { \__kernel_pdfdict_name:n { name }}|
+%
+%    \begin{macrocode}
+\cs_new:Npn \@@_name:n #1  % #1 dictionary name
+  {
+    \str_head:n{#1}_@@_/#1_prop
+  }
+\cs_set_eq:NN \__kernel_pdfdict_name:n \@@_name:n
+
+\cs_new_protected:Npn \@@_new:n #1
+  {
+    \@@_if_exist:nTF { #1 }
+      {
+        \msg_error:nnxx
+          { pdfdict }
+          { dict-already-defined }
+          { \tl_to_str:n {#1} }
+          { \@@_get_type:n{#1} }
+       }
+       {
+         \str_case_e:nnF { \str_head:n{#1} }
+           {
+             {g}
+             {
+                 \prop_new:c  { \@@_name:n { #1 } }
+                 \seq_gput_right:cn {g_@@_gnames_seq} { #1 }
+             }
+             {l}
+             {
+                 \prop_new:c  { \@@_name:n { #1 } }
+                 \seq_gput_right:cn {g_@@_lnames_seq} { #1 }
+             }
+           }
+           {
+             \msg_error:nnx{pdfdict}{invalid-name}{\tl_to_str:n{#1}}
+           }
+       }
+  }
+
+\cs_set_eq:NN \pdfdict_new:n \@@_new:n
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}
+%   {
+%     \@@_set_eq:nn,\pdfdict_set_eq:nn,
+%     \@@_gset_eq:nn,\pdfdict_gset_eq:nn
+%   }
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_set_eq:nn #1 #2
+  {
+    \@@_if_exist:nTF  { #2 }
+      {
+        \@@_if_exist:nF { #1 }
+          {
+            \@@_new:n { #1 }
+          }
+        \prop_set_eq:cc { \@@_name:n {#1} }{ \@@_name:n {#2} }
+      }
+      {
+         \msg_error:nnn { pdfdict } { unknown-dict } { #1 }
+      }
+  }
+
+\cs_set_eq:NN \pdfdict_set_eq:nn \@@_set_eq:nn
+
+\cs_new_protected:Npn \@@_gset_eq:nn #1 #2
+  {
+    \@@_if_exist:nTF { #2 }
+      {
+        \@@_if_exist:nF { #1 }
+          {
+            \@@_new:n { #1 }
+          }
+        \prop_gset_eq:cc { \@@_name:n {#1} }{ \@@_name:n {#2} }
+      }
+      {
+         \msg_error:nnn { pdfdict } { unknown-dict } { #1 }
+      }
+  }
+
+\cs_set_eq:NN \pdfdict_gset_eq:nn \@@_gset_eq:nn
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \begin{macro}
+%   {
+%     \@@_if_exist:n,  \pdfdict_if_exist:n,
+%   }
+%
+% Existence tests.
+%    \begin{macrocode}
+%local
+\prg_new_conditional:Npnn \@@_if_exist:n #1 { p , T , F , TF }
+  {
+    \prop_if_exist:cTF
+      { \@@_name:n { #1 }  }
+      { \prg_return_true:  }
+      { \prg_return_false: }
+  }
+\prg_set_eq_conditional:NNn
+  \pdfdict_if_exist:n \@@_if_exist:n { p , T , F , TF }
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \begin{macro}
+%   {
+%     \@@_if_empty:n,  \pdfdict_if_empty:n,
+%   }
+%
+% Tests for emptiness.
+%    \begin{macrocode}
+\prg_new_conditional:Npnn \@@_if_empty:n #1 { p , T , F , TF }
+  {
+    \prop_if_empty:cTF
+      { \@@_name:n { #1 } }
+      { \prg_return_true:  }
+      { \prg_return_false: }
+  }
+
+\prg_set_eq_conditional:NNn
+  \pdfdict_if_empty:n \@@_if_empty:n { p , T , F , TF }
+%    \end{macrocode}
+%  \end{macro}
+%
+%
+% \begin{macro}
+%   {
+%     \@@_put:nnn, \pdfdict_put:nnn,
+%     \@@_gput:nnn,\pdfdict_gput:nnn
+%   }
+% These are the commands to store values into the dictionaries.
+% The main difference to adding values to a normal property list is,
+% that the keys are converted with \cs{str_convert_pdfname:n}
+% and that empty values are ignored.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_put:nnn #1 #2 #3  %#1 (local) dict, #2 name, #3 value
+  {
+    \tl_if_blank:nTF { #3 }
+      {
+        \msg_warning:nnnn { pdfdict }{ empty-value }{ #2 } { #1 }
+      }
+      {
+        \@@_if_exist:nTF  { #1 }
+          {
+            \exp_args:Nnx \prop_put:cnn
+              { \@@_name:n { #1 } }{ \str_convert_pdfname:n { #2 } } { #3 }
+          }
+          {
+            \msg_error:nnn { pdfdict } { unknown-dict } { #1 }
+          }
+      }
+  }
+
+\cs_set_eq:NN \pdfdict_put:nnn \@@_put:nnn
+\cs_generate_variant:Nn \pdfdict_put:nnn {nnx,nno}
+
+\cs_new_protected:Npn \@@_gput:nnn #1 #2 #3  %#1 global dict, #2 name, #3 value
+  {
+    \tl_if_empty:nTF { #3 }
+      {
+        \msg_warning:nnnn { pdfdict }{ empty-value }{ #2 } { #1 }
+      }
+      {
+        \@@_if_exist:nTF { #1 }
+          {
+            \exp_args:Nnx \prop_gput:cnn
+              { \@@_name:n { #1 } }{ \str_convert_pdfname:n { #2 } } { #3 }
+          }
+          {
+            \msg_error:nnn { pdfdict } { unknown-dict } { #1 }
+          }
+      }
+  }
+
+\cs_set_eq:NN \pdfdict_gput:nnn \@@_gput:nnn
+\cs_generate_variant:Nn \pdfdict_gput:nnn {nnx,nno}
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}
+%   {
+%     \@@_get:nnN, \pdfdict_get:nnN,
+%   }
+% Recover the values. The name must be first escaped to match the stored name.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_get:nnN  #1 #2 #3 %dict,key,macro
+  {
+    \@@_if_exist:nTF { #1 }
+      {
+        \exp_args:Nnx \prop_get:cnN
+          { \@@_name:n { #1 } }
+          { \str_convert_pdfname:n { #2 } } #3
+      }
+      {
+        \msg_error:nnn { pdfdict } { unknown-dict } { #1 }
+      }
+  }
+
+\cs_set_eq:NN \pdfdict_get:nnN \@@_get:nnN
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}
+%   {
+%     \@@_remove:nn, \pdfdict_remove:nn,
+%     \@@_gremove:nn,\pdfdict_gremove:nn
+%   }
+% This removes a name/value pair from a dictionary.
+% The name has to be passed through the escaping.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_remove:nn #1 #2 %dict,name
+  {
+    \@@_if_exist:nTF { #1 }
+      {
+        \exp_args:Nnx \prop_remove:cn
+          { \@@_name:n  { #1 } }{ \str_convert_pdfname:n { #2 } }
+      }
+      {
+        \msg_error:nnn { pdfdict } { unknown-dict } { #1 }
+      }
+  }
+\cs_set_eq:NN \pdfdict_remove:nn \@@_remove:nn
+
+\cs_new_protected:Npn \@@_gremove:nn #1 #2 %dict,name
+  {
+    \@@_if_exist:nTF  { #1 }
+       {
+         \exp_args:Nnx \prop_gremove:cn
+           { \@@_name:n  { #1 } }{ \str_convert_pdfname:n { #2 } }
+       }
+       {
+         \msg_error:nnn { pdfdict } { unknown-dict } { #1 }
+       }
+  }
+
+\cs_set_eq:NN \pdfdict_gremove:nn \@@_gremove:nn
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}
+%   { \@@_show:Nn, \pdfdict_show:n }
+% This allows to show the content of dictionaries. It also displays if a
+% dictionary is local or global. If both exists both are shown.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_show:Nn #1#2 %#1 message command, #2 dict
+  {
+    \prop_if_exist:cTF { \@@_name:n { #2 } }
+       {
+         #1
+            { pdfdict }
+            { show-dict }
+            { \tl_to_str:n {#2}  }
+            { \prop_map_function:cN {\@@_name:n { #2 }} \msg_show_item:nn }
+            { \@@_get_type:n{#2} }
+            { }
+       }
+       {
+         #1 { pdfdict } { unknown-dict } { #2 } {}{}{}
+       }
+  }
+\cs_new_protected:Npn \pdfdict_show:n #1
+  {
+    \@@_show:Nn \msg_show:nnxxxx {#1}
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \begin{macro}{\@@_item:nn, \@@_item:ne}
+% \begin{macro}{\pdfdict_item:nn, \pdfdict_item:ne}
+%   \begin{macrocode}
+\cs_new:Npn \@@_item:nn #1 #2 %#1 name, #2 value
+  {
+    \tl_if_blank:nF {#2} { /#1~#2~ }
+  }
+\cs_generate_variant:Nn \@@_item:nn {ne}
+\cs_set_eq:NN \pdfdict_item:nn \@@_item:nn
+\cs_generate_variant:Nn \pdfdict_item:nn {ne}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+%
+% \begin{macro}
+%   {
+%     \@@_use:n,\pdfdict_use:n
+%   }
+% \cs{@@_use:n} outputs a prop as needed in a dictionary:
+%  as a list of /\meta{key} \meta{value} pairs.
+% \begin{NOTE}{UF}
+%  !! is e-expansion the right thing?
+% \end{NOTE}
+%    \begin{macrocode}
+\cs_new:Npn \@@_use:n #1  %#1 dict
+  {
+    \prop_map_function:cN { \@@_name:n { #1 } } \@@_item:ne
+  }
+
+\cs_set_eq:NN \pdfdict_use:n \@@_use:n
+%    \end{macrocode}
+% \end{macro}
+%
+%
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdffile.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdffile.dtx
new file mode 100644
index 00000000000..c1a2a25591d
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdffile.dtx
@@ -0,0 +1,746 @@
+% \iffalse meta-comment
+%
+%% File: l3pdffile.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the package can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=l3pdffile (LaTeX PDF management testphase bundle)}
+
+\providecommand\potentialclash{\noindent\llap{\dbend\ }}
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \title{^^A
+%   The \pkg{l3pdffile} module\\ Embedding and referencing files in a PDF ^^A
+%   \\ \LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{l3pdffile} documentation}
+% \subsection{Introduction}
+% \subsubsection{Background}
+% External files can be referenced from a PDF in three ways:
+% \begin{enumerate}
+% \item through an annotation of type Link,
+% \item by referencing a local file in the file system,
+% \item by embedding the file directly into the PDF
+% \end{enumerate}
+% Case 1 (Links) are created with the \cs{pdfannot} commands.
+% This module handles the two other cases. Actually from the view
+% of the PDF format they are quite similar: Case 2 is case 3 without the stream
+% object and without the /EF entry in the /FileSpec dictionary (this points to the
+% stream object of the file). Not embedding the file makes the PDF smaller. But it is
+% also less portable: the files can only be found if they are in the right location
+% relative to the PDF. The normal case is to embed the file.
+%
+% The tasks to embed and reference such a file are
+% \begin{enumerate}
+% \item Embed the file in a stream.
+% \item Create a FileSpec dictionary which references the stream object in the /EF
+% dictionary:
+% \begin{verbatim}
+%  <<
+%   /Type /Filespec
+%   /F  (l3pdffile.dtx)
+%   /UF (l3pdffile.dtx)
+%   /AFRelationship /Source
+%   /EF <</F 21 0 R /UF 21 0 R>>   %case 3, embedded file
+%  >>
+% \end{verbatim}
+% The file names in the /UF and /F value don't need to be identical to the
+% name of file on the disc. It is quite possible to embed a \texttt{zzz.tex}
+% and name it \texttt{blub.tex}. The second name is then what the user will see
+% in the attachment list or in the properties of an annotation.
+%
+%\item Reference the FileSpec dictionary so that the user can access the file.
+%   This can be done in various way:
+%   \begin{enumerate}
+%      \item With an annotation (/Subtype/FileAttachment). This is done by
+%       \pkg{attachfile}, \pkg{attachfile2} and \pkg{intopdf}.
+%       Typical entries of such an annotation are:
+%
+% \medskip
+%             \begin{tabular}{lll}
+%             key      & value type  & notes\\\hline
+%             /FS       & object reference &(FileSpec dictionary)\\
+%             /Name     & name        & /Graph, /PushPin, /Paperclip, /Tag\\
+%             /Contents & text string & optional but recommended\\
+%             /F        & integer     & Flags\\
+%             /AP       & dictionary  & Appearance (required if rectangle >0) \\
+%             /AS       & name\\
+%             \end{tabular}
+%
+%             The |/AP| takes precedence over Border and similar keys.
+%      \item Through an entry in the |/EmbeddedFiles| name tree.
+%       This is what \pkg{embedfiles} does.
+%       \begin{verbatim}
+%       20 0 obj %Document Name tree
+%        <</EmbeddedFiles 21 0 R>>
+%           endobj
+%         21 0 obj %Embedded Files Name dictionary
+%        <</Names [(AcmeCustomCrypto Protected PDF.pdf) 17 0 R]>>
+%        endobj
+%       \end{verbatim}
+%       The strings (keys) in the |/Names| dictionary must be sorted lexically.
+%       But they don't have to be the file name or anything related to
+%       the file name. The resource management code uses l3emb0001, l3emb0002~\ldots,
+%       which allows up to 9999 files.
+%       The key can be needed to identify the start file in a collection,
+%       so their relation to the files are stored in a property list.
+%
+%      \item Through the |/AF| key in various objects (pdf 2.0).
+%       The value is normally an array of object
+%       references, but it can also be a name which is mapped to an array in /Properties:
+%        \begin{verbatim}
+%        /AF /NamedAF BDC
+%        /Properties <</NamedAF [12 0 R]
+%        \end{verbatim}
+%        The related |/FileSpec| dictionary should contain an
+%        |/AFRelationship| key in this case (but it doesn't harm to add it by
+%        default anyway). The values of this key is describe in table~\ref{tab:AFrel}.
+%
+% \begin{table}
+%       \caption{Values of the \texttt{/AFRelationship} key\label{tab:AFrel}}
+%       \begin{tabular}{lp{8cm}}
+%       Source  & shall be used if this file specification is the original
+%                source material for the associated content.\\
+%       Data    & shall be used if this file specification represents
+%                 information used to
+%                 derive a visual presentation – such as for a table or a graph.\\
+%       Alternative & shall be used if this file specification is an
+%               alternative representation of content, for example audio.\\
+%       Supplement & shall be used if this file specification represents
+%       a supplemental representation of the original source or data
+%       that may be more easily consumable
+%       (e.g., A MathML version of an equation).\\
+%       EncryptedPayload & shall be used if this file specification
+%       is an encrypted payload document that should be displayed to the user
+%       if the PDF processor has the cryptographic filter
+%       needed to decrypt the document.\\
+%       FormData & shall be used if this file specification
+%       is the data associated with the AcroForm
+%       (see 12.7.3, \enquote{Interactive form dictionary}) of this PDF.\\
+%       Schema & shall be used if this file specification is a schema
+%       definition for the associated object
+%       (e.g. an XML schema associated with a metadata stream).\\
+%       Unspecified &(default value) shall be used when the
+%       relationship is not known
+%       or cannot be described using one of the other values.\\
+%       Other names & Second-class names (see Annex E,
+%       \enquote{(normative) PDF Name Registry}) should be used to
+%       represent other types of relationships.
+%       \end{tabular}
+% \end{table}
+%      \end{enumerate}
+% \end{enumerate}
+%
+% \subsubsection{Task 1: Embedding a file}
+% Embedding an existing file is in most cases quite straightforward. This module
+% offers commands, but it can also be done with the basic commands
+% from the |l3pdf| module \cs{pdf_object_unnamed_write:nn} or
+% \cs{pdf_object_new:nn}/\cs{pdf_object_write:nn} or primitive commands
+% to create objects.
+% The object number should be stored for the reference
+% in the |/FileSpec| dictionary.
+%
+% \begin{verbatim}
+% \pdf_object_unnamed_write:nx {fstream}
+%   {
+%     {
+%       /Type /EmbeddedFile
+%       /Subtype /application\c_hash_str2Fpostscript
+%       /Params
+%         <<
+%           /ModDate  ~ (\file_timestamp:n{example-image.eps})
+%           /Size     ~  \file_size:n {example-image.eps}
+%           /CheckSum ~ (\file_mdfive_hash:n {example-image.eps})
+%          >>
+%     }
+%     {example-image.eps}
+%   }
+% \tl_set:Nx \l_my_fileobj_tl {\pdf_object_ref_last:}
+% \end{verbatim}
+%
+% \begin{itemize}
+% \item The |/Params| dictionary is not always required, but the commands of
+% these module will prefill them as shown in the examples. A |/CreationDate| entry
+% has to be added explicitly as there is no sensible way
+% to retrieve this automatically.
+% \item The mimetype (in the |/Subtype|) should be properly escaped.
+% This module contains a property list with maps a number of file extensions
+% to mimetypes and the commands try to detect and fill the mimetype automatically.
+% \item The dictionary can contain additional keys (|/Filter|, |/DecodeParms|),
+% see the pdf reference.
+% \end{itemize}
+%
+% \subsubsection{Task 2: Creating the \texttt{/FileSpec} dictionary}
+% The |/FileSpec| dictionary is a simple dictionary object, and can also
+% be created in various ways. If it refers to an embedded file it should
+% reference it in the |/EF| key.
+%
+% \subsubsection{Task 3: Referencing the \texttt{/FileSpec} dictionary}
+%
+% Using the dictionary reference in annotations and |/AF| keys is unproblematic.
+%
+% \potentialclash
+% But to add it to the |/EmbeddedFiles| name tree so that it appears in the
+% attachment panel requires special care:
+% This name tree is a global resource and uncoordinated access can lead to
+% clashes and files that are not visible or inaccessible.
+% The access here is managed by the \pkg{l3pdfmanagement} module:\\[\smallskipamount]%
+% |\pdfmanagement_add:nnx{Catalog/Names}{EmbeddedFiles}{|\meta{objref}|}|
+%
+% \subsection{Commands and tools of these module}
+% \begin{function}{file, file/Params, file/streamParams,file/FileSpec}
+% The module predefines and uses a number of local dictionaries for the
+% components of the stream and the |/FileSpec| object. These dictionaries are
+% then used by the \cs{pdffile_embed_XX}.
+% The content of these dictionaries can be changed by users with the commands
+% from the \pkg{l3pdfdict} module, but it should be done only locally
+% to avoid side effects on uses by other packages/commands.
+
+% The preset values are of these dictionaries are shown in table~\ref{tab:filedict}.
+% \end{function}
+% \begin{table}
+% \caption{Preset values in the file dictionaries\label{tab:filedict}}
+% \begin{tabular}{lll}
+% dictionary & key      & value \\\hline
+% l\_pdffile       & Type     & /EmbeddedFile\\
+% l\_pdffile/Params& Size     & |\file_size:n{\l_pdffile_source_name_str}|\\
+% l\_pdffile/Params& ModDate  & |(\file_timestamp:n {\l_pdffile_source_name_str})|\\
+% l\_pdffile/Params& CheckSum & |(\file_mdfive_hash:n{\l_pdffile_source_name_str})|\\
+% l\_pdffile/streamParams&    &  a /ModDate entry with year/month/date  (used with \cs{pdffile_embed_stream:nnn})\\
+% l\_pdffile/FileSpec & Type  & /FileSpec\\
+% l\_pdffile/FileSpec & AFRelationship &Unspecified
+% \end{tabular}
+% \end{table}
+% \begin{function}{\pdffile_embed_file:nnn}
+%   \begin{syntax}
+%     \cs{pdffile_embed_file:nnn} \Arg{source filename} \Arg{target filename} \Arg{object name }
+%   \end{syntax}
+%   This commands embeds the file \meta{source filename} in the PDF,
+%   and creates a |/FileSpec| dictionary object named \meta{object name}.
+%   The object name must be unique.
+%   The command uses the content of the local
+%   dictionaries |l_pdffile|, |l_pdffile/Params| and |l_pdffile/FileSpec|
+%   to setup the dictionary entries of the stream object and the
+%   |/FileSpec| dictionary. The |/F| and |/UF| entry are filled
+%   with \meta{target filename}.
+%
+%   It is an error if both \meta{target filename} and \meta{source filename}
+%   are empty.
+%
+%   If \meta{target filename} is empty \meta{source filename} is used instead.
+%
+%   If \meta{source filename} is empty, only a |/FileSpec| dictionary is
+%   created.
+%
+%   If the |l_pdffile| dictionary doesn't  contain a
+%   Subtype entry with the mimetype, the command tries to guess it
+%   from the file extension of \meta{source filename}. Unknown file extensions can be
+%   added (or known extension be changed) by adding to or changing the value in
+%   the property \cs{g_pdffile_mimetypes_prop}, see below.
+%
+%   When using \texttt{dvips} and \texttt{pstopdf} the actual embedding is
+%   done by \texttt{pstopdf}.  \texttt{pstopdf} will embed files
+%   only if used with the option \texttt{-dNOSAFER} and will not be able
+%   to use files which are found with \texttt{kpathsea}.
+%
+%   \meta{target filename} doesn't need to be a file name with an extension,
+%   but it is recommended as security settings in the pdf
+%   viewer can restrict access to known file types.
+% \end{function}
+%
+% \begin{NOTE}{UF}
+%  we should perhaps also consider the chunk method see pdfbase and
+%  https://chat.stackexchange.com/transcript/message/54181193#54181193
+% \end{NOTE}
+%
+% \begin{function}{\pdffile_embed_stream:nnn}
+%   \begin{syntax}
+%     \cs{pdffile_embed_stream:nnn} \Arg{content} \Arg{target filename} \Arg{object name }
+%   \end{syntax}
+%   This commands embeds the \meta{content} in the PDF in a stream objects and
+%   creates a |/FileSpec| dictionary object named \meta{object name}.
+%   \meta{content} is wrapped in a \cs{exp_not:n}.
+%   The object name must be unique. The command uses the content of the local
+%   dictionaries |l_pdffile|, |l_pdffile/streamParams| and |l_pdffile/FileSpec|
+%   to setup the dictionary entries of the stream object and the /FileSpec dictionary.
+%   The /F and /UF entry are filled with \meta{target filename}.
+%   If \meta{target filename} is empty the fix name \texttt{stream.txt}
+%   is used instead.
+%
+%   If the |l_pdffile| dictionary doesn't  contain a
+%   Subtype entry with the mimetype, the command tries to guess it
+%   from the file extension of \meta{target filename}.
+%
+%   \meta{target filename} doesn't need to be a file name with an extension,
+%   but it is recommended as security settings in the pdf
+%   viewer can restrict access to known file types.
+%
+%   The stream should not be too long, at least PS imposes a size limit for strings.
+% \end{function}
+%
+%  \begin{variable}{\g_pdffile_mimetypes_prop}
+%   This property contains a list of extensions and their mimetypes.
+%   Values can be added or changed with the standard commands:
+%
+%   |\prop_gput:Nnn \g_pdffile_mimetypes_prop {.abc}{text/plain}|
+%
+%   The extension should start with a period, the mimetype should be given
+%   as plain text (it will be escaped internally). Extensions with two periods
+%   are not supported.
+% \end{variable}
+%
+% \begin{variable}{\l_pdffile_source_name_str}
+% This variable is set at the begin of \cs{pdffile_embed_file:nnn}. It can be
+% (and is) used in the file dictionaries, see table~\ref{tab:filedict} for examples.
+% \end{variable}
+%
+% \begin{variable} {\g_pdffile_embed_prop}
+% This property holds a list of embedded files. It is used by the following
+% show command. The keys are the object names, the argument holds a key word,
+% the source file name and the target file name.
+% \end{variable}
+%
+% \begin{function}{\pdffile_embed_show:}
+% This shows the embedded files with their source and target name.
+% \end{function}
+%
+% \subsection{Example}
+% \begin{verbatim}
+% \group_begin:
+% %set the relationship:
+% \pdfdict_put:nnn  {l_pdffile/FileSpec} {AFRelationship}{/Source}
+% %set the description key. The text must first be converted:
+% \pdf_string_from_unicode:nnN {utf16/string}
+%    {this~is~an~odd~description~with~öäü}
+%    \l_tmpa_str
+% \pdfdict_put:nnx  {l_pdffile/FileSpec} {Desc}{\l_tmpa_str}
+% %embeds testinput.txt and calls it grüße.txt
+% \pdffile_embed_file:nnn {testinput.txt}{grüße.txt}{file:example1}
+% %reference it in the panel
+% \pdfmanagement_add:nnx
+%  {Catalog/Names}
+%  {EmbeddedFiles}
+%   {\pdf_object_ref:n{file:example1}}
+% \group_end:
+% \end{verbatim}
+% \end{documentation}
+%
+% \begin{implementation}
+%
+% \section{\pkg{l3pdffile} implementation}
+%
+%    \begin{macrocode}
+%<*header>
+\ProvidesExplPackage {l3pdffile} {2021-02-22} {0.95a}
+  {embedding and referencing files in PDF---LaTeX PDF management testphase bundle}
+\RequirePackage{l3pdftools}  %temporarly!!
+%</header>
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<*package>
+%<@@=pdffile>
+\cs_new_protected:Npn \@@_filename_convert_to_print:nN #1 #2
+  {\pdf_string_from_unicode:nnN {utf16/hex}{#1}{#2}}
+%    \end{macrocode}
+% \subsection{Messages}
+%    \begin{macrocode}
+\msg_new:nnn { pdffile } { file-not-found }
+  {
+    File~'\tl_to_str:n{#1}'~not~found
+  }
+
+\msg_new:nnn { pdffile } { mimetype-missing }
+  {
+    Mime~type~not~set~for~file~'\tl_to_str:n{#1}'
+  }
+
+\msg_new:nnn { pdffile } { target-name-missing }
+  {
+    a~target~name~for~the~/FileSpec~dictionary~is~missing.
+  }
+
+\msg_new:nnn { pdffile } { object-exists }
+  {
+    object~name~'#1'~is~already~used.
+  }
+
+\msg_new:nnn  { pdffile } { show-files }
+  {
+    The~following~files~have~been~embedded\\
+     #1
+  }
+%    \end{macrocode}
+% \begin{variable}
+%   {
+%     \l_@@_tmpa_tl,
+%     \l_@@_tmpb_tl,
+%     \l_@@_tmpa_str,
+%     \l_@@_tmpb_str,
+%     \l_@@_ext_str,
+%     \l_@@_automimetype_tl,
+%     \l_@@_embed_ref_tl
+%   }
+% temporary variables: generic, for extension, subtype, to store the ref.
+% \end{variable}
+%    \begin{macrocode}
+\tl_new:N  \l_@@_tmpa_tl
+\tl_new:N  \l_@@_tmpb_tl
+\str_new:N \l_@@_tmpa_str
+\str_new:N \l_@@_tmpb_str
+\str_new:N \l_@@_ext_str
+\tl_new:N  \l_@@_automimetype_tl
+\tl_new:N  \l_@@_embed_ref_tl
+%    \end{macrocode}
+% \begin{variable} {\g_pdffile_mimetypes_prop}
+% This variable holds common mimetypes. The key is an extension with (one) period,
+% the value the description, e.g. \texttt{text/csv}.
+% \end{variable}
+%    \begin{macrocode}
+\prop_new:N \g_pdffile_mimetypes_prop
+\prop_set_from_keyval:Nn \g_pdffile_mimetypes_prop
+  {
+    ,.csv = text/csv
+    ,.html= text/html
+    ,.dtx = text/plain %or application/x-tex, not in iana.org list
+    ,.eps = application/postscript
+    ,.jpg = image/jpeg
+    ,.mp4 = video/mp4
+    ,.pdf = application/pdf
+    ,.png = image/png
+    ,.tex = text/plain %or application/x-tex, not in iana.org list
+    ,.txt = text/plain
+    ,.sty = text/plain
+  }
+%    \end{macrocode}
+% \begin{variable}
+%  {
+%   \l_pdffile_source_name_str
+%  }
+% \cs{l_pdffile_source_name_str} will be set at the begin of the command and
+% contains the full file name and can be used e.g. with \cs{file_timestamp:n}.
+% \end{variable}
+%    \begin{macrocode}
+\str_new:N  \l_pdffile_source_name_str
+%    \end{macrocode}
+% Here we define and setup the local dictionaries.
+% We add a ModDate to ensure that there is an entry if
+% associated files are used.
+%    \begin{macrocode}
+\pdfdict_new:n { l_pdffile }
+\pdfdict_put:nnn { l_pdffile }{Type}{/EmbeddedFile}
+\pdfdict_new:n { l_pdffile/Params }
+\pdfdict_put:nnn { l_pdffile/Params }
+  {ModDate}  { (\file_timestamp:n { \l_pdffile_source_name_str }) }
+\pdfdict_put:nnn { l_pdffile/Params }
+  {Size}     { \file_size:n { \l_pdffile_source_name_str } }
+\pdfdict_put:nnn { l_pdffile/Params }
+  {CheckSum} { (\file_mdfive_hash:n { \l_pdffile_source_name_str }) }
+\pdfdict_new:n { l_pdffile/streamParams }
+\pdfdict_put:nnn { l_pdffile/streamParams }
+  {ModDate}  {
+               (
+                 D:\int_use:N\c_sys_year_int
+                  \int_compare:nNnT{\c_sys_month_int}<{10}{0}
+                  \int_use:N\c_sys_month_int
+                  \int_compare:nNnT{\c_sys_day_int}<{10}{0}
+                  \int_use:N\c_sys_day_int
+               )
+             }
+\pdfdict_new:n { l_pdffile/FileSpec }
+\pdfdict_put:nnn { l_pdffile/FileSpec }
+  {Type} { /FileSpec }
+\pdfdict_put:nnn { l_pdffile/FileSpec }
+  {AFRelationship} { /Unspecified }
+
+%    \end{macrocode}
+% \begin{variable}{\g_pdffile_embed_prop}
+% we record here the relation\\%
+% \meta{object name} $\Rightarrow$
+%  \Arg{file/stream or empty}\Arg{sourcename}\Arg{targetname}
+%
+%    \begin{macrocode}
+\prop_new:N \g_pdffile_embed_prop
+%    \end{macrocode}
+% \end{variable}
+% \begin{macro}{\pdffile_embed_show:}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdffile_embed_show:
+  {
+    \msg_show:nnx
+     {pdffile}{show-files}
+     {
+       \prop_map_function:NN {\g_pdffile_embed_prop} \msg_show_item:nn
+     }
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\pdffile_embed_file:nnn, \pdffile_embed_stream:nnn}
+% At first a command to set the mimetype. It either uses the current value
+% in the file dictionary, or tries to guess it from the extension.
+% \begin{macro}{\@@_mimetype_set:nN,\@@_mimetype_set:VN}
+% \begin{macro}{\@@_fstream_write:nN, \@@_fstream_write:VN}
+% \begin{macro}{\@@_stream_write:nN, \@@_stream_write:VN}
+%    \begin{macrocode}
+%#1 file name,
+%#2 tl to return the (printed) value for the guessed mimetype
+\cs_new_protected:Npn \@@_mimetype_set:nN #1 #2
+  {
+    \file_parse_full_name:nNNN
+          {#1}
+          \l_@@_tmpa_str %unused
+          \l_@@_tmpb_str %unused
+          \l_@@_ext_str
+        %check if Subtype has been set
+        \pdfdict_get:nnN { l_pdffile}{Subtype}\l_@@_tmpa_tl
+        %if not look up in the prop:
+        \quark_if_no_value:NT \l_@@_tmpa_tl
+          {
+            \prop_get:NVNTF
+              \g_pdffile_mimetypes_prop
+              \l_@@_ext_str
+              \l_@@_tmpb_tl
+              {
+                \tl_set:Nx #2 {/Subtype~\pdf_name_from_unicode_e:V \l_@@_tmpb_tl}
+              }
+              {
+                \msg_warning:nnx { pdffile }{ mimetype-missing} {#1}
+                \tl_clear:N #2
+              }
+          }
+    }
+
+\cs_generate_variant:Nn \@@_mimetype_set:nN {VN}
+
+%#1 file name,
+%#2 tl, should be empty or contain /Subtype /mimetype
+%   e.g. result from \@@_mimetype_set:NN
+\cs_new_protected:Npn \@@_fstream_write:nN #1 #2
+  {
+    \pdf_object_unnamed_write:nx { fstream }
+      {
+        {
+          #2
+          \pdfdict_use:n { l_pdffile}
+          \pdfdict_if_empty:nF { l_pdffile/Params}
+            {
+              /Params
+                <<
+                  \pdfdict_use:n { l_pdffile/Params}
+                >>
+            }
+        }
+        { #1 }
+      }
+     \tl_clear:N \l_@@_automimetype_tl
+   }
+
+\cs_generate_variant:Nn \@@_fstream_write:nN {VN}
+
+%#1 file content
+%#2 tl, should be empty or contain /Subtype /mimtype
+%   e.g. result from \@@_mimetype_set:NN
+\cs_new_protected:Npn \@@_stream_write:nN #1 #2
+  {
+    \pdf_object_unnamed_write:nx { stream }
+      {
+        {
+          #2
+          \pdfdict_use:n { l_pdffile}
+          \pdfdict_if_empty:nF { l_pdffile/streamParams}
+            {
+              /Params
+                <<
+                  \pdfdict_use:n { l_pdffile/streamParams}
+                >>
+            }
+        }
+        { \exp_not:n { #1 } }
+      }
+     \tl_clear:N \l_@@_automimetype_tl
+   }
+
+\cs_generate_variant:Nn \@@_stream_write:nN {VN}
+
+%#1 symbolic name of dict object
+%#2 target file name,
+%#3 object ref of the file stream.
+\cs_new_protected:Npn \@@_filespec_write:nnn #1 #2 #3
+  {
+    \tl_if_blank:nT { #2 }
+      {
+        \msg_error:nn {pdffile}{target-name-missing}
+      }
+      {
+        \pdf_object_new:nn   { #1 } {dict}
+        \group_begin:
+          \@@_filename_convert_to_print:nN  { #2 } \l_@@_tmpa_str
+          \pdfdict_put:nnx {l_pdffile/FileSpec}{F} { \l_@@_tmpa_str }
+          \pdfdict_put:nnx {l_pdffile/FileSpec}{UF}{ \l_@@_tmpa_str }
+          \pdf_object_write:nx { #1 }
+            {
+              \pdfdict_use:n { l_pdffile/FileSpec}
+              \tl_if_empty:nF { #3 }
+                {
+                  /EF <</F~#3 /UF~#3>>
+                }
+            }
+        \group_end:
+      }
+  }
+
+
+%#1 {source filename}
+%#2 {target filename}
+%#3 { filespec object name } (will internally get a prefix!)
+\cs_new_protected:Npn \pdffile_embed_file:nnn #1 #2 #3
+  { %               if #1 empty => only filespec
+    %               if #2 empty => = #1
+    \pdf_object_if_exist:nTF { #3 }
+      {
+        \msg_error:nnn { pdffile }{ object-exists } { #3 }
+      }
+      {
+        \tl_if_blank:nTF { #1 }
+          {
+            \tl_set:Nn \l_@@_embed_ref_tl {}
+          }
+          {
+            \file_get_full_name:nNTF {#1} \l_pdffile_source_name_str
+              {
+                \@@_mimetype_set:VN
+                  \l_pdffile_source_name_str
+                  \l_@@_automimetype_tl
+                \@@_fstream_write:VN
+                  \l_pdffile_source_name_str
+                  \l_@@_automimetype_tl
+                \tl_set:Nx \l_@@_embed_ref_tl { \pdf_object_ref_last: }
+              }
+              {
+                \msg_error:nnn { pdffile }{ file-not-found }{ #1 }
+              }
+
+           }
+        \prop_gput:Nnx
+           \g_pdffile_embed_prop
+           { #3 }
+           {
+             { \tl_if_blank:nTF { #1 } {filespec}{file} }
+             {\l_pdffile_source_name_str}
+             {
+               \tl_if_blank:nTF { #2 }
+                 { \l_pdffile_source_name_str }
+                 { \tl_to_str:n{#2}}
+             }
+           }
+        \tl_if_blank:nTF { #2 }
+          {
+            \exp_args:Nnnx
+              \@@_filespec_write:nnn
+                %#1 dict, #2 target file name, #3 object ref
+                { #3 }
+                { #1 }
+                {\l_@@_embed_ref_tl}
+          }
+          {
+            \exp_args:Nnnx
+              \@@_filespec_write:nnn
+                %#1 dict, #2 target file name, #3 object ref
+                { #3 }
+                { #2 }
+                {\l_@@_embed_ref_tl}
+          }
+      }
+  }
+
+
+%#1{stream content}
+%#2{target filename}
+%#3{file object name }
+\cs_new_protected:Npn \pdffile_embed_stream:nnn #1 #2 #3
+  {
+    %               if #2 empty => error
+    \pdf_object_if_exist:nTF { #3 }
+      {
+         \msg_error:nnn { pdffile }{ object-exists } { #3 }
+      }
+      {
+         \prop_gput:Nnx
+            \g_pdffile_embed_prop
+            { #3 }
+            {{stream}{}{\tl_if_blank:nTF {#2}{stream.txt}{\exp_not:n{#2}}}}
+         \tl_if_blank:nTF {#2}
+          { \@@_mimetype_set:nN {stream.txt}\l_@@_automimetype_tl}
+          { \@@_mimetype_set:nN { #2 } \l_@@_automimetype_tl }
+         \@@_stream_write:nN
+           { #1 }
+           \l_@@_automimetype_tl
+         \tl_set:Nx \l_@@_embed_ref_tl { \pdf_object_ref_last: }
+         \exp_args:Nnxx
+           \@@_filespec_write:nnn
+             %#1 dict, #2 target file name, #3 object ref
+             { #3 }
+             { \tl_if_blank:nTF {#2}{stream.txt}{\exp_not:n{#2}} }
+             {\l_@@_embed_ref_tl}
+     }
+  }
+
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfmanagement.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfmanagement.dtx
new file mode 100644
index 00000000000..55514bd06c0
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfmanagement.dtx
@@ -0,0 +1,1468 @@
+% \iffalse meta-comment
+%
+%% File: l3pdfmanagement.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{tabularx}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=l3pdfmanagement (LaTeX PDF management testphase bundle)}
+
+\providecommand\potentialclash{\noindent\llap{\dbend\ }}
+
+% Fixing footnotes in  functions and variables: this should be in l3doc!
+\newcommand\fixfootnote[2]{\footnotemark
+  \AddToHookNext{env/#1/after}{\footnotetext{#2}}}
+\AddToHook{env/function/begin}{\def\footnote{\fixfootnote{function}}}
+\AddToHook{env/variable/begin}{\def\footnote{\fixfootnote{variable}}}
+
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \title{^^A
+%   The \pkg{l3pdfmanagement} module\\ Managing central PDF resources ^^A
+%   \\\LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a,released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{l3pdfmanagement} documentation}
+% When creating a pdf a number of objects, dictionaries and entries to
+% central \enquote{core} dictionaries must be created.
+%
+% The commands in this module offer interfaces to this core PDF dictionaries
+% They unify a number of primitives like the pdftex
+% registers and commands \cs{pdfcatalog}, \cs{pdfpageattr},
+% \cs{pdfpagesattr}, \cs{pdfinfo}, \cs{pdfpageresources}
+% and similar commands of the other backends in a backend independant way.
+%
+% The supported backends are pdflatex, lualatex, (x)dvipdfmx (latex, xelatex
+% and---starting in texlive 2021--lualatex)
+% and dvips with ps2pdf (not completely yet). dvips with distiller could work too
+% but is untested.
+%
+% That the interfaces are backend independent doesn't mean that the results and even
+% the compilation behavior is identical. The backends are too different to allow
+% this. Some backends expand arguments e.g. in a \cs{special} while other don't.
+% Some backends can insert a resource at the first compilation, while another uses
+% the aux-file and a label and so needs at least two. Some backends create and
+% manage resources automatically which must be managed manually by other backends.
+%
+% The dictionaries and resources handled by this module are inserted only
+% once in a PDF or only once per page. Examples are the Catalog dictionary,
+% the Info dictionary, the page resources. For these dictionaries and resources
+% management by the \LaTeX{} kernel is necessary to avoid
+% that packages overwrite settings from
+% other packages which would lead to clashes and incompatibilities.
+% It is therefore necessary that \emph{all} packages which want to add content to these
+% dictionaries and resources use the interface provided by this module.
+%
+% As these dictionaries and resources are so central for the PDF format values to these
+% dictionaries are always added globally. Through the interface values
+% can be added (and in many cases also removed) by users and packages,
+% but the actually writing of the
+% dictionary entries and resources to the PDF is handled by
+% the kernel code.
+%
+% The interface uses as main name to address the resources \emph{Paths}
+% which follow the names and structure described in the PDF reference. This
+% should make it easy to identify the names needed to insert a specific
+% PDF resources with the new interfaces.
+% All \emph{Paths} have names starting with an uppercase letter.
+%
+% The following tabular summarize the \emph{Paths} and which pdftex primitive they
+% replace:
+%
+% \begin{tabular}{ll}
+%  Info                                  & \cs{pdfinfo}           \\
+%  Catalog \&  various subdictionaries   & \cs{pdfcatalog}        \\
+%  Pages                                 & \cs{pdfpagesattr}      \\
+%  Page, ThisPage                        & \cs{pdfpageattr}       \\
+%  Page/Resources/ExtGState              & \cs{pdfpageresources}  \\
+%  Page/Resources/Shading                & \cs{pdfpageresources}  \\
+%  Page/Resources/Pattern                & \cs{pdfpageresources}  \\
+%  Page/Resources/ColorSpace             & \cs{pdfpageresources}  \\%
+%  \end{tabular}
+%
+%  There is no \texttt{Page/Resources/Properties} dictionary in the list,
+%  because this dictionary is not filled directly, but
+%  managed through side effects when setting BDC-marks.
+%
+%  \subsection{User Commands}
+%  To avoid problems with older documents the resource management of this
+%  module is not activated unconditionally. The values are pushed out to the
+%  dictionaries only if a boolean has been set to true. The state can be tested
+%  with a conditional.
+%  \begin{function}[EXP,pTF,added=2020-07-04]
+%   {\pdfmanagement_if_active:}
+%   This conditional tests if the resource management code is active.
+%  \end{function}
+%
+% \begin{function}[added = 2020-04-06]
+%   {\pdfmanagement_add:nnn,\pdfmanagement_add:nnx,\pdfmanagement_add:nxx}
+%   \begin{syntax}
+%     \cs{pdfmanagement_add:nnn} \Arg{resource path} \Arg{name} \Arg{value}
+%   \end{syntax}
+% This function puts \Arg{name} \Arg{value} in the PDF resource described by
+% the symbolic name \Arg{resource path}. Technically it stores it globally in an internal
+% property lists and writes it later into the right PDF dictionary\footnote{Currently all
+% resources are PDF dictionaries, so resource and dictionary mean the same.}
+% Which values for \Arg{resource path} exist is described in the following.
+% \Arg{name} should be a PDF Name without the starting slash. Like with all
+% keys used in PDF dictionaries (see the l3pdfdict module) the name is escaped
+% with \cs{str_convert_pdfname:n} when stored.
+% \Arg{value} should be a valid PDF value for this Name in the
+% target dictionary.
+%
+%
+% The code works with all major engines but not necessarily
+% in the same way. Most importantly
+% \begin{itemize}
+% \item The expansion behaviour of the backends can differ. Some backends expand a
+% value always fully when writing to the PDF, with other backends command names
+% could end as strings in the PDF. So one should neither rely on \Arg{name}
+% \Arg{value} to be expanded nor not expanded by the backend commands.
+% \item The number of compilations needed can differ between the engines and
+% backends. Some engines have to use labels and the aux-file to setup
+% the dictionaries and so need at least two compilations to put everything
+% in place.
+% \end{itemize}
+% \end{function}
+%
+% \begin{function}[added = 2020-04-08]
+%   {\pdfmanagement_show:n }
+%   \begin{syntax}
+%     \cs{pdfmanagement_show:n}  \Arg{resource path}
+%   \end{syntax}
+%   This shows the content of the dictionary targetted by
+%   \Arg{resource path} in the log and on the terminal if possible.
+%
+%   It is not reliable for page resources as these are filled at shipout.
+%
+%   It also doesn't show necessarly all the content.
+%   For example most backends add automatically
+%   entries to the Info dictionary.
+% \end{function}
+%
+% \begin{function}[added = 2020-04-07]
+%   {
+%     \pdfmanagement_remove:nn,
+%   }
+%   \begin{syntax}
+%     \cs{pdfmanagement_remove:nn} \Arg{resource path} \Arg{name}
+%   \end{syntax}
+%   Removes  |/|\meta{name} and its associated \meta{value} from the
+%   dictionary described with \Arg{resource path}
+%   The removal is global.
+%   If \meta{name} is not found no change occurs,
+%   \emph{i.e}~there is no need to test for the existence of a name before
+%   trying to remove it.
+%   Values from the special Catalog entries where the values are collected in arrays
+%   can't be removed (but should ever a use case appear it could be added).
+% \end{function}
+%
+% \subsection{Description of the resource pathes}
+% \subsubsection{Info: The Info dictionary}
+% \begin{NOTE}{UF}
+% path: Info
+% The info dictionary is filled by e.g. \cs{pdfinfo}. Multiple appearances of
+% \cs{pdfinfo} are concatenated, so one could end with multiple /Title or /Author entries.
+% It is then viewer dependent which one is showed, so it is better to avoid this.
+% We therefore setup a property which is filled and written to the info
+% directory in one go. According to hyperref a few odd drivers (hvtex, dvipsone, dviwind)
+% don't support arbitrary keys, but this should be handle elsewhere.
+% As entries with empty content
+% should be omitted we add a test. The string command should perhaps escape the argument,
+% but for now we are assuming that the argument is pdf safe.
+% hyperref writes to the info dictionary at the shipout of the first page --
+% probably to catch the  case that \cs{title} is issued after the begin of the document.
+% We are outputting at the last page -- this needs a second compilation but
+% this is needed anyway.
+% \end{NOTE}
+% \potentialclash If the primitive commands of the engines are used too there will
+% be double entries in the pdf (at least with the backend pdftex and luatex).
+% How pdf viewer handles this is unpredictable.
+%
+%  \begin{function}
+%   {
+%     pdfmanagement: Info
+%   }
+%   \begin{syntax}
+%     \cs{pdfmanagement_add:nnn} \{Info\} \Arg{name} \Arg{value}
+%   \end{syntax}
+%   Adds |/|\meta{name} and the \meta{value} to the Info dictionary.
+%   \meta{name} should be a PDF name without the leading slash,
+%   Like with all
+%   keys used in PDF dictionaries (see the l3pdfdict module) the name is escaped
+%   with \cs{str_convert_pdfname:n} when stored.
+%   \meta{value} should be a valid pdf value. Any escaping or (re)encoding must be
+%   done explicitly.
+%   If a \meta{name} is used twice, only the last \meta{value}
+%   set will be used. The Info dictionary is written at the end of the compilation,
+%   so values can be set at any time.
+%   The Info dictionary expects utf16be in the strings, so a conversion like this is
+%   normally sensible:
+%   \begin{verbatim}
+%    \str_set_convert:Nnnn \l_tmpa_str { Grüße }{ default } {utf16/string}
+%    \pdfmanagement_add:nnx {Info} {Title}{(\l_tmpa_str)}
+%   \end{verbatim}
+% \end{function}
+%
+%  The entries in Info dictionary are rather special as the engines/backends adds some
+%  core entries, and changing or removing these entries is not always possible.
+%
+%  The special entries are
+%  \begin{description}
+%  \item[Producer] Added by all engines and backends. Removing the entry is only possible
+%  with luatex with |\pdfvariable suppressoptionalinfo 128|. Changing is possible
+%  with \cs{pdfmanagement_add:nnn} with the exception of dvips/pstopdf where the entry is
+%  always something like |GPL Ghostscript 9.53.3|.
+%  \item[Creator] Added by all engines and backends. Removal only possible in luatex by adding
+%  16 to the bitset. Changing is possible with the management command.
+%  \item[CreationDate] Added by all engines and backends. With the exception of |dvips/ps2pdf|
+%  |SOURCE_DATE_EPOCH| is honored. With pdftex it is possible to suppress it with
+%  |\pdfinfoomitdate = 1|, and in luatex by adding 32 to the bitset.
+%  Changing is possible with the management command and will overwrite an epoch setting.
+%  \item[ModDate] Added by all engines and backends with the exception of xdvipdfmx.
+%  With the exception of |dvips/ps2pdf| |SOURCE_DATE_EPOCH| is honored.
+%   Suppressing it is possible in pdftex with
+%  |\pdfinfoomitdate = 1|, and in luatex by adding 64 to the bitset. Changing is possible with
+%  the management command.
+%  \item[Trapped] Added by pdftex and luatex. Removal only possible in
+%  luatex by adding 256 to the bitset. Changing (and adding in the other backends) is
+%  possible with the management command.
+%  \item[PTEX.Fullbanner] Added by pdftex and luatex. Removal possible in pdftex with
+%  |\pdfsuppressptexinfo-1|, in luatex by adding 512 to the bitset.
+%  Changing is not possible.
+%  \item[Title] Added by dvips/ps2pdf and set to |filename.dvi|. Removal is probably
+%  not possible, but it can be overwritten with the management command.%
+%  \end{description}
+% \subsubsection{Pages: The \enquote{Pages} dictionary}
+% \potentialclash As the content of this dictionary is written at the end it will
+% in pdftex and luatex overwrite values added with the primitive commands (e.g.
+% \cs{pdfpagesattr}.
+% Package authors should use the management commands instead.
+
+% By using this path with the pdfmanagement interface,
+% values can be added to the /Pages object.
+% This replaces for example \cs{pdfpagesattr}.
+%
+% \begin{function}{pdfmanagement: Pages}
+%   \begin{syntax}
+%     \cs{pdfmanagement_add:nnn} \{Pages\} \Arg{name} \Arg{value}
+%   \end{syntax}
+%
+%   Adds |/|\meta{name} \meta{value} to the |/Pages| dictionary.
+%   It is always stored globally. The content is written to the pdf
+%   at the end of the compilation, so values can be added, changed or
+%   removed until then.
+%   \meta{name} should be a valid pdf name without the leading slash,
+%   \meta{value} should be a valid pdf value. Any escaping or (re)encoding must
+%   be done explicitly. Some backends expand the value but this should not be
+%   relied on. If a \meta{name} is used twice, only the last \meta{value}
+%   set will be used.
+%
+% \end{function}
+%
+% \subsubsection{\enquote{Page} and \enquote{ThisPage}}
+% \begin{NOTE}{UF}
+% Open is the question if one need a command to set attribute on a page by page number.
+% Open is the setter for /AF (and perhaps /OutputIntents).
+% See also https://tex.stackexchange.com/questions/479812/extension-of-rotating-package-to-set-pdf-rotation
+% (should work now)
+% \end{NOTE}
+% \begin{function}[added = 2020-04-12]
+%   {pdfmanagement: Page}
+%   \begin{syntax}
+%     \cs{pdfmanagement_add:nnn} \{Page\} \Arg{name} \Arg{value}
+%   \end{syntax}
+%   Values added with the path \texttt{Page} are added to the page dictionary
+%   of the current page and the following pages. The current page means the page
+%   on which the command is \emph{executed}. \meta{name} should be a valid pdf name
+%   without the leading slash. Typical names used here are e.g.
+%   \texttt{Rotate} and \texttt{CropBox}.
+%   \meta{value} should be a valid pdf value.
+%   Any escaping or (re)encoding must be done explicitly. Some backends expand the
+%   value but this should not be relied on.
+%   To avoid problems with the asynchronous page breaking
+%   the command should be used after \cs{newpage} or in the header.
+%   It should not be used in a float, as it will then quite probably be executed
+%   on the wrong page.
+%   The value is assigned directly and is always stored globally.
+%   If a \meta{name} is used twice, only the last \meta{value}
+%   set will be used. Names set with \cs{pdfmanagement_add:nnn}|{ThisPage}| will overwrite
+%   names set with \cs{pdfmanagement_add:nnn}|{Page}| if there is a clash.
+%   Values can be removed again with \cs{pdfmanagement_remove:nn}.
+%   This replaces \cs{pdfpageattr}.
+% \end{function}
+% \begin{function}[added = 2020-04-12]
+%   { pdfmanagement: ThisPage}
+%   \begin{syntax}
+%     \cs{pdfmanagement_add:nnn} \{ThisPage\} \Arg{name} \Arg{value}
+%   \end{syntax}
+%   Adds |/|\meta{name} \meta{value} at \emph{shipout} to the page dictionary of the
+%   current page. Current page means here the \emph{shipout} page.
+%   It is always stored globally.
+%   If \Arg{name} has already a value set in the \texttt{Page}
+%   dictionary it will be overwritten for this page.
+%   \meta{name} should be a valid pdf name without the leading slash,
+%   \meta{value} should be a valid pdf value. Any escaping or (re)encoding must be
+%   done explicitly. If a \meta{name} is used twice, only the last \meta{value}
+%   set will be used.
+%   With the engine pdflatex (at least) a second compilation is needed.
+%   Values added to \texttt{ThisPage} can not be removed. It is not possible to
+%   show the content of this dictionary with \cs{pdfmanagement_show:n}.
+% \end{function}
+% \subsubsection{\enquote{Page/Resources}: ExtGState, ColorSpace, Shading, Pattern}
+% \begin{NOTE}{UF}
+% Only for pdf/luatex and xdvipdfmx backend- and pdf-code is needed to add values
+% to these resources.
+% With dvips the resources are added through high-level code (e.g. transparency), so the
+% backend/pdf commands are no-ops.
+% For every resources there is only one object. References to these objects are added to
+% all pages starting from the page where the first time something has been added to the
+% resource and to all XObjects. For luatex and pdftex it must be done together
+% with the /Properties, see above.
+% I don't see a need to set e.g. /ColorSpace page wise: preflight handles this
+% fine, see experiment colorspace-resources.
+% As pgf does the same, there is a need to patch it for now. Ditto for package colorspace.
+% \end{NOTE}
+% \begin{function}[updated = 2020-04-10]
+%   {
+%    pdfmanagement: Page/Resources/ExtGState,
+%    pdfmanagement: Page/Resources/ColorSpace,
+%    pdfmanagement: Page/Resources/Shading,
+%    pdfmanagement: Page/Resources/Pattern,
+%   }
+%   \begin{syntax}
+%     \cs{pdfmanagement_add:nnn} \{Page/Resources/\meta{resource}\} \Arg{name} \Arg{value}
+%   \end{syntax}
+%   Adds |/|\meta{name} \meta{value} to the page resource \meta{resource}.
+%   \meta{resource} can be |ExtGState|, |ColorSpace|, |Pattern| oder |Shading|.
+%   The values are always stored globally. The content is written to the pdf
+%   at the end of the compilation, so values can be added until then.
+%   \meta{name} should be a valid pdf name without the leading slash,
+%   \meta{value} should be a valid pdf value for the resource.
+%   Any escaping or (re)encoding must be done explicitly. If a \meta{name} is
+%   used twice, only the last \meta{value} set will be used.
+%
+%   With the dvips backend the command does nothing: these resources are managed by
+%   ghostscript or the distiller if e.\,g. transparency is used.
+%
+%   The resources are added to all pages starting with the first where something has
+%   been added to a resources. That means that for example
+%   all ExtGState resources are combined in one
+%   dictionary object and every page with a ExtGState resource refer to this object%
+%   \footnote{This is similar to how pgf handles this resources}.
+%
+%   \potentialclash The primitive commands (e.g. \cs{pdfpageresources})
+%   to set the resources should not be used
+%   together with this code as the calls will overwrite each other and values
+%   will be lost. This means that currently there are clashes with the packages tikz,
+%   transparent and colorspace.
+% \end{function}
+% \subsubsection{\enquote{Catalog} \& subdirectories}
+% \begin{NOTE}{UF}
+% Perhaps some tools to create the AF-file specification dictionaries is useful.
+% Open for now:
+% /Extensions               (dict, pdf 2.0)
+% /Dests ? difference to subdict in Names?
+% /DSS                      (dict, pdf 2.0)
+% /Acroform/DR/ExtGState etc probably unneeded.
+% \end{NOTE}
+% The catalog is a central dictionary in a PDF with a number of subdictionaries.
+% Entries to the top level of the catalog can be added with\\
+% |\pdfmanagement_add:nnn {Catalog}|\Arg{Name}\Arg{Value}.
+% Entries to subdictionaries by using in the first
+% argument one of the pathes described later.
+% The entries in the catalog have varying requirements regarding the
+% PDF management. Some entries (like \texttt{/Lang}) are simple values
+% where new values should
+% overwrite existing values, other like for example \texttt{/OutputIntents}
+% can contain a number of values and can be filled from more than one source.
+% In some cases the values that needs to be added are not at the top-level
+% but in some subsubdictionary or are actually part of an array.
+% To handle the pdf management uses a variety of internal, special handlers.
+%
+% \potentialclash In some cases entries are added implicitly.
+% For example entries to the name
+% tree of the \texttt{/EmbeddedFiles} key in the \texttt{/Names} directory are
+% added with the commands of the \texttt{l3pdffile} module. This clashes with
+% e.g. the embedfile package which should not be used!
+%
+%
+%   \paragraph{Entries at the top level of the catalog}
+%   The Names in the following tabular are entries that are added to the
+%   top level of the catalog.
+%
+%   If \meta{Name} gets assigned a value more than once the last one wins.
+%   There is no check that the values have the correct type and format.
+%   It is up to the user to ensure that the value does what is intended.
+%
+%   The required PDF version is only mentioned if it is larger than 1.5.
+%
+%   Example: |\pdfmanagement_add:nnn {Catalog}{PageMode}{/UseNone}|
+%
+%   \medskip
+%   \noindent
+%   \begin{tabularx}{\linewidth}{ll>{\raggedright\arraybackslash}X}
+%    \bfseries Name          &  \bfseries Value  & \bfseries Remark \\\midrule
+%    Collection              &  objref or dict     & the content should be
+%     build by external packages (see eg embedfile)                   \\
+%    DPartRoot               &  objref or dict     & PDF 2.0           \\
+%    Lang                    &  string             & e.g. \texttt{(de-DE)} \\
+%    Legal                   &  objref or dict                             \\
+%    Metadata                &  objref or stream                       \\
+%    NeedsRendering          &  boolean            & PDF 1.7\\
+%    OpenAction              &  array (dest) or dict (action) \\
+%    PageLabels              &  objref or dict     &  number tree \\
+%    PageLayout              &  name               & one of /SinglePage, /OneColumn,
+%                                        /TwoColumnLeft, /TwoColumnRight,
+%                                        /TwoPageLeft,
+%                                        /TwoPageRight \\
+%    PageMode                &  name               & one of /UseNone, /UseOutlines, /UseThumbs,
+%                                    /UseOC, /UseAttachments (PDF 1.6)\\
+%    Perms                   &  objref or dict     & permissions\\
+%    PieceInfo               &  objref or dict \\
+%    SpiderInfo              &  objref or dict \\
+%    StructTreeRoot          &  objref or dict \\
+%    Threads                 &  objref to an array\\
+%    URI                     &  objref or dict \\
+%    Version                 &  name           & eg. \texttt{/1.7} \\
+%    \meta{unknown}          &                 & an unknown \meta{name} will be
+%                                                inserted without a warning.\\
+%   \end{tabularx}
+%   \par\medskip
+%
+%   \paragraph{Simple entries in subdictionaries of the catalog}
+%   The following resource pathes have been predeclared and allow to
+%   add values to the respective subdictionaries of the catalog. The
+%   names of the dictionaries follow the naming and location of the dictionaries
+%   in the PDF reference.
+%   If \meta{Name} gets assigned two values the last one wins.
+%
+%   Example: |\pdfmanagement_add:nnn {Catalog/MarkInfo}{Marked}{true}|
+%
+%   \medskip
+%   \noindent
+%   \begin{tabularx}{\linewidth}{lll>{\raggedright\arraybackslash}X}
+%    \bfseries Path/dictionary    & \bfseries Names & \bfseries Value  & \bfseries Remark
+%    \\\midrule
+%    Catalog/AA              &WC, WS, DS, WP,DP& all dict    \\
+%    Catalog/AcroForm        &  NeedAppearances&  boolean & In pdf 2.0
+%                                                           NeedAppearances
+%                                                           is deprecated,
+%                                                           it is then required
+%                                                           that every widget has
+%                                                           an appearance streams.\\
+%                            &  SigFlags       & Integer\\
+%                            &  DA             & String \\
+%                            &  Q              & Integer\\
+%                            &  XFA            & stream or array & pdf 1.5\\
+%  Catalog/AcroForm/DR       & \meta{name}     &            & probably unneeded \\
+%  Catalog/AcroForm/DR/Font  & \meta{name}     & dict       & \\
+%  Catalog/MarkInfo          & Marked          & boolean      \\
+%                            & UserProperties  & boolean      \\
+%                            & Suspects        & boolean      \\
+%  Catalog/ViewerPreferences & HideToolbar     & boolean      \\
+%                            & Direction       & /R2L or /L2R \\
+%                            & \ldots          &              & many more, see the reference \\
+% \end{tabularx}
+%
+%
+% \paragraph{Catalog entries with multiple values in arrays}
+% The following entries are special: Their values are arrays and
+% it must be possible to append to such arrays. This means that a new
+% call to set this value doesn't replace the value but appends it.
+% The value is an object reference. It is sensible to declare the object
+% first. E.g.
+%  \begin{verbatim}
+%  \pdf_object_new:nn   {pkg@intent}{dict}
+%  \pdf_object_write:nn {pkg@intent}{...}
+%  \pdfmanagement_add:nnx  {Catalog} {OutputIntents}{\pdf_object_ref:n {pkg@intent}}
+%  \end{verbatim}
+%
+%  or
+%  \begin{verbatim}
+%  \pdf_object_unnamed_write:nn   {dict} { ... }
+%  \pdfmanagement_add:nnx  {Catalog} {OutputIntents}{\pdf_object_ref_last:}
+%  \end{verbatim}
+%
+%
+%   \medskip
+%   \noindent
+%   \begin{tabularx}{\linewidth}{lll>{\raggedright\arraybackslash}X}
+%    \bfseries Path/dictionary &\bfseries Name        & \bfseries Value   & \bfseries Remark \\\midrule
+%    Catalog/AcroForm     & Fields               & object reference\\
+%    Catalog/AcroForm     & CO                   & object reference\\
+%    Catalog              & AF                   & object reference & PDF 2.0, associated files\\
+%    Catalog/OCProperties & OCGs                 & object reference  &if there are OCProperties, OCGs and D are required.\\
+%    Catalog/OCProperties & Configs              & object reference \\
+%    Catalog/OCProperties & D                    & object reference & This is actually a single value as
+%                                         there can be only one default.
+%                                         If the value is set twice, the
+%                                         second wins, and the first is
+%                                         added to OCProperties/Configs.\\
+%    Catalog              & OutputIntents        & object reference\\
+%    Catalog              & Requirements         & object reference & PDF 1.7 \\
+%    Catalog/Names        & EmbeddedFiles        & object reference & This should reference a filespec dictionary. It will
+%                                                  attach the file to the file panel.
+%   \end{tabularx}
+%
+% \end{documentation}
+%
+% \begin{implementation}
+%  \section{\pkg{l3pdfmanagement} implementation}
+%    \begin{macrocode}
+%<@@=pdfmanagement>
+%<*header>
+%
+\ProvidesExplPackage {l3pdfmanagement} {2021-02-22} {0.95a}
+  {Management of core PDF dictionaries (LaTeX PDF management testphase bundle)}
+%</header>
+%    \end{macrocode}
+% \subsection{Messages}
+%    \begin{macrocode}
+%<*package>
+\msg_new:nnn  { pdfmanagement } { unknown-dict }
+              { The~PDF~management~resource~'#1'~is~unknown. }
+
+\msg_new:nnn  { pdfmanagement } { empty-value }
+              { The~value~for~#1~is~empty~and~will~be~ignored }
+
+\msg_new:nnn  { pdfmanagement } { no-removal }
+              { It~is~not~possible~to~remove~values~from~'#1'.}
+
+\msg_new:nnn  { pdfmanagement } { no-show }
+              { It~is~not~possible~to~show~the~content~of~'#1'.}
+
+\msg_new:nnn  { pdfmanagement } { show-dict }
+  {
+    The~PDF~resource~'#1'~
+    \tl_if_empty:nTF {#2}
+      { is~empty \\>~ . }
+      { contains~the~pairs~(without~outer~braces): #2 . }
+  }
+\msg_new:nnn  { pdfmanagement } { dict-already-defined  }
+  {
+    The~path~'#1'~is~already~defined.
+  }
+\msg_new:nnn  { pdfmanagement } { inactive  }
+  {
+    The~PDF~resources~management~is~not~active\\
+    command~'#1'~ignored.
+  }
+%    \end{macrocode}
+% \begin{variable}{\g_@@_active_bool}
+% This boolean will control the activation of the management code.
+% It is used in the hooks, and in some backend files.
+% % \cs{DeclareDocumentMetadata} should set it to true
+%    \begin{macrocode}
+\bool_new:N \g_@@_active_bool
+%    \end{macrocode}
+% \end{variable}
+% A user predicate to test if the management code is active
+%    \begin{macrocode}
+\prg_new_conditional:Npnn \@@_if_active:  { p , T , F , TF }
+  {
+    \bool_if:NTF \g_@@_active_bool
+      { \prg_return_true:  }
+      { \prg_return_false: }
+  }
+\prg_set_eq_conditional:NNn
+  \pdfmanagement_if_active: \@@_if_active: { p , T , F , TF }
+
+%    \end{macrocode}
+% We use a hook, to collect value added before the backend is ready.
+%    \begin{macrocode}
+\hook_new:n {pdfmanagement/add}
+\cs_new_protected:Npn \pdfmanagement_add:nnn #1 #2 #3
+  {
+    \@@_if_active:TF
+      {
+        \pdfdict_if_exist:nTF { g__pdf_Core/#1 }
+          {
+            \hook_gput_code:nnn
+              {pdfmanagement/add}
+              {pdfmanagement}
+              {
+                \@@_handler_gput:nnn { #1 }{ #2 }{ #3 }
+              }
+          }
+          {
+            \msg_error:nnn{pdfmanagement}{unknown-dict}{#1}
+          }
+      }
+      {
+        \msg_warning:nnx {pdfmanagement}{inactive}
+          {\tl_to_str:n {\pdfmanagement_add:nnn}}
+      }
+  }
+
+\cs_generate_variant:Nn \pdfmanagement_add:nnn {nnx,nxx}
+%    \end{macrocode}
+% \subsection{Hooks -- shipout and end of run code}
+% Code is executed in three places: At shipout of every page,
+% at shipout of the last page, at the end of the document
+% (after the last clearpage). Due to backend differences the code in the
+% three places (and the exact timing) can be different: pdflatex/lualatex
+% can execute code after the last \cs{clearpage} which the dvi-based
+% drivers have to add on a shipout page.
+%
+% \begin{variable}
+%   {
+%      \g__kernel_pdfmanagement_thispage_shipout_code_tl
+%      \g__kernel_pdfmanagement_lastpage_shipout_code_tl
+%      \g__kernel_pdfmanagement_end_run_code_tl
+%   }
+% This variables contain the code run in the three places.
+%    \begin{macrocode}
+\tl_new:N \g__kernel_pdfmanagement_thispage_shipout_code_tl
+\tl_new:N \g__kernel_pdfmanagement_lastpage_shipout_code_tl
+\tl_new:N \g__kernel_pdfmanagement_end_run_code_tl
+%    \end{macrocode}
+% \end{variable}
+%    \begin{macrocode}
+\tl_gset:Nn \g__kernel_pdfmanagement_thispage_shipout_code_tl
+  {
+     \bool_if:NT \g_@@_active_bool
+       {
+         \exp_args:NV \__pdf_backend_ThisPage_gpush:n      { \g_shipout_readonly_int }
+         \exp_args:NV \__pdf_backend_PageResources_gpush:n { \g_shipout_readonly_int }
+       }
+  }
+
+\tl_gset:Nn \g__kernel_pdfmanagement_lastpage_shipout_code_tl
+  {
+    \bool_if:NT \g_@@_active_bool
+       {
+         \__pdf_backend_PageResources_obj_gpush:          %ExtGState etc
+       }
+  }
+
+\tl_gset:Nn \g__kernel_pdfmanagement_end_run_code_tl
+  {
+    \bool_if:NT \g_@@_active_bool
+       {
+         \@@_Pages_gpush:            %pagesattr
+         \@@_Info_gpush:             %pdfinfo
+         \@@_Catalog_gpush:
+       }
+  }
+%    \end{macrocode}
+% \subsection{Naming convention}
+
+%  Currently the following names are used: ^^A!!!!! check, compare with g_@@_gnames_seq
+%  All have internally additionally a \texttt{Core} before the slash, to
+%  hide the real name a bit.
+%  \begin{verbatim}
+%  /Info                      %    (\pdfinfo)
+%  /Catalog                   %    (\pdfcatalog)
+%  /Catalog/AA                %
+%  /Catalog/AcroForm
+%  /Catalog/OCProperties
+%  /Catalog/OutputIntents
+%  /Catalog/AcroForm/DR
+%  /Catalog/AcroForm/DR/Font
+%  /Catalog/MarkInfo
+%  /Catalog/ViewerPreferences
+%  /Pages                     %    (\pagesattr)
+%  /Page                      %    (\pageattr)
+%  /ThisPage                  %    (\pageattr)
+%  /backend_PageN/Resources/Properties % this is only internal.
+%  /Page/Resources/ExtGState
+%  /Page/Resources/ColorSpace
+%  /Page/Resources/Pattern
+%  /Page/Resources/Shading
+%  /Page/Resources/Properties
+%  /Xform/Resources/Properties
+%  \end{verbatim}
+
+%  \begin{macro}{
+%                \@@_handler_gput:nnn,
+%                \@@_get:nnN,
+%                \@@_gremove:nn,
+%                \@@_show:n
+%                }
+%  \cs{@@_handler_gput:nnn} is the main command to fill the dictionaries.
+%  In simple cases it directly fill the property list, but if a handler exists
+%  this is called. It is important to use it only in places where this make sense.
+%
+%    \begin{macrocode}
+
+%global
+\cs_new_protected:Npn \@@_handler_gput:nnn #1 #2 #3  %#1 dict, #2 name, #3 value
+  {
+    \tl_if_empty:nTF { #3 }
+      {
+        \msg_none:nnn { pdfmanagement }{ empty-value }{ /#1/#2 }
+      }
+      {
+        \pdfdict_if_exist:nTF { g__pdf_Core/#1 }
+          {
+            \cs_if_exist:cTF
+              { @@_handler/#1/?_gput:nn } %general, name independant handler
+              { \use:c {@@_handler/#1/?_gput:nn} {#2} {#3} }
+              {
+                \cs_if_exist:cTF
+                  { @@_handler/#1/#2_gput:n }
+                  { \use:c {@@_handler/#1/#2_gput:n} {#3} } %special handler
+                  {
+                    \exp_args:Nnx
+                    \prop_gput:cnn
+                      { \__kernel_pdfdict_name:n { g__pdf_Core/#1 } }
+                      { \str_convert_pdfname:n { #2 } }
+                      { #3 }
+                  }
+              }
+          }
+          {
+            \msg_error:nnn { pdfmanagement } { unknown-dict } { #1 }
+          }
+      }
+  }
+
+
+\cs_generate_variant:Nn \@@_handler_gput:nnn {nxx}
+
+\cs_new_protected:Npn \@@_get:nnN  #1 #2 #3 %path,key,macro
+  {
+    \exp_args:Nnx
+    \prop_get:cnN
+      { \__kernel_pdfdict_name:n { g__pdf_Core/#1 } }
+      { \str_convert_pdfname:n {#2} } #3
+  }
+
+
+\cs_new_protected:Npn \@@_handler_gremove:nn #1 #2 %path,key
+  {
+    \pdfdict_if_exist:nTF { g__pdf_Core/#1 }
+          {
+            \cs_if_exist:cTF
+              { @@_handler/#1/?_gremove:n } %general, name independant handler
+              { \use:c {@@_handler/#1/?_gremove:n} {#2} }
+              {
+                \cs_if_exist:cTF
+                  { @@_handler/#1/#2_gremove: }
+                  { \use:c {@@_handler/#1/#2_gremove:} } %special handler
+                  {
+                    \exp_args:Nnx
+                    \prop_gremove:cn
+                      { \__kernel_pdfdict_name:n { g__pdf_Core/#1 } }
+                      { \str_convert_pdfname:n {#2} }
+                  }
+              }
+          }
+          {
+            \msg_error:nnn { pdfmanagement } { unknown-dict } { #1 }
+          }
+  }
+
+\cs_new_protected:Npn \@@_gremove:nn #1 #2 %path,key
+  {
+    \pdfdict_if_exist:nTF { g__pdf_Core/#1 }
+          {
+            \exp_args:Nnx
+            \prop_gremove:cn
+              { \__kernel_pdfdict_name:n { g__pdf_Core/#1 } }
+              { \str_convert_pdfname:n{#2} }
+          }
+          {
+            \msg_error:nnn { pdfmanagement } { unknown-dict } { #1 }
+          }
+  }
+
+
+\cs_new_protected:Npn \@@_show:Nn #1#2
+  {
+    \cs_if_exist:cTF
+      { @@_handler/#2/?_show: } %general, name independant handler
+      { \use:c {@@_handler/#2/?_show:} }
+      {
+        \prop_if_exist:cTF { \__kernel_pdfdict_name:n { g__pdf_Core/#2 } }
+          {
+             #1
+               { pdfmanagement } { show-dict }
+               { \tl_to_str:n {#2} }
+               {
+                 \prop_map_function:cN
+                  {\__kernel_pdfdict_name:n { g__pdf_Core/#2 }}
+                  \msg_show_item:nn
+               }
+               { } { }
+          }
+          {
+            #1 { pdfmanagement } { unknown-dict } {#2}{}{}{}
+          }
+       }
+  }
+
+\cs_new_protected:Npn \@@_show:n #1  %path
+  {
+    \prop_show:c { \__kernel_pdfdict_name:n { g__pdf_Core/#1 } }
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+%
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfmanagement_show:n #1
+  {
+    \@@_show:Nn \msg_show:nnxxxx {#1}
+  }
+%    \end{macrocode}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfmanagement_remove:nn #1 #2
+  {
+    \pdfdict_if_exist:nTF { g__pdf_Core/#1 }
+      {
+        \@@_handler_gremove:nn { #1 }{ #2 }
+      }
+      {
+        \msg_error:nnn{pdfmanagement}{unknown-dict}{#1}
+      }
+  }
+%    \end{macrocode}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfmanagement_get:nnN #1 #2 #3
+  {
+    \pdfdict_if_exist:nTF { g__pdf_Core/#1 }
+      {
+        \@@_get:nnN { #1 }{ #2 } #3
+      }
+      {
+        \msg_error:nnn{pdfmanagement}{unknown-dict}{#1}
+      }
+  }
+%    \end{macrocode}
+% \subsection{The Info dictionary}
+% Initialization of the dictionary:
+%    \begin{macrocode}
+\pdfdict_new:n { g__pdf_Core/Info}
+%    \end{macrocode}
+%
+% \begin{macro}{\@@_Info_gpush:}
+% \cs{@@_Info_gpush:} is the command that outputs the info dictionary (currently
+% in the end-of-run hooks).
+%    \begin{macrocode}
+% push to the register command / issue the special
+\cs_new_protected:Npn \@@_Info_gpush:
+  {
+    \prop_map_function:cN
+      { \__kernel_pdfdict_name:n { g__pdf_Core/Info} }
+      \__pdf_backend_info_gput:nn
+    \prop_gclear:c { \__kernel_pdfdict_name:n { g__pdf_Core/Info} }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \subsection{The Pages dictionary code}
+% \begin{NOTE}{UF}
+% The register is normally used only a few times in a document, so it would be
+% okay to update the register/add the special at every change,
+% but with dvips/dvipdfmx this would disable removing entries.
+% So we issue the push code only at the end of the document.
+% \end{NOTE}
+% At first the initialisation
+%     \begin{macrocode}
+\pdfdict_new:n { g__pdf_Core/Pages}
+%    \end{macrocode}
+%
+% \begin{macro}{\@@_Pages_gpush:}
+% This is the command that outputs the Pages dictionary. It is used
+% at the end of the document in \cs{g__pdf_backend_end_run_tl}
+%    \begin{macrocode}
+% push to the register command / issue the special
+\cs_new_protected:Npn \@@_Pages_gpush:
+  {
+    \exp_args:Nx \__pdf_backend_Pages_primitive:n
+      {
+        \pdfdict_use:n { g__pdf_Core/Pages}
+      }
+  }
+
+%    \end{macrocode}
+% \end{macro}
+% \subsection{The Page and ThisPage dictionary}
+% At first the initialisation.
+%    \begin{macrocode}
+\pdfdict_new:n { g__pdf_Core/Page }
+\pdfdict_new:n { g__pdf_Core/ThisPage }
+
+%handler for pdfmanagement
+\cs_new_protected:cpn { @@_handler/Page/?_gput:nn } #1 #2
+  {
+    \__pdf_backend_Page_gput:nn { #1 }{ #2 }
+  }
+% remove:
+\cs_new_protected:cpn { @@_handler/Page/?_gremove:n } #1
+  {
+    \__pdf_backend_Page_gremove:n { #1 }
+  }
+
+% handler for pdfmanagement
+\cs_new_protected:cpn { @@_handler/ThisPage/?_gput:nn } #1 #2
+  {
+    \prop_gput:cnn  { \__kernel_pdfdict_name:n { g__pdf_Core/ThisPage } }{ #1 } { #2 }
+    \bool_if:NT \g_@@_active_bool
+      {
+        \__pdf_backend_ThisPage_gput:nn { #1 }{ #2 }
+      }
+  }
+
+\cs_new_protected:cpn { @@_handler/ThisPage/?_gremove:n } #1
+  {
+    \msg_warning:nnn { pdfmanagement } { no-removal }{ThisPage}
+  }
+
+\cs_new_protected:cpn { @@_handler/ThisPage/?_show: }
+  {
+    \msg_warning:nnn { pdfmanagement } { no-show }{ThisPage}
+  }
+
+%    \end{macrocode}
+% \subsubsection{\enquote{Page/Resources}: ExtGState, ColorSpace, Shading, Pattern}
+%    \begin{macrocode}
+\clist_const:Nn \c_@@_PageResources_clist
+  {
+    ExtGState,
+    ColorSpace,
+    Pattern,
+    Shading,
+  }
+
+\clist_map_inline:Nn \c_@@_PageResources_clist
+  {
+    \pdfdict_new:n { g__pdf_Core/Page/Resources/#1}
+  }
+%
+% setter:  #1 is the name of the resource
+\cs_new_protected:cpn { @@_handler/Page/Resources/ExtGState/?_gput:nn } #1 #2
+  {
+    \__pdf_backend_PageResources_gput:nnn {ExtGState} { #1 }{ #2 }
+  }
+
+\cs_new_protected:cpn { @@_handler/Page/Resources/ColorSpace/?_gput:nn } #1 #2
+  {
+    \__pdf_backend_PageResources_gput:nnn {ColorSpace} { #1 }{ #2 }
+  }
+
+\cs_new_protected:cpn { @@_handler/Page/Resources/Shading/?_gput:nn } #1 #2
+  {
+    \__pdf_backend_PageResources_gput:nnn {Shading} { #1 }{ #2 }
+  }
+
+\cs_new_protected:cpn { @@_handler/Page/Resources/Pattern/?_gput:nn } #1 #2
+  {
+    \__pdf_backend_PageResources_gput:nnn {Pattern} { #1 }{ #2 }
+  }
+%    \end{macrocode}
+% \subsubsection{\enquote{Catalog}}
+% The catalog has mixed entries: toplevel, subdictionaries, and entries
+% which must build arrays.
+% \begin{variable}[added=2019-08-24]
+%     {
+%      \c_@@_Catalog_toplevel_clist,
+%      \c_@@_Catalog_sub_clist,
+%      \c_@@_Catalog_seq_clist,
+%     }
+%  This variables hold the list of the various types of entries. With it
+%  the various \verb=_gput= commands are generated.
+%  \end{variable}
+%  \begin{macro}{ \@@_catalog_XX_gput:n }
+% Various commands to handle subentries and special cases.
+%    \begin{macrocode}
+\pdfdict_new:n { g__pdf_Core/Catalog}
+
+\clist_const:Nn \c_@@_Catalog_toplevel_clist
+  {
+    Collection,
+    DPartRoot,
+    Lang,
+    Legal,
+    Metadata,
+    NeedsRendering,
+    OCProperties/D,
+    OpenAction,
+    PageLabels,
+    PageLayout,
+    PageMode,
+    Perms,
+    PieceInfo,
+    SpiderInfo,
+    StructTreeRoot,
+    Threads,
+    URI,
+    Version
+  }
+
+\clist_const:Nn \c_@@_Catalog_sub_clist
+  {
+    AA,
+    AcroForm,
+    AcroForm/DR,
+    AcroForm/DR/Font,
+    MarkInfo,
+    ViewerPreferences,
+    OCProperties
+  }
+
+\clist_map_inline:Nn \c_@@_Catalog_sub_clist
+  {
+    \pdfdict_new:n { g__pdf_Core/Catalog/#1}
+  }
+
+
+\clist_const:Nn \c_@@_Catalog_seq_clist
+  {
+    AF,
+    OCProperties/OCGs,
+    OCProperties/Configs,
+    OutputIntents,
+    Requirements,
+    AcroForm/Fields,
+    AcroForm/CO
+  }
+
+
+
+\clist_map_inline:Nn \c_@@_Catalog_seq_clist
+ {
+   \seq_new:c { g_@@_/Catalog/#1_seq } % new name later
+   \cs_new_protected:cpn { @@_handler/Catalog/#1_gput:n } ##1
+     {
+       \seq_gput_right:cn { g_@@_/Catalog/#1_seq } {  ##1  }
+     }
+ }
+
+\cs_new_protected:cpn { @@_handler/Catalog/OCProperties/D_gput:n } #1
+  {
+    \seq_gput_left:cn
+      { g_@@_/Catalog/OCProperties/Configs_seq }
+      {  #1  }
+  }
+%    \end{macrocode}
+% \end{macro}
+% % \paragraph {Building the catalog: Push order}
+% \begin{macro}{\@@_Catalog_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_Catalog_gpush:
+  {
+    \use:c { @@_/Catalog/AA_gpush: }
+    \use:c { @@_/Catalog/AcroForm_gpush: }
+    \use:c { @@_/Catalog/AF_gpush: }
+    \use:c { @@_/Catalog/MarkInfo_gpush: }
+    \pdfmeta_standard_verify:nT {Catalog_no_OCProperties}
+      {
+        \use:c { @@_/Catalog/OCProperties_gpush: }
+      }
+    \use:c { @@_/Catalog/OutputIntents_gpush: }
+    \use:c { @@_/Catalog/Requirements_gpush: }
+    \use:c { @@_/Catalog/ViewerPreferences_gpush: }
+    % output the single values:
+    \prop_map_function:cN
+      { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog} }
+      \__pdf_backend_catalog_gput:nn
+    % output names tree:
+    \use:c { @@_/Catalog/Names/EmbeddedFiles_gpush: }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \paragraph{Building catalog entries: AA}
+% \begin{macro}{\@@_/Catalog/AA_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:cpn { @@_/Catalog/AA_gpush: }
+  {
+    \prop_if_empty:cF
+     { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AA } }
+     {
+       \__pdf_backend_object_new:nn  { g_@@_/Catalog/AA_obj } { dict }
+       \__pdf_backend_object_write:nx
+            { g_@@_/Catalog/AA_obj }
+            { \pdfdict_use:n { g__pdf_Core/Catalog/AA } }
+       \exp_args:Nnx
+         \__pdf_backend_catalog_gput:nn
+           {AA}
+           {
+             \__pdf_backend_object_ref:n { g_@@_/Catalog/AA_obj }
+           }
+     }
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+% \paragraph{Building catalog entries: AcroForm}
+% This is the most complicated case.
+% The entries is build from
+% /Catalog/AcroForm/Fields  (array),
+% /Catalog/AcroForm/CO      (array),
+% /Catalog/AcroForm/DR/Font (dict),
+% /Catalog/AcroForm/DR      (dict),
+% /Catalog/AcroForm
+%
+% \begin{macro}{\@@_/Catalog/AcroForm_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:cpn { @@_/Catalog/AcroForm_gpush: }
+  {
+    \seq_if_empty:cF { g_@@_/Catalog/AcroForm/Fields_seq }
+      {
+        \__pdf_backend_object_new:nn  { g_@@_/Catalog/AcroForm/Fields_obj } { array }
+        \__pdf_backend_object_write:nx
+            { g_@@_/Catalog/AcroForm/Fields_obj }
+            { \seq_use:cn { g_@@_/Catalog/AcroForm/Fields_seq } {~} }
+        \exp_args:Nnnx
+          \prop_gput:cnn %we have to use \prop here to avoid the handler ...
+            { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AcroForm } }
+            { Fields }
+            { \__pdf_backend_object_ref:n { g_@@_/Catalog/AcroForm/Fields_obj } }
+      }
+    \seq_if_empty:cF { g_@@_/Catalog/AcroForm/CO_seq }
+      {
+        \__pdf_backend_object_new:nn  { g_@@_/Catalog/AcroForm/CO_obj } { array }
+        \exp_args:Nnx
+          \__pdf_backend_object_write:nn
+            { g_@@_/Catalog/AcroForm/CO_obj }
+            { \seq_use:cn { g_@@_/Catalog/AcroForm/CO_seq } {~} }
+        \exp_args:Nnnx
+          \prop_gput:cnn %we have to use \prop here to avoid the handler ...
+            { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AcroForm } }
+            { CO }
+            { \__pdf_backend_object_ref:n { g_@@_/Catalog/AcroForm/CO_obj } }
+      }
+     \prop_if_empty:cF { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AcroForm/DR/Font}}
+       {
+         \__pdf_backend_object_new:nn { g_@@_/Catalog/AcroForm/DR/Font_obj } {dict}
+         \exp_args:Nnx
+           \__pdf_backend_object_write:nn
+             { g_@@_/Catalog/AcroForm/DR/Font_obj }
+             { \pdfdict_use:n { g__pdf_Core/Catalog/AcroForm/DR/Font } }
+         \exp_args:Nnnx
+           \prop_gput:cnn %we have to use \prop here to avoid the handler ...
+             { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AcroForm/DR } }
+             { Font }
+             { \__pdf_backend_object_ref:n { g_@@_/Catalog/AcroForm/DR/Font_obj } }
+       }
+     \prop_if_empty:cF { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AcroForm/DR}}
+       {
+         \__pdf_backend_object_new:nn { g_@@_/Catalog/AcroForm/DR_obj } {dict}
+         \exp_args:Nnx
+           \__pdf_backend_object_write:nn
+             { g_@@_/Catalog/AcroForm/DR_obj }
+             { \pdfdict_use:n { g__pdf_Core/Catalog/AcroForm/DR } }
+         \exp_args:Nnnx
+           \prop_gput:cnn %we have to use \prop here to avoid the handler ...
+             { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AcroForm } }
+             { DR }
+             { \__pdf_backend_object_ref:n { g_@@_/Catalog/AcroForm/DR_obj } }
+       }
+     \prop_if_empty:cF { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/AcroForm} }
+       {
+         \__pdf_backend_object_new:nn { g_@@_/Catalog/AcroForm_obj } {dict}
+         \exp_args:Nnx
+           \__pdf_backend_object_write:nn
+             { g_@@_/Catalog/AcroForm_obj }
+             { \pdfdict_use:n { g__pdf_Core/Catalog/AcroForm } }
+         \exp_args:Nnnx
+           \@@_handler_gput:nnn
+             { Catalog }
+             { AcroForm }
+             { \__pdf_backend_object_ref:n { g_@@_/Catalog/AcroForm_obj } }
+       }
+  }
+
+%    \end{macrocode}
+% \end{macro}
+%
+% \paragraph{Building catalog entries: AF}
+% AF is an array.
+% \begin{macro}{\@@_/Catalog/AF_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:cpn { @@_/Catalog/AF_gpush: }
+  {
+    \seq_if_empty:cF
+     { g_@@_/Catalog/AF_seq }
+     {
+       \__pdf_backend_object_new:nn  { g_@@_/Catalog/AF_obj } { array }
+       \exp_args:Nnx
+         \__pdf_backend_object_write:nn
+            { g_@@_/Catalog/AF_obj }
+            { \seq_use:cn { g_@@_/Catalog/AF_seq } {~} }
+       \exp_args:Nnx
+         \__pdf_backend_catalog_gput:nn
+           {AF}
+           {
+             \__pdf_backend_object_ref:n {g_@@_/Catalog/AF_obj}
+           }
+     }
+  }
+%    \end{macrocode}
+% \end{macro}
+% %
+% \paragraph{Building catalog entries: MarkInfo}
+% \begin{macro}{\@@_/Catalog/MarkInfo_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:cpn { @@_/Catalog/MarkInfo_gpush: }
+  {
+    \prop_if_empty:cF
+     { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/MarkInfo } }
+     {
+       \__pdf_backend_object_new:nn  { g_@@_/Catalog/MarkInfo_obj } { dict }
+       \exp_args:Nnx
+         \__pdf_backend_object_write:nn
+            { g_@@_/Catalog/MarkInfo_obj }
+            { \pdfdict_use:n { g__pdf_Core/Catalog/MarkInfo } }
+       \exp_args:Nnx
+         \__pdf_backend_catalog_gput:nn
+           {MarkInfo}
+           {
+             \__pdf_backend_object_ref:n {g_@@_/Catalog/MarkInfo_obj}
+           }
+     }
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+%\paragraph{Building catalog entries: OCProperties}
+%  This is a dictionary with three entries:
+%  \begin{description}
+%  \item[/OCGs] (required) An array of indirect references,
+%               access needed for more than one package.
+%  \item[/D] (required) a dict (given as an object name) to the default
+%            configuration
+%  \item[/Configs] (optional) an array of indirect references to more
+%        configurations.
+%  \end{description}
+%  The /D entry is also a config, it is the first of the seq.
+%  The overall structure is nested: a dict with arrays.
+% \begin{macro}{\@@_/Catalog/OCProperties_gpush:}
+%    \begin{macrocode}
+% Catalog/OCProperties: OCGs + D is required
+\cs_new_protected:cpn { @@_/Catalog/OCProperties_gpush: }
+  {
+   \int_compare:nNnT
+      {
+        ( \seq_count:c { g_@@_/Catalog/OCProperties/OCGs_seq }  )*
+        ( \seq_count:c { g_@@_/Catalog/OCProperties/Configs_seq } )
+      }
+      >
+      { 0 }
+      {
+        \__pdf_backend_object_new:nn  { g_@@_/Catalog/OCProperties_obj } { dict }
+        \seq_gpop_left:cN { g_@@_/Catalog/OCProperties/Configs_seq} \l_tmpa_tl
+        \exp_args:Nnx
+          \__pdf_backend_object_write:nn {g_@@_/Catalog/OCProperties_obj}
+            {
+              /OCGs~[ \seq_use:cn { g_@@_/Catalog/OCProperties/OCGs_seq } {~} ]
+              /D~\l_tmpa_tl~
+              \seq_if_empty:cF { g_@@_/Catalog/OCProperties/Configs_seq }
+                {
+                  /Configs~
+                  [ \seq_use:cn { g_@@_/Catalog/OCProperties/Configs_seq} {~} ]
+                }
+            }
+        \exp_args:Nnx
+          \__pdf_backend_catalog_gput:nn
+            { OCProperties }
+            { \__pdf_backend_object_ref:n {g_@@_/Catalog/OCProperties_obj} }
+      }
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+% \paragraph{Building catalog entries: OutputIntents}
+% OutputIntents is an array.
+% \begin{macro}{\@@_/Catalog/OutputIntents_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:cpn { @@_/Catalog/OutputIntents_gpush: }
+  {
+    \seq_if_empty:cF
+     { g_@@_/Catalog/OutputIntents_seq }
+     {
+       \__pdf_backend_object_new:nn  { g_@@_/Catalog/OutputIntents_obj } { array }
+       \exp_args:Nnx
+         \__pdf_backend_object_write:nn
+            { g_@@_/Catalog/OutputIntents_obj }
+            { \seq_use:cn { g_@@_/Catalog/OutputIntents_seq } {~} }
+       \exp_args:Nnx
+         \__pdf_backend_catalog_gput:nn
+           {OutputIntents}
+           {
+             \__pdf_backend_object_ref:n {g_@@_/Catalog/OutputIntents_obj}
+           }
+     }
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+% \paragraph{Building catalog entries: Requirements}
+% Requirements  is an array.
+% \begin{macro}{\@@_/Catalog/Requirements_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:cpn { @@_/Catalog/Requirements_gpush: }
+  {
+    \seq_if_empty:cF
+     { g_@@_/Catalog/Requirements_seq }
+     {
+       \__pdf_backend_object_new:nn  { g_@@_/Catalog/Requirements_obj } { array }
+       \exp_args:Nnx
+         \__pdf_backend_object_write:nn
+            { g_@@_/Catalog/Requirements_obj }
+            { \seq_use:cn { g_@@_/Catalog/Requirements_seq } {~} }
+       \exp_args:Nnx
+         \__pdf_backend_catalog_gput:nn
+           {Requirements}
+           {
+             \__pdf_backend_object_ref:n { g_@@_/Catalog/Requirements_obj }
+           }
+     }
+  }
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \paragraph{Building catalog entries: ViewerPreferences}
+% \begin{macro}{\@@_/Catalog/ViewerPreferences_gpush:}
+%    \begin{macrocode}
+\cs_new_protected:cpn { @@_/Catalog/ViewerPreferences_gpush: }
+  {
+    \prop_if_empty:cF
+     { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/ViewerPreferences } }
+     {
+       \__pdf_backend_object_new:nn  { g_@@_/Catalog/ViewerPreferences_obj } { dict }
+       \exp_args:Nnx
+         \__pdf_backend_object_write:nn
+            { g_@@_/Catalog/ViewerPreferences_obj }
+            { \pdfdict_use:n { g__pdf_Core/Catalog/ViewerPreferences } }
+       \exp_args:Nnx
+         \__pdf_backend_catalog_gput:nn
+           {ViewerPreferences}
+           {
+             \__pdf_backend_object_ref:n {g_@@_/Catalog/ViewerPreferences_obj}
+           }
+     }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \paragraph{Building catalog entries: Names/EmbeddedFiles}
+% \begin{NOTE}{UF}
+% TODO access function for the name in the name tree
+% \end{NOTE}
+% \begin{macro}{ Handler}
+% EmbeddedFiles is an array and needs a special handler to add values.
+%    \begin{macrocode}
+\pdfdict_new:n { g__pdf_Core/Catalog/Names }
+
+\cs_new_protected:cpn { @@_handler/Catalog/Names/EmbeddedFiles_gput:n } #1
+  {
+    \__pdf_backend_NamesEmbeddedFiles_add:n { #1 }
+  }
+%    \end{macrocode}
+% \end{macro}
+% The entry should only be added if there are actually embedded files.
+% This can be tested by checking the names_seq
+% \begin{macro}{\@@_/Catalog/Names/EmbeddedFiles_gpush:}
+%    \begin{macrocode}
+%
+\cs_new_protected:cpn { @@_/Catalog/Names/EmbeddedFiles_gpush: }
+  {
+    \seq_if_empty:NF \g__pdf_backend_EmbeddedFiles_seq
+      {
+        \exp_args:Nx \__pdf_backend_NamesEmbeddedFiles_gpush:n
+          {
+            \seq_use:Nn \g__pdf_backend_EmbeddedFiles_seq {~}
+          }
+      }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{@@_handler/Catalog/?_show:}
+% A handler to show the catalog.
+%    \begin{macrocode}
+\cs_new_protected:cpn {@@_handler/Catalog/?_show:}
+  {
+    \iow_term:x
+      {
+        \iow_newline:
+        The~Catalog~contains~in~the~top~level~the~single~value~entries
+        \prop_map_function:cN
+          {\__kernel_pdfdict_name:n { g__pdf_Core/Catalog }}
+          \msg_show_item:nn
+      }
+    \clist_map_inline:Nn \c_@@_Catalog_seq_clist
+     {
+       \seq_if_empty:cF {  g_@@_/Catalog/##1_seq }
+         {
+           \iow_term:x
+             {
+               The~'##1'~array~contains~the~entries
+               \seq_map_function:cN { g_@@_/Catalog/##1_seq } \msg_show_item:n
+             }
+         }
+      }
+    \clist_map_inline:Nn \c_@@_Catalog_sub_clist
+      {
+        \prop_if_empty:cF { \__kernel_pdfdict_name:n { g__pdf_Core/Catalog/##1 } }
+          {
+            \iow_term:x
+              {
+                The~Catalog~subdirectory~'##1'~contains~the~single~value~entries
+                \prop_map_function:cN
+                  {\__kernel_pdfdict_name:n { g__pdf_Core/Catalog/##1 }}
+                  \msg_show_item:nn
+              }
+          }
+      }
+    \tl_show:x {\tl_to_str:n{\pdfmanagement_show:n{Catalog}}}
+  }
+%    \end{macrocode}
+% \end{macro}
+% \subsection{ xform / Properties }
+%    \begin{macrocode}
+\pdfdict_new:n { g__pdf_Core/Xform/Resources/Properties}
+%    \end{macrocode}
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfmeta.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfmeta.dtx
new file mode 100644
index 00000000000..a374e39fc7f
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfmeta.dtx
@@ -0,0 +1,824 @@
+% \iffalse meta-comment
+%
+%% File: l3pdfmeta.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=l3pdfmeta (LaTeX PDF management testphase bundle)}
+
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \title{^^A
+%   The \pkg{l3pdfmeta} module\\ PDF standards  ^^A
+%   \\
+%   \LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-21}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{l3pdfmeta} documentation}
+% This module sets up some tools and commands needed
+% for PDF standards in general.
+% The goal is to collect the requirements and to provide code to check and fulfill them.
+%
+% In future is will probably also contain
+% code to setup XMP-metadata.
+% Until then XMP-metadata can be added by one of two mutual incompatible packages:
+% \pkg{hyperxmp} and \pkg{pdfx}. Both
+% packages aren't yet compatible with the new PDF management,
+% but for \pkg{hyperxmp} some patches are provided, so the basic functions works.
+%
+% \begin{NOTE}{UF}
+% This module should not replace both packages.
+% Regarding XMP-metadata its goal
+% is to create a skeleton metadata stream, add some core default values
+% and to define interfaces that allows other packages
+% to add data to this metadata and so to extend them.
+% The problems to solve here are
+% \begin{itemize}
+% \item which tree structure is sensible
+% \item how to escape if needed the input (or which tools are needed to allow
+% the users to correctly escape their input)
+% \item how interface to input data should look
+% \end{itemize}
+% \end{NOTE}
+%
+% \subsection{Verifying requirements of PDF standards}
+%
+% Standards like pdf/A set requirements on a PDF: Some things have be in the PDF,
+% e.g. the catalog has to contain a /Lang entry and an colorprofile and
+% an /OutputIntent, some other things are forbidden or restricted, e.g.
+% the action dictionary of an annotation should not contain Javascript.
+%
+% The \pkg{l3pdfmeta} module collects a number of relevant requirements,
+% tries to enforce the ones which can be enforced and offers some tools
+% for package authors to test if an action is allowed in the standard or not.
+%
+% This is work in progress and more tests will be added. But it should be noted
+% that it will probably never be possible to prevent all forbidden actions
+% or enforce all required ones or even to simply check all of them.
+% The commands here don't replace a check with an external validator.
+%
+% Verifying against a PDF-standard involves two different task:
+%
+% \begin{itemize}
+%   \item Check if you are allowed to ignore the requirement.
+%   \item Decide which action to take if the answer to the first question is NO.
+% \end{itemize}
+%
+% The following conditionals address the first task. Because of the second task
+% a return value |FALSE| means that the standard requires you to do some
+% special action. |TRUE| means that you can ignore this
+% requirement.\footnote{One could also make the logic the
+% other way round---there are arguments for both---but I had to decide.}
+%
+% In most cases it only matters if a requirement is in the standard,
+% for example |Catalog_no_OCProperties| means \enquote{don't use |/OCProperties|
+% in the catalog}. For a small number of requirements it is also needed to
+% test a user value against a standard value. For example, |named_actions|
+% restricts the allowed named actions in an annotation of subtype |/Named|,
+% in this case it is needed to check not only if the requirement is
+% in the standard but also if the user value is in the allowed list.
+%
+% \begin{function}[EXP,pTF]{\pdfmeta_standard_verify:n}
+% \begin{syntax}
+% \cs{pdfmeta_standard_verify:n}\Arg{requirement}
+% \end{syntax}
+%
+% This checks if \meta{requirement} is listed in the standard.
+% |FALSE| as result means that the requirement is in the standard and
+% that probably some special action is required---which one depends
+% on the requirement, see the descriptions below.
+% |TRUE| means that the requirement is not there and so no special
+% action is needed.
+% This check can be used for simple requirements where neither
+% a user nor a standard value is of importance.
+% \end{function}
+%
+% \begin{function}[TF]{\pdfmeta_standard_verify:nn}
+% \begin{syntax}
+% \cs{pdfmeta_standard_verify:nn}\Arg{requirement}\Arg{value}
+% \end{syntax}
+%
+% This checks if \meta{requirement} is listed in the standard,
+% if yes it tries to find a predefined test handler for
+% the requirement and passes \meta{value} and the value recorded
+% in the standard to it. The handler returns |FALSE| if some special
+% action is needed (e.g. if \meta{value} violates the rule)
+% and |TRUE| if no special action is needed. If no handler exists
+% this commands works like \cs{pdfmeta_standard_verify:n}.
+% \end{function}
+%
+% In some cases one needs to query the value in the standard,
+% e.g. to correct a wrong minimal PDF version you need to know
+% which version is required by |min_pdf_version|.
+%  For this two commands to access the value are provided:
+%
+% \begin{function}[EXP]{\pdfmeta_standard_item:n}
+% \begin{syntax}
+% \cs{pdfmeta_standard_item:n}\Arg{requirement}
+% \end{syntax}
+% This retrieves the value of \meta{requirement} and leaves it in the input.
+% If the requirement isn't in the standard the result is empty,
+% that means that requirements not in the standard and
+% requirement without values can not be distinguished here.
+% \end{function}
+%
+%
+% \begin{function}{\pdfmeta_standard_get:nN}
+% \begin{syntax}
+% \cs{pdfmeta_standard_get:nN}\Arg{requirement} \meta{tl var}
+% \end{syntax}
+% This retrieves the value of \meta{requirement} and stores
+% it in the \meta{token list variable}.
+% If the \meta{requirement} is not found the special
+% value |\q_no_value| is used.
+% The  \meta{token list variable} is assigned locally.
+% \end{function}
+%
+%
+% The following describe the requirements which can be currently tested.
+% Requirements with a value should use \cs{pdfmeta_standard_verify:nn}
+% or \cs{pdfmeta_standard_verify:nnN} to test a local value against the standard.
+% The rule numbers refer to \url{https://docs.verapdf.org/validation/pdfa-part1/}
+%
+% \subsubsection{Simple tests without handler}
+%
+% \begin{description}
+%
+% \item[|outputintent_A|] requires to embed a color profile and
+%  reference it in a /Outputintent and that all output intents reference
+%  the same colorprofile. The value stores the subtype.
+%  {\em This requirement is detected and fulfilled by \pkg{l3pdfmeta} if the
+%   provided interface in \cs{DeclareDocumentMetadata} is used, see below}.
+%
+% \item[|annot_flags|] in annotations the |Print| flag should be true,
+%  |Hidden|, |Invisible|, |NoView| should be false.
+%  {\em This requirement is detected  and set by \pkg{l3pdfmeta} for annotations
+%  created with the \pkg{l3pdfannot}.
+%  A new check is only needed if the flags are changed
+%  or if links are created by other means.}
+%
+% \item[|no_encryption|] don't encrypt
+% \item[|no_external_content|] no |/F|, |/FFilter|, or |/FDecodeParms|
+%  in stream dictionaries
+% \item[|no_embed_content|]    no |/EF| key in filespec, no |/Type/EmbeddedFiles|.
+%  \emph{This will be checked in future by \pkg{l3pdffiles}
+%  for the files it embeds.}
+%  The restrictment is set for only PDF/A-1b.
+%  PDF/A-2b and PDF/A3-b lifted this restriction: PDF/A-2b allows
+%  to embed other PDF documents conforming to either PDF/A-1 or PDF/A-2,
+%  and PDF/A-3 allows any embedded files. I don't see a way to test the
+%  PDF/A-2b requirement so currently it will simply allow everything. Perhaps
+%  a test for at least the PDF-format will be added in future.
+% \item[|Catalog_no_OCProperties|] don't add |/OCProperties| to the catalog
+% {\em l3pdfmeta removes this entry at the end of the document}
+% \item[|annot_widget_no_AA|] (rule 6.6.2-1)
+%  no AA dictionary in widget annotation,
+%  this will e.g. be checked by the new hyperref driver.
+% \item[|annot_widget_no_A_AA|] (rule 6.9-2)  no A and AA dictionary in widget.
+% \item[|form_no_AA|] (6.9-3)  no /AA dictionary in form field
+% \end{description}
+%
+% \subsubsection{Tests with values and special handlers}
+%
+% \begin{description}
+%
+% \item[|min_pdf_version|]  stores the minimal PDF version.
+%  It should be checked against the current PDF version (\cs{pdf_version:}).
+%  A failure means that the version should be changed.
+%  This check is done by \pkg{l3pdfmeta} when the version is set with
+%  \cs{DeclareDocumentMetadata} so more checks are only needed if the version is changed later.
+%
+% \item[|named_actions|]    this requirement restricts the list of
+% allowed named actions to |NextPage|, |PrevPage|, |FirstPage|, |LastPage|.
+% The check should supply the named action without slash
+% (e.g. |View| (failure) or |NextPage| (pass)).
+%
+% \item[|annot_action_A|] (rule 6.6.1-1) this requirement restricts
+%  the allowed subtypes of the
+% |/A| dictionary of an action. The check should supply the user
+%  subtype without slash e.g. as |GoTo| (pass) or |Movie| (failure).
+% \end{description}
+%
+% \subsection{Colorprofiles and OutputIntent}
+%
+% The pdf/A standards require that a color profile is embedded and
+% referenced in the catalog in the |/OutputIntent| array.
+%
+% The problem is that the pdf/A standards also require, that if the PDF has more then
+% one entry in the |/OutputIntent| array (which is allowed), their |/DestOutputProfile|
+% should all reference the same color profile\footnote{see rule 6.2.2-2 at
+% \url{https://docs.verapdf.org/validation/pdfa-part1/}}.
+%
+% Enforcing this fully is impossible if entries are added manually by users or
+% packages with |\pdfmanagement_add:nnn {Catalog}{OutputIntents}{|\meta{object reference}|}|
+% as it is difficult to inspect and remove entries from the |/OutputIntent| array.
+%
+% So we provide a dedicated interface to avoid the need of manual
+% user settings and allow the code to handle the requirements of the standard.
+% The interface doesn't handle yet all finer points for PDF/X standards, e.g.
+% named profiles, it is meant as a starting point to get at least PDF/A validation
+% here.
+%
+% \begin{NOTE}{UF}
+% The interface has to handle the following points:
+% \begin{itemize}
+% \item  We have to assume that some documents wants to add more
+%  than one OutputIntent with varying subtypes.
+% \item While currently only |/GTS_PDFA1| and |/GTS_PDFX| seem to
+% be relevant, we have to assume that the list of subtypes is open.
+% \item But we can imho assume that every subtype is there at most once.
+% \item The referenced color profile can be used also other means, e.g. an /ICCBased
+% color space. We must avoid that it is embedded twice in this case.
+% This will need coordination with l3color. It should probably provide the
+% code to embed the profile.
+% \item While we can predeclare some standard icc-profiles, an interface to
+% setup more is needed. This is currently not handled, as it needs
+% coordination with a setup in l3color too.
+% \item The implementation doesn't really handle yet all finer points for pdf/X
+% see \url{tn0002_color_in_pdfa-1_2008-03-141.pdf}
+% \end{itemize}
+% \end{NOTE}
+% The interface looks like this
+%
+% \begin{verbatim}
+%  \DeclareDocumentMetadata
+%    {
+%      %other options for example pdfstandard
+%       colorprofiles=
+%        {
+%          A = sRGB.icc, %or a or longer GTS_PDFA1 = sRGB.icc
+%          X = FOGRA39L_coated.icc, % or x or longer GTS_PDFX
+%          ISO_PDFE1 = whatever.icc
+%        }
+%
+%    }
+% \end{verbatim}
+%
+% |sRGB.icc| and |FOGRA39L_coated.icc| (from the \pkg{colorprofiles} package
+% are predefined and will work directly\footnote{The \texttt{dvips} route
+% will require that \texttt{ps2pdf} is called with \texttt{-dNOSAFER},
+% and that the color profiles are in the current folder as \texttt{ps2pdf} doesn't
+% use \texttt{kpathsea} to find them.}. |whatever.icc| will need special setup in
+% the document preamble to declare the values for the
+% |OutputIntent| dictionary, but the interface hasn't be added yet. This will be
+% decided later.
+%
+%
+% If an A-standard is detected or set which requires
+% that all |/DestOutputProfile| reference the same
+% color profile, the setting is changed to the equivalent of
+%
+% \begin{verbatim}
+%  \DeclareDocumentMetadata
+%    {
+%      %other options
+%       pdfstandard=A-2b,
+%       colorprofiles=
+%        {
+%          A = sRGB.icc, %or longer GTS_PDFA1 = sRGB.icc
+%          X = sRGB.icc,
+%          ISO_PDFE1 = sRGB.icc
+%        }
+%
+%    }
+% \end{verbatim}
+%
+% The pdf/A standards will use |A=sRGB.icc| by default, so this doesn't
+% need to be declared explicitly.
+%
+%
+% \end{documentation}
+%
+% \begin{implementation}
+%
+% \section{\pkg{l3pdfmeta} implementation}
+%
+%    \begin{macrocode}
+%<@@=pdfmeta>
+%<*header>
+\ProvidesExplPackage {l3pdfmeta} {2021-02-22} {0.95a}
+  {PDF-Standards---LaTeX PDF management testphase bundle}
+%</header>
+%    \end{macrocode}
+% Message for unknown standards
+%    \begin{macrocode}
+%<*package>
+\msg_new:nnn  {pdf }{unknown-standard}{The~standard~'#1'~is~unknown~and~has~been~ignored}
+%    \end{macrocode}
+% \begin{variable}{\l_@@_tmpa_tl,\l_@@_tmpb_tl,\l_@@_tmpa_str}
+%    \begin{macrocode}
+\tl_new:N\l_@@_tmpa_tl
+\tl_new:N\l_@@_tmpb_tl
+\str_new:N \l_@@_tmpa_str
+%    \end{macrocode}
+% \end{variable}
+% \subsection{Standards (work in progress)}
+% \subsubsection{Tools and tests}
+% This internal property will contain for now the settings for the document.
+% \begin{variable}{\g_@@_standard_prop}
+%    \begin{macrocode}
+\prop_new:N \g_@@_standard_prop
+%    \end{macrocode}
+% \end{variable}
+% \subsubsection{Functions to check a requirement}
+% At first two commands to get the standard value if needed:
+% \begin{macro}[EXP]{\pdfmeta_standard_item:n}
+%    \begin{macrocode}
+\cs_new:Npn \pdfmeta_standard_item:n #1
+ {
+   \prop_item:Nn \g_@@_standard_prop {#1}
+ }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\pdfmeta_standard_get:nN}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfmeta_standard_get:nN #1 #2
+ {
+   \prop_get:NnN \g_@@_standard_prop {#1} #2
+ }
+%    \end{macrocode}
+% \end{macro}
+% Now two functions to check the requirement. A simple and one value/handler based.
+% \begin{macro}[pTF]{\pdfmeta_standard_verify:n}
+%  This is a simple test is the requirement is in the prop.
+%    \begin{macrocode}
+\prg_new_conditional:Npnn \pdfmeta_standard_verify:n #1 {T,F,TF}
+  {
+     \prop_if_in:NnTF \g_@@_standard_prop {#1}
+       {
+         \prg_return_false:
+       }
+       {
+         \prg_return_true:
+       }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}[TF]{\pdfmeta_standard_verify:nn}
+% This allows to test against a user value. It calls a test handler if this
+% exists and passes the user and the standard value to it. The test
+% handler should return true or false.
+%    \begin{macrocode}
+\prg_new_protected_conditional:Npnn \pdfmeta_standard_verify:nn #1 #2  {T,F,TF}
+  {
+    \prop_if_in:NnTF \g_@@_standard_prop {#1}
+      {
+        \cs_if_exist:cTF {@@_standard_verify_handler_#1:nn}
+          {
+            \exp_args:Nnnx
+            \use:c
+              {@@_standard_verify_handler_#1:nn}
+              { #2 }
+              { \prop_item:Nn \g_@@_standard_prop {#1} }
+          }
+          {
+            \prg_return_false:
+          }
+      }
+      {
+        \prg_return_true:
+      }
+   }
+%    \end{macrocode}
+% \end{macro}
+%
+% Now we setup a number of handlers.
+%
+% The first actually ignores the user values and tests against the
+% current pdf version. If this is smaller than the minimum we report a failure.
+% |#1| is the user value, |#2| the reference value from the standard.
+% \begin{macro}{\@@_standard_verify_handler_min_pdf_version:nn}
+%    \begin{macrocode}
+%
+\cs_new_protected:Npn \@@_standard_verify_handler_min_pdf_version:nn #1 #2
+ {
+   \pdf_version_compare:NnTF <
+     { #2 }
+     {\prg_return_false:}
+     {\prg_return_true:}
+ }
+%    \end{macrocode}
+% \end{macro}
+% The next checks if the user value is in the list and returns a failure if not.
+% \begin{macro}{\@@_standard_verify_handler_named_actions:nn}
+%    \begin{macrocode}
+
+\cs_new_protected:Npn \@@_standard_verify_handler_named_actions:nn #1 #2
+ {
+   \tl_if_in:nnTF { #2 }{ #1 }
+     {\prg_return_true:}
+     {\prg_return_false:}
+ }
+%    \end{macrocode}
+% \end{macro}
+% The next checks if the user value is in the list and returns a failure if not.
+% \begin{macro}{\@@_standard_verify_handler_annot_action_A:nn}
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_standard_verify_handler_annot_action_A:nn #1 #2
+ {
+   \tl_if_in:nnTF { #2 }{ #1 }
+     {\prg_return_true:}
+     {\prg_return_false:}
+ }
+%    \end{macrocode}
+% \end{macro}
+% This check is probably not needed, but for completeness
+% \begin{macro}{\@@_standard_verify_handler_outputintent_subtype:nn}
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_standard_verify_handler_outputintent_subtype:nn #1 #2
+ {
+   \tl_if_eq:nnTF { #2 }{ #1 }
+     {\prg_return_true:}
+     {\prg_return_false:}
+ }
+%    \end{macrocode}
+% \end{macro}
+% \subsubsection{Enforcing requirements}
+%  A number of requirements can sensibly be enforced by us.
+%  \paragraph{Annot flags}
+% pdf/A require a number of settings here, we store them in a command which
+% can be added to the property of the standard:
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_verify_pdfa_annot_flags:
+  {
+    \bitset_set_true:Nn  \l_pdfannot_F_bitset {Print}
+    \bitset_set_false:Nn \l_pdfannot_F_bitset {Hidden}
+    \bitset_set_false:Nn \l_pdfannot_F_bitset {Invisible}
+    \bitset_set_false:Nn \l_pdfannot_F_bitset {NoView}
+    \pdfannot_dict_put:nnn {link/URI}{F}{ \bitset_to_arabic:N \l_pdfannot_F_bitset }
+    \pdfannot_dict_put:nnn {link/GoTo}{F}{ \bitset_to_arabic:N \l_pdfannot_F_bitset }
+    \pdfannot_dict_put:nnn {link/GoToR}{F}{ \bitset_to_arabic:N \l_pdfannot_F_bitset }
+    \pdfannot_dict_put:nnn {link/Launch}{F}{ \bitset_to_arabic:N \l_pdfannot_F_bitset }
+    \pdfannot_dict_put:nnn {link/Named}{F}{ \bitset_to_arabic:N \l_pdfannot_F_bitset }
+  }
+%    \end{macrocode}
+% At begin document this should be checked:
+%    \begin{macrocode}
+\hook_gput_code:nnn {begindocument} {pdf}
+  {
+    \pdfmeta_standard_verify:nF { annot_flags }
+     { \@@_verify_pdfa_annot_flags: }
+  }
+%    \end{macrocode}
+%
+%  \subsubsection{pdf/A}
+%  We use global properties so that follow up standards can be
+%  copied and then adjusted.
+%  Some note about requirements for more standard can
+%  be found in info/pdfstandard.tex.
+%  \begin{variable}{
+%   \g_@@_standard_pdf/A-1B_prop ,
+%   \g_@@_standard_pdf/A-2B_prop ,
+%   \g_@@_standard_pdf/A-3B_prop
+%   }
+%     \begin{macrocode}
+\prop_new:c { g_@@_standard_pdf/A-1B_prop }
+\prop_set_from_keyval:cn { g_@@_standard_pdf/A-1B_prop }
+  {
+    ,name             = pdf/A-1B
+    ,type             = A
+    ,year             = 2005
+    ,min_pdf_version  = 1.4        %minimum
+    ,no_encryption    =
+    ,no_external_content =  % no F, FFilter, or FDecodeParms in stream dicts
+    ,no_embed_content = % no EF key in filespec, no /Type/EmbeddedFiles
+    ,max_string_size  = 65535
+    ,max_array_size   = 8191
+    ,max_dict_size    = 4095
+    ,max_obj_num      = 8388607
+    ,max_nest_qQ      = 28
+    ,named_actions    = {NextPage, PrevPage, FirstPage, LastPage}
+    ,annot_flags      =
+    %booleans. Only the existence of the key matter.
+    %If the entry is added it means a requirements is there
+    %(in most cases "don't use ...")
+    %
+    %===============
+    % Rule 6.1.13-1 CosDocument, isOptionalContentPresent == false
+      ,Catalog_no_OCProperties =
+    %===============
+    % Rule 6.6.1-1: PDAction, S == "GoTo" || S == "GoToR" || S == "Thread"
+    %               || S == "URI" || S == "Named" || S == "SubmitForm"
+    % means: no /S/Launch, /S/Sound, /S/Movie, /S/ResetForm, /S/ImportData,
+    %        /S/JavaScript, /S/Hide
+      ,annot_action_A        = {GoTo,GoToR,Thread,URI,Named,SubmitForm}
+    %===============
+    % Rule 6.6.2-1: PDAnnot, Subtype != "Widget" || AA_size == 0
+    % means: no AA dictionary
+      ,annot_widget_no_AA      =
+    %===============
+    % Rule 6.9-2: PDAnnot, Subtype != "Widget" || (A_size == 0 && AA_size == 0)
+    % (looks like a tightening of the previous rule)
+      ,annot_widget_no_A_AA    =
+    %===============
+    % Rule 6.9-1 PDAcroForm, NeedAppearances == null || NeedAppearances == false
+    ,form_no_NeedAppearances =
+    %===============
+    %Rule 6.9-3 PDFormField, AA_size == 0
+    ,form_no_AA              =
+    %===============
+    % to be continued https://docs.verapdf.org/validation/pdfa-part1/
+    % - Outputintent/colorprofiles requirements
+    % an outputintent should be loaded and is unique.
+    ,outputintent_A         = {GTS_PDFA1}
+    % - no Alternates key in image dictionaries
+    % - no OPI, Ref, Subtype2 with PS key in xobjects
+    % - Interpolate  = false in images
+    % - no TR, TR2 in ExtGstate
+  }
+
+%A-2b ==============
+\prop_new:c { g_@@_standard_pdf/A-2B_prop }
+\prop_gset_eq:cc
+  { g_@@_standard_pdf/A-2B_prop }
+  { g_@@_standard_pdf/A-1B_prop }
+\prop_gput:cnn
+  { g_@@_standard_pdf/A-2B_prop }{name}{pdf/A-2B}
+\prop_gput:cnn
+  { g_@@_standard_pdf/A-2B_prop }{year}{2011}
+% embedding files is allowed (with restrictions)
+\prop_gremove:cn
+  { g_@@_standard_pdf/A-2B_prop }
+  { embed_content}
+
+%A-3b ==============
+\prop_new:c { g_@@_standard_pdf/A-3B_prop }
+\prop_gset_eq:cc
+  { g_@@_standard_pdf/A-3B_prop }
+  { g_@@_standard_pdf/A-2B_prop }
+\prop_gput:cnn
+  { g_@@_standard_pdf/A-3B_prop }{name}{pdf/A-3B}
+\prop_gput:cnn
+  { g_@@_standard_pdf/A-2B_prop }{year}{2012}
+% embedding files is allowed (with restrictions)
+\prop_gremove:cn
+  { g_@@_standard_pdf/A-3B_prop }
+  { embed_content}
+%    \end{macrocode}
+% \end{variable}
+%
+% \subsubsection{Colorprofiles and Outputintents}
+% The following provides a minimum of interface to add a color profile
+% and an outputintent need for PDF/A for now. There will be need to extend it later,
+% so we try for enough generality.
+%
+% Adding a profile and an intent is technically easy:
+% \begin{enumerate}
+% \item Embed the profile as stream with
+% \begin{verbatim}
+%  \pdf_object_unnamed_write:nn{fstream} {{/N~4}{XXX.icc}}
+% \end{verbatim}
+% \item Write a |/OutputIntent| dictionary for this
+% \begin{verbatim}
+% \pdf_object_unnamed_write:nx {dict}
+%  {
+%    /Type /OutputIntent
+%    /S /GTS_PDFA1  % or GTS_PDFX or ISO_PDFE1 or ...
+%    /DestOutputProfile \pdf_object_ref_last: % ref the color profile
+%    /OutputConditionIdentifier ...
+%    ... %more info
+%  }
+% \end{verbatim}
+% \item Reference the dictionary in the catalog:
+% \begin{verbatim}
+% \pdfmanagement_add:nnx {Catalog}{OutputIntents}{\pdf_object_ref_last:}
+% \end{verbatim}
+% \end{enumerate}
+% But we need to do a bit more work, to get the interface right.
+% The object for the profile should be named, to allow l3color to reuse it
+% if needed. And we need container to store the profiles, to handle the
+% standard requirements.
+%
+% \begin{variable}{\g_@@_outputintents_prop}
+% This variable will hold the profiles for the subtypes. We assume
+% that every subtype has only only color profile.
+%    \begin{macrocode}
+\prop_new:N \g_@@_outputintents_prop
+%    \end{macrocode}
+% \end{variable}
+% Some keys to fill the property.
+%    \begin{macrocode}
+\keys_define:nn { document / metadata }
+  {
+    colorprofiles .code:n =
+     {
+       \keys_set:nn { document / metadata / colorprofiles }{#1}
+     }
+  }
+\keys_define:nn { document / metadata / colorprofiles }
+ {
+   ,A .code:n =
+      {
+        \tl_if_blank:nF {#1}
+          {
+            \prop_gput:Nnn \g_@@_outputintents_prop
+             { GTS_PDFA1  } {#1}
+          }
+      }
+   ,a .code:n =
+      {
+        \tl_if_blank:nF {#1}
+          {
+            \prop_gput:Nnn \g_@@_outputintents_prop
+              { GTS_PDFA1  } {#1}
+          }
+      }
+   ,X .code:n =
+      {
+        \tl_if_blank:nF {#1}
+          {
+             \prop_gput:Nnn \g_@@_outputintents_prop
+              { GTS_PDFX  } {#1}
+          }
+      }
+   ,x .code:n =
+      {
+        \tl_if_blank:nF {#1}
+          {
+            \prop_gput:Nnn \g_@@_outputintents_prop
+              { GTS_PDFX  } {#1}
+          }
+      }
+   ,unknown .code:n =
+     {
+       \tl_if_blank:nF {#1}
+          {
+           \exp_args:NNo
+            \prop_gput:Nnn \g_@@_outputintents_prop
+              { \l_keys_key_str  } {#1}
+          }
+     }
+ }
+%    \end{macrocode}
+% At first we setup our two default profiles. This is internal as
+% the public interface is still undecided.
+%    \begin{macrocode}
+\pdfdict_new:n   {l_pdfmeta/outputintent}
+\pdfdict_put:nnn {l_pdfmeta/outputintent}
+  {Type}{/OutputIntent}
+\prop_const_from_keyval:cn { c_@@_colorprofile_sRGB.icc}
+  {
+    ,OutputConditionIdentifier=IEC~sRGB
+    ,Info=IEC~61966-2.1~Default~RGB~colour~space~-~sRGB
+    ,RegistryName=http://www.iec.ch
+    ,N = 3
+  }
+\prop_const_from_keyval:cn { c_@@_colorprofile_FOGRA39L_coated.icc}
+  {
+    ,OutputConditionIdentifier=FOGRA39L~Coated
+    ,Info={Offset~printing,~according~to~ISO~12647-2:2004/Amd~1,~OFCOM,~ %
+           paper~type~1~or~2~=~coated~art,~115~g/m2,~tone~value~increase~
+           curves~A~(CMY)~and~B~(K)}
+    ,RegistryName=http://www.fogra.org
+    ,N = 4
+  }
+%    \end{macrocode}
+% \begin{macro}{\@@_embed_colorprofile:n,\@@_write_outputintent:nn}
+% The commands embed the profile, and write the dictionary and add it to
+% the catalog. The first command should perhaps be moved to l3color
+% as it needs such profiles too. We used named objects so that we can
+% check if the profile is already there. This is not full proof if pathes are
+% used.
+%    \begin{macrocode}
+\cs_new_protected:Npn \@@_embed_colorprofile:n #1%#1 file name
+  {
+    \pdf_object_if_exist:nF { __color_icc_ #1 }
+      {
+        \pdf_object_new:nn  { __color_icc_ #1 }{fstream}
+        \pdf_object_write:nx { __color_icc_ #1 }
+         {
+           {/N\c_space_tl
+             \prop_item:cn{c_@@_colorprofile_#1}{N}
+           }
+           {#1}
+         }
+      }
+  }
+
+\cs_new_protected:Npn \@@_write_outputintent:nn #1 #2 %#1 file name, #2 subtype
+  {
+    \group_begin:
+     \pdfdict_put:nnx {l_pdfmeta/outputintent}{S}{/\str_convert_pdfname:n{#2}}
+     \pdfdict_put:nnx {l_pdfmeta/outputintent}
+       {DestOutputProfile}
+       {\pdf_object_ref:n{ __color_icc_ #1 }}
+     \clist_map_inline:nn { OutputConditionIdentifier, Info, RegistryName }
+       {
+         \prop_get:cnNT
+          { c_@@_colorprofile_#1}
+          { ##1 }
+          \l_@@_tmpa_tl
+          {
+            \pdf_string_from_unicode:nVN {utf8/string}\l_@@_tmpa_tl\l_@@_tmpa_str
+            \pdfdict_put:nnx
+              {l_pdfmeta/outputintent}{##1}{\l_@@_tmpa_str}
+          }
+       }
+     \pdf_object_unnamed_write:nx {dict}{\pdfdict_use:n {l_pdfmeta/outputintent} }
+     \pdfmanagement_add:nnx {Catalog}{OutputIntents}{\pdf_object_ref_last:}
+    \group_end:
+  }
+%    \end{macrocode}
+% \end{macro}
+% Now the verifying code.
+% If no requirement is set we simply loop over the property
+%    \begin{macrocode}
+
+\AddToHook{begindocument/end}
+  {
+    \pdfmeta_standard_verify:nTF {outputintent_A}
+      {
+         \prop_map_inline:Nn \g_@@_outputintents_prop
+           {
+             \@@_embed_colorprofile:n
+               {#2}
+             \@@_write_outputintent:nn
+               {#2}
+               {#1}
+           }
+      }
+%    \end{macrocode}
+% If an output intent is required for pdf/A we need to ensure, that the key of
+% default subtype has a value, as default we take sRGB.icc.
+% Then we loop but take always the same profile.
+%    \begin{macrocode}
+      {
+         \exp_args:NNx
+         \prop_if_in:NnF
+           \g_@@_outputintents_prop
+           { \pdfmeta_standard_item:n { outputintent_A } }
+           {
+             \exp_args:NNx
+             \prop_gput:Nnn
+               \g_@@_outputintents_prop
+               { \pdfmeta_standard_item:n { outputintent_A } }
+               { sRGB.icc }
+           }
+         \exp_args:NNx
+         \prop_get:NnN
+           \g_@@_outputintents_prop
+           { \pdfmeta_standard_item:n { outputintent_A } }
+           \l_@@_tmpb_tl
+         \exp_args:NV \@@_embed_colorprofile:n \l_@@_tmpb_tl
+         \prop_map_inline:Nn \g_@@_outputintents_prop
+           {
+             \exp_args:NV
+             \@@_write_outputintent:nn
+               \l_@@_tmpb_tl
+               { #1 }
+           }
+       }
+   }
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdftools.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdftools.dtx
new file mode 100644
index 00000000000..481ddce8724
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdftools.dtx
@@ -0,0 +1,427 @@
+% \iffalse meta-comment
+%
+%% File: l3pdftools.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=l3pdftools (LaTeX PDF management testphase bundle)}
+
+\providecommand\potentialclash{\noindent\llap{\dbend\ }}
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \title{^^A
+%   The \pkg{l3pdftools} module\\ temporary collection of pdf related commands ^^A
+%   \\ LaTeX PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{l3pdftools} documentation}
+%
+% This module collects a number of candidate commands for the l3pdf module
+%
+% \begin{function}[EXP,added=2021-02-14]
+%   {\pdf_name_from_unicode_e:n}
+%  \begin{syntax}
+%   \cs{pdf_name_from_unicode_e:n}  \Arg{content}
+%  \end{syntax}
+%  This converts \meta{content} to a format suitable for a PDF Name.
+%  It will first expand the content with \cs{text_expand:n} and
+%  then escape it in the way needed in a PDF Name with
+%  \cs{str_convert_pdfname:e}, and at last prepend a slash before.
+%  Typically such names use only ascii,
+%  but non-ascii is supported, but should be utf8 encoded. For example\\
+%  |\pdf_name_from_unicode_e:n {A~B\c_percent_str C\c_hash_str D€}}|\\
+%   will    output |/A#20B#25C#23D#E2#82#AC|.
+% \end{function}
+% \begin{function}[added=2020-07-04]
+%   {\pdf_string_from_unicode:nnN}
+%  \begin{syntax}
+%   \cs{pdf_string_from_unicode:nnN}  \Arg{format}  \Arg{content} \Arg{tlvar}
+%  \end{syntax}
+%  This converts \meta{content} following the rules defined by \meta{format} and stores
+%  the result in \meta{tlvar}. The assignment is done locally.
+%  Non-ascii input should be utf8 encoded.
+%  Currently the following formats exist:
+%  \begin{description}
+%     \item[utf8/string-raw]
+%      this converts with \cs{str_set_convert:Nnnn} into utf8/string.
+%     \item[utf8/string]
+%      this converts into utf8/string and adds parentheses around the result.%
+%     \item[utf8/URI-raw]
+%      this converts with \cs{str_set_convert:Nnnn} into utf8/url and
+%      then replaces reserved and digits back from the percent encoding. Parentheses
+%      are escaped.
+%     \item[utf8/URI]
+%      this converts into utf8/URI  and adds parentheses around the result.%
+%     \item[utf16/string-raw]
+%      this converts with \cs{str_set_convert:Nnnn} into utf16/string.
+%     \item[utf16/string]
+%      this converts into utf16/string and adds parentheses around the result.
+%     \item[utf16/hex-raw]
+%      this converts into utf16/hex
+%     \item[utf16/hex]
+%     this converts into utf16/hex and adds bracket around the result.
+%   \end{description}
+% \end{function}
+%
+% \subsection{BDC operator / Properties resource}
+% \begin{NOTE}{UF}
+%  we need a switch for the case that the resource should be added to
+%  xform resource instead of a page resources, see pdfbase.sty
+% - xdvipdfmx: looks fine, the resource is added to the xform resource automatically
+% - pdftex should now work okay too
+% \end{NOTE}
+% Entries to the /Properties dictionary in the page resources can
+% be added with dvips only through side-effects: if a BDC-mark is created
+% dvips/ghostscript will automatically create the necessary objects and names.
+% To get a sensible abstraction the code does the same for the other backends if the
+% core management code has been activated. This means that the behaviour
+% of the command is different then. The \cs{pdf_bdcobject:..} should only be used
+% if the management is active.
+% \begin{function}[updated = 2020-07-03]
+%   {
+%     \pdf_bdc:nn
+%   }
+%   \begin{syntax}
+%     \cs{pdf_bdc:nn} \Arg{tag} \Arg{dictionary content}
+%   \end{syntax}
+%    This command adds a BDC marked content operator to the current page stream.
+%   \meta{tag} is the tag of this operator (without the leading slash),
+%   \meta{dictionary content} is the content of the second argument.
+%   If the PDF resource management is active an dictionary object with the
+%   content is created and referenced with a name in the BDC operator.
+%   Without the resource management the content is used directly. It then
+%   depends on the backend how it is handled: with dvips a name is used
+%   while the pdfmode engines and dvipdfmx write the content into the stream.
+%
+% \end{function}
+% \begin{function}[added = 2020-07-03]
+%   {
+%     \pdf_bdcobject:nn
+%   }
+%   \begin{syntax}
+%     \cs{pdf_bdcobject:nn} \Arg{tag} \Arg{object name}
+%   \end{syntax}
+%   This command adds a BDC marked content operator to the current page stream.
+%   \meta{tag} is the tag of this operator (without the leading slash),
+%   \meta{object name}  is a the name of an dictionary object reserved with
+%   \cs{pdf_object_new:nn} and filled with \cs{pdf_object_write:n} with
+%   the properties of the BDC. Reusing a predefined object can save space
+%   but the command works correctly
+%   only if the resources management has been activated and should be used only
+%   if this can be ensured.
+% \end{function}
+% \begin{function}[updated = 2020-07-03]
+%   {
+%     \pdf_bdcobject:n
+%   }
+%   \begin{syntax}
+%     \cs{pdf_bdcobject:n} \Arg{tag}
+%   \end{syntax}
+%    This command adds a BDC marked content operator to the current page stream.
+%   \meta{tag} is the tag of this operator (without the leading slash).
+%   As object this commands uses the last anonymous dictionary object created with
+%   \cs{pdf_object_now:nn}. It lies in the responsibility of the user that the last
+%   object is the wanted one. Like with \cs{pdf_bdcobject:nn} the command works correctly
+%   only if the resources management has been activated and should be used only
+%   if this can be ensured.
+% \end{function}
+% \begin{function}[added = 2019-10-17]
+%   {
+%     \pdf_bmc:n
+%   }
+%   \begin{syntax}
+%     \cs{pdf_bmc:n} \Arg{tag}
+%   \end{syntax}
+%    This command created a BMC marked content operator. The argument is the
+%    tag without the leading slash. It can be e.g. used for simple artifact
+%    markers.
+% \end{function}
+% \begin{function}[added = 2019-06-30]
+%   {
+%     \pdf_emc:
+%   }
+%   \begin{syntax}
+%     \cs{pdf_emc:}
+%   \end{syntax}
+%    This command closes the  BDC marked content operator opened with \cs{pdf_bdc:nn}.
+%    It should be on the same page as the bdc-command.
+%
+%   \begin{verbatim}
+%   \pdf_object_new:nn   {objA}{dict}
+%   \pdf_object_write:nn {objA}{/Type/Artifact}
+%   \pdf_bdc:nn {Span}{objA}
+%   text
+%   \pdf_emc:
+%   \end{verbatim}
+% \end{function}
+%
+%
+% \end{documentation}
+%
+% \begin{implementation}
+%
+% \section{\pkg{l3pdftools} implementation}
+%
+%    \begin{macrocode}
+%<*header>
+\ProvidesExplPackage {l3pdftools} {2021-02-22} {0.95a}
+  {candidate commands for l3pdf---LaTeX PDF management testphase bundle}
+%</header>
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<@@=pdf>
+%<*package>
+%    \end{macrocode}
+% \subsection{Conversions and export functions}
+% \begin{macro}{\pdf_name_from_unicode_e:n,\pdf_name_from_unicode_e:V}
+%    \begin{macrocode}
+\cs_generate_variant:Nn \str_convert_pdfname:n { e }
+
+\cs_new:Npn \pdf_name_from_unicode_e:n #1
+  {
+    / \str_convert_pdfname:e { \text_expand:n { #1 } }
+  }
+
+\cs_generate_variant:Nn \pdf_name_from_unicode_e:n {V}
+%    \end{macrocode}
+% \end{macro}
+%
+% The convert command must use a different value the source encoding
+% depending on the engines. Until the PR in str-convert is active we add the alias here
+% too
+%    \begin{macrocode}
+\bool_lazy_any:nTF
+  {
+    \sys_if_engine_luatex_p:
+    \sys_if_engine_xetex_p:
+  }
+  {
+    \prop_gput:Nnn \g__str_alias_prop { default } {  }
+  }
+  {
+    \prop_gput:Nnn \g__str_alias_prop { default } { utf8 }
+  }
+%    \end{macrocode}
+% \begin{macro}{\pdf_string_from_unicode:nnN}
+%    \begin{macrocode}
+\cs_new:Npn \pdf_string_from_unicode:nnN #1 #2 #3
+  {
+    \cs_if_exist_use:cF { @@_string_from_unicode_#1:nN }
+      {
+        \__kernel_msg_error:nnn { pdf } { unknown-convert } {#1}
+        \use_none:nn
+      }
+    { #2 } #3
+  }
+
+\cs_generate_variant:Nn \pdf_string_from_unicode:nnN {nVN}
+%    \end{macrocode}
+% \end{macro}
+% Most converter are simply wrapper around the str-convert commands and so
+% use the same names, with the addition raw if no delimiters are added.
+% The exception is the one for url's: it reverts most of the percent encodings
+% and escapes the parentheses.
+% That's why its name is URI instead of url. The current code is probably quite
+% slow and will need a replacement.
+% \begin{macro}{ @@_string_from_unicode_utf8/string-raw:nN }
+% \begin{macro}{ @@_string_from_unicode_utf8/string:nN }
+% \begin{macro}{ @@_string_from_unicode_utf8/URI-raw:nN }
+% \begin{macro}{ @@_string_from_unicode_utf8/URI:nN }
+% \begin{macro}{ @@_string_from_unicode_utf16/string-raw:nN }
+% \begin{macro}{ @@_string_from_unicode_utf16/string:nN }
+% \begin{macro}{ @@_string_from_unicode_utf16/hex-raw:nN }
+% \begin{macro}{ @@_string_from_unicode_utf16/hex:nN }
+%    \begin{macrocode}
+%% TODO Names need a review when it is clear which converters
+%% are actually needed
+%% string conversions and printing
+%% we assume here that the text purify step has been done. The input is
+%% a list of (utf8) chars.
+%% str convert, not expandable.
+%  filespec (attachment view)  tests:
+%  utf8:  gr\303\274\303\237e.txt
+%    %doesn't work, umlaut wrong,
+%  utf8 with BOM \357\273\277gr\303\274\303\237e.txt
+%    %doesn't work, umlaut wrong, bom visible
+%  utf16 with BE: (FEFF)
+%   \376\377\000g\000r\000\374\000\337\000e\000.\000t\000x\000t %works
+%                xetex converts to <feff0067007200fc00df0065002e007400780074>
+%  utf16 with BE / HEX: <FEFF0067007200FC00DF0065002E007400780074> works
+
+% bookmarks: as pdfoutline uses () currently only utf16 with BE is usable.
+% check if one can use HEX too when directly writing the object
+% ==========
+% uri: utf16BE/string seems not to work, hex neither
+%      utf8/string works but not on macos,
+%      so a specfic utf8/url variant is needed
+% ==========
+% "input" is utf8 for pdftex, empty (native) for unicode engine
+% commands to output literal strings  (...)
+
+\cs_new_protected:cpn { @@_string_from_unicode_utf8/string-raw:nN }  #1 #2
+  {
+     \str_set_convert:Nnnn #2
+        { #1 }
+        { default }
+        {utf8/string}
+  }
+
+\cs_new_protected:cpn { @@_string_from_unicode_utf8/string:nN } #1 #2
+  {
+    \use:c { @@_string_from_unicode_utf8/string-raw:nN } { #1 } #2
+    \str_put_left:Nn #2  {(}
+    \str_put_right:Nn #2 {)}
+  }
+% special url command:
+\cs_new_protected:cpx { @@_string_from_unicode_utf8/URI-raw:nN }  #1 #2
+  {
+     \exp_not:N \str_set_convert:Nnnn #2
+       { #1 }
+       { default }
+       {utf8/url}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 3A} {:}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 2F} {/}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 23} {\c_hash_str}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 5B} {[}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 5D} {]}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 40} {\c_atsign_str}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 21} {!}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 24} {\c_dollar_str}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 26} {\c_ampersand_str}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 27} {'}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 2A} {*}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 2B} {+}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 2C} {,}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 3B} {;}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 3D} {=}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 30} {0}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 31} {1}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 32} {2}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 33} {3}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 34} {4}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 35} {5}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 36} {6}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 37} {7}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 38} {8}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 39} {9}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 28} {\c_backslash_str(}
+     \exp_not:N \str_replace_all:Nnn #2 {\c_percent_str 29} {\c_backslash_str)}
+  }
+
+\cs_new_protected:cpn { @@_string_from_unicode_utf8/URI:nN } #1 #2
+  {
+     \use:c { @@_string_from_unicode_utf8/URI-raw:nN } {#1} #2
+     \str_put_left:Nn #2  {(}
+     \str_put_right:Nn #2 {)}
+  }
+% with utf16 with BE marker
+\cs_new_protected:cpn { @@_string_from_unicode_utf16/string-raw:nN }  #1 #2
+  {
+    \str_set_convert:Nnnn #2
+      { #1 }
+      { default }
+      {utf16/string}
+  }
+
+\cs_new_protected:cpn { @@_string_from_unicode_utf16/string:nN } #1 #2
+  {
+    \use:c { @@_string_from_unicode_utf16/string-raw:nN } {#1} #2
+    \str_put_left:Nn #2  {(}
+    \str_put_right:Nn #2 {)}
+  }
+
+\cs_new_protected:cpn { @@_string_from_unicode_utf16/hex-raw:nN } #1 #2
+  {
+     \str_set_convert:Nnnn #2
+       { #1 }
+       { default }
+       {utf16/hex}
+  }
+
+\cs_new_protected:cpn { @@_string_from_unicode_utf16/hex:nN } #1 #2
+  {
+    \use:c { @@_string_from_unicode_utf16/hex-raw:nN } {#1} #2
+    \str_put_left:Nn #2  {<}
+    \str_put_right:Nn #2 {>}
+  }
+
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \subsubsection{BDC  operator commands}
+% \begin{macro}{\pdf_bdc:nn}
+% \begin{macro}{\pdf_bdcobject:nn}
+% \begin{macro}{\pdf_bdcobject:n}
+% \begin{macro}{\pdf_bmc:n}
+% \begin{macro}{\pdf_emc:}
+%    \begin{macrocode}
+\cs_new_protected:Npn  \pdf_bdc:nn #1 #2 { \@@_backend_bdc:nn { #1 }{ #2 } }
+\cs_new_protected:Npn  \pdf_bdcobject:nn #1 #2 { \@@_backend_bdcobject:nn { #1 }{ #2 } }
+\cs_new_protected:Npn  \pdf_bdcobject:n #1     { \@@_backend_bdcobject:n  { #1 } }
+\cs_new_protected:Npn  \pdf_bmc:n #1     { \@@_backend_bmc:n  { #1 } }
+\cs_new_protected:Npn  \pdf_emc:         { \@@_backend_emc: }
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfxform.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfxform.dtx
new file mode 100644
index 00000000000..ec9afe865db
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/l3pdfxform.dtx
@@ -0,0 +1,204 @@
+% \iffalse meta-comment
+%
+%% File: l3pdfxform.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=l3pdfxform (LaTeX PDF management testphase bundle)}
+
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \title{^^A
+%   The \pkg{l3pdfxform} module\\ Commands for form XObjects   ^^A
+%   \\ \LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{l3pdfxform} documentation}
+% This module contains a number of commands to create \enquote{form XObjects},
+% for which pdf\TeX{} introduced the short name \enquote{xforms}.
+%
+% The status is still beta, so the style itself is currently named
+% \pkg{l3pdfxform-beta}. Missing is for example code for the dvips route.
+% Probably some of the function will also need to be enhanced by hooks.
+%
+%  \begin{function}[added = 2019-08-05,updated=2021-02-14]
+%   {
+%     \pdfxform_new:nnn
+%   }
+%   \begin{syntax}
+%     \cs{pdfxform_new:nnn} \Arg{name} \Arg{attributes} \Arg{content}
+%   \end{syntax}
+%    This command create a new form XObject that can be used as appearance or
+%    directly later.
+%    If the \meta{content} contains BDC-marks it should \emph{not} be given as a
+%    previously typeset box, but directly so that the names of the
+%    BDC-marks can be added to the resources of the xform. The xform will automatically
+%    include the resources of the current page.
+%    The content will be typeset in a hbox. With pdflatex and luatex
+%    the surrounding color is \emph{not} stored in the form XObject
+%    but should be if wanted added e.g. with |\color_select:n{.}|. This keeps
+%    the option of color injection open.
+%   \end{function}
+%   \begin{function}[added = 2019-08-05]
+%     {
+%      \pdfxform_use:n
+%     }
+%   \begin{syntax}
+%     \cs{pdfxform_use:n} \Arg{name}
+%   \end{syntax}
+%    This command uses (typesets) a previously created form XObject.
+%    If the surrounding color is different, it is injected in the form XObject with the
+%    engines pdftex or luatex.
+%   \end{function}
+%   \begin{function}[EXP,added = 2019-08-05]
+%     {
+%       \pdfxform_ref:n
+%     }
+%   \begin{syntax}
+%     \cs{pdfxform_ref:n} \Arg{name}
+%   \end{syntax}
+%   Inserts the appropriate information to reference the xform \meta{name}
+%   in for example appearance dictionaries.
+%   \end{function}
+%   \begin{function}[EXP,added = 2019-08-05]
+%     {
+%       \pdfxform_wd:n, \pdfxform_ht:n, \pdfxform_dp:n
+%     }
+%   \begin{syntax}
+%     \cs{pdfxform_wd:n} \Arg{name}
+%   \end{syntax}
+%    These command give back the sizes of the form XObject. The values are stored in
+%    tl-variables with the unit pt and not in dimensions!
+%   \end{function}
+%   \begin{function}[EXP,pTF,added = 2020-04-29]
+%     {
+%       \pdfxform_if_exist:n
+%     }
+%   \begin{syntax}
+%     \cs{pdfxform_if_exist_p:n} \Arg{name}
+%     \cs{pdfxform_if_exist:NTF} \meta{name} \Arg{true code} \Arg{false code}
+%   \end{syntax}
+%    These command tests if an xform with name \Arg{name} has been already defined.
+%   \end{function}%
+% \end{documentation}
+%
+% \begin{implementation}
+%
+% \section{\pkg{l3pdfxform} implementation}
+%
+%    \begin{macrocode}
+%<@@=pdf>
+%<*header>
+\ProvidesExplPackage {l3pdfxform-beta} {2021-02-22} {0.95a}
+  {command to create xforms (beta)---LaTeX PDF management testphase bundle}
+%</header>
+%    \end{macrocode}
+% \subsection{Form XObject (pdfxform)}
+% \begin{NOTE}{UF}
+%  - As in dvi mode the xform is immediate, this is done for pdftex/luatex too.
+%    If needed a delayed version can be added later.
+%  - the argument for attributes is needed to add e.g. /StructParents
+%  - it is not clear if an argument for additional resources is needed, probably they
+%    should / need to be added automatically.
+%  - code for adding ExtGState etc to the local resource is missing, will be
+%    added when the object name is clear.
+%  - should the size be stored in dim or tl?
+%  - dvips implementation is missing for ideas: pdfbase, atfi-dvips.def,
+%  \end{NOTE}
+% \begin{macro}{\pdfxform_new:nnn}
+%    \begin{macrocode}
+%<*package>
+\cs_new_protected:Npn  \pdfxform_new:nnn #1 #2 #3
+  {
+    \@@_backend_xform_new:nnnn { #1 } { #2 } {  } { #3 }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\pdfxform_use:n}
+%    \begin{macrocode}
+\cs_new_protected:Npn \pdfxform_use:n #1
+  {
+    \@@_backend_xform_use:n { #1 }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\pdfxform_ref:n,\pdfxform_ref:o}
+%    \begin{macrocode}
+% expansion?
+\cs_new:Npn \pdfxform_ref:n #1
+  {
+    \@@_backend_xform_ref:n { #1 }
+  }
+
+\cs_generate_variant:Nn \pdfxform_ref:n {o}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\pdfxform_wd:n,\pdfxform_ht:n,\pdfxform_dp:n,}
+%    \begin{macrocode}
+\cs_new:Npn \pdfxform_wd:n #1
+  {
+    \tl_use:c { c_@@_backend_xform_wd_ \tl_to_str:n { #1 } _tl }
+  }
+
+\cs_new:Npn \pdfxform_ht:n #1
+  {
+    \tl_use:c { c_@@_backend_xform_ht_ \tl_to_str:n { #1 } _tl }
+  }
+
+\cs_new:Npn \pdfxform_dp:n #1
+  {
+    \tl_use:c { c_@@_backend_xform_dp_ \tl_to_str:n { #1 } _tl }
+  }
+%    \end{macrocode}
+% \end{macro}
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/ltdocinit.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/ltdocinit.dtx
new file mode 100644
index 00000000000..f37514d936c
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/ltdocinit.dtx
@@ -0,0 +1,354 @@
+% \iffalse meta-comment
+%
+%% File: ltdocinit.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=ltdocinit (LaTeX PDF management testphase bundle)}
+
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \title{^^A
+%   The \pkg{ltdocinit} module
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{ltdocinit} documentation}
+% This small module defines \cs{DeclareDocumentMetadata} and the related keys.
+% It also defines commands to store document properties in a global container.
+%
+% \subsection{\cs{DeclareDocumentMetadata}}
+%
+% \begin{function}{\DeclareDocumentMetadata}
+% \begin{syntax}
+%  \cs{DeclareDocumentMetadata}\Arg{key-value list}
+% \end{syntax}
+% \end{function}
+%
+% Currently there is no dedicated location to declare settings concerning
+% a document as a whole. Settings are placed somewhere in the preamble or
+% with the class options or even with some package options.
+% For some settings this can be too late,
+% for example the pdf version can no longer be changed if a
+% package has used code which already opened the PDF.
+%
+% \cs{DeclareDocumentMetadata} as a new command
+% should unify such settings in one place.
+% It should be used before \cs{documentclass}, directly after
+% loading \pkg{pdfmanagement-testphase}. \cs{DeclareDocumentMetadata}
+% can be used more than once.
+%
+% The keys defined for \cs{DeclareDocumentMetadata}
+% currently allows to set the PDF version, to set the PDF \texttt{/Lang},
+% to uncompress a pdf, to set the language and to declare a few PDF standards
+% and some colorprofiles.
+%
+% \cs{DeclareDocumentMetadata} is also used to
+% activate the new PDF management code and it loads
+% a number of required files for the PDF management code.
+% As this forces the loading of the backend files, a backend
+% which can't be detected automatically like |dvipdfmx|,
+% must be set in the first \cs{DeclareDocumentMetadata}.
+%
+% Currently the following keys are implemented
+%
+% \begin{description}
+%    \item[\texttt{backend}] passes the backend name to expl3.
+%    This will probably be extended to  pass the value also to packages.
+%    \item[\texttt{pdfversion}] e.g. \texttt{pdfversion=1.7}
+%    \item[\texttt{uncompress}] no value. Forces an uncompressed pdf.
+%    \item[\texttt{lang}] to set the Lang entry in the Catalog.
+%    E.g. \texttt{lang=de-DE}. The initial value is |en-US|
+%    \item[\texttt{pdfstandard}] Choice key to set the pdf standard.
+%      Currently |A-1b|, |A-2b| and |A-3b| are accepted as
+%      values. The underlying code to ensure the requirements (as far as they
+%      can be ensured) is incomplete, but a color profile is included and the
+%      /OutputIntent is set. More information can be found in the documentation
+%      of \pkg{l3pdfmeta}.
+%    \item[\texttt{colorprofiles}] This allows to load icc-colorprofiles. Details
+%    are described in the documentation of \pkg{l3pdfmeta}.
+%    \item[\texttt{pdfmanagement}] Boolean. This activates/deactivates
+%      the core management code. By default the value is true.
+%    \item[firstaidoff] This accepts a comma lists of keysword and disable the patches
+%    related to them. More information can be found in the documentation of
+%    \pkg{pdfmanagement-firstaid}.
+% \end{description}
+%
+% \subsection{Container for document properties}
+%
+% The module provides a container where classes, packages and users can store
+% properties of the document which are perhaps of interest
+% or use for other packages or the author.
+%
+% The properties are stored with a key |label/property|. The values can be
+% retrieved expandably.
+%
+% \begin{function}{\AddToDocumentProperties}
+% \begin{syntax}
+%  \cs{AddToDocumentProperties}\oarg{label}\Arg{property}\Arg{value}
+% \end{syntax}
+% This stores \meta{value} under the key \meta{label}/\meta{property}.
+% By default \meta{label} is the current package name |\@currname|. If another
+% label is choosen, it should be one which avoids clashes with other packages
+% using the container. The label |document| is reserved.
+% \end{function}
+%
+% \begin{function}{\GetDocumentProperties}
+% \begin{syntax}
+%  \cs{AddToDocumentProperties}\Arg{label/property}
+% \end{syntax}
+% Expands to the \meta{value} corresponding to \meta{label/property}
+% in the container. If \meta{label/property} is missing,
+% this has an empty expansion.
+% The result is returned within \cs{exp_not:n}, which means
+% that the \meta{value} does not expand further
+% when appearing in an x-type argument expansion.
+% \end{function}
+%
+% \begin{function}{\ShowDocumentProperties}
+% \begin{syntax}
+%  \cs{ShowDocumentProperties}
+% \end{syntax}
+% This show the current content of the container.
+% \end{function}
+%
+% \end{documentation}
+%
+% \begin{implementation}
+%
+% \section{\pkg{ltdocinit} implementation}
+% \subsection{\cs{DeclareDocumentMetadata}}
+%    \begin{macrocode}
+%<@@=pdfmanagement>
+%<*header>
+\ProvidesExplPackage {ltdocinit} {2021-02-22} {0.95a}
+  {Initialize document metadata}
+%</header>
+%    \end{macrocode}
+% \cs{DeclareDocumentMetadata} should for now not be used after
+% \cs{documentclass} so we error in this case. It can be used more than once
+% but follow-up calls should not do the initialization code.
+%    \begin{macrocode}
+%<*package>
+\msg_new:nnn  { document } { setup-after-documentclass }
+              {
+                \token_to_str:N \DeclareDocumentMetadata \c_space_tl
+                should~be~used~only~before~\token_to_str:N\documentclass
+              }
+%    \end{macrocode}
+% \begin{macro}{\DeclareDocumentMetadata}
+%    \begin{macrocode}
+\NewDocumentCommand\DeclareDocumentMetadata { m }
+  {
+    \cs_if_eq:NNTF \documentclass \@twoclasseserror
+      { \msg_error:nn { document }{ setup-after-documentclass } }
+      {
+%    \end{macrocode}
+% The wanted backend must be detected first, we read the init key and then
+% force the loading by either loading l3pdf (+ expl3) or only expl3.
+%    \begin{macrocode}
+        \keys_set_groups:nnn { document / metadata} {init}{ #1 }
+        %should be loaded after the backend is set, and only if not in the kernel
+        \cs_if_free:NTF \pdf_uncompress:
+         {\RequirePackage{l3pdf}}{\RequirePackage{expl3}}
+%    \end{macrocode}
+% Now we load the extra backend code and set the boolean to true
+%    \begin{macrocode}
+        \ExplSyntaxOn\makeatletter
+          \file_input:n {l3backend-testphase-\c_sys_backend_str.def}
+        \ExplSyntaxOff\makeatother
+        \bool_gset_true:N \g_@@_active_bool
+%    \end{macrocode}
+% set the default language, process the rest of the keys,
+% and setup the generic driver
+%    \begin{macrocode}
+        \keys_set_filter:nnn  { document / metadata } { init } { lang=en-US, #1 }
+        \bool_if:NT \g_@@_active_bool
+          {
+            \PassOptionsToPackage{customdriver=hgeneric-testphase}{hyperref}
+          }
+%    \end{macrocode}
+% \cs{pdfmanagement_add:nnn} has collected values in this hook.
+%    \begin{macrocode}
+        \hook_use_once:n {pdfmanagement/add}
+%    \end{macrocode}
+% Redefine \cs{DeclareDocumentMetadata} so that it only process the keys.
+% We need to update the hyperref option if the active status changes.
+%    \begin{macrocode}
+        \RenewDocumentCommand\DeclareDocumentMetadata { m }
+          {
+            \keys_set_filter:nnn  { document / metadata } { init } { ##1 }
+            \bool_if:NTF \g_@@_active_bool
+             {
+               \str_remove_all:cn {opt@hyperref.sty}{customdriver=hgeneric-testphase}
+               \PassOptionsToPackage{customdriver=hgeneric-testphase}{hyperref}
+             }
+             {
+               \str_remove_all:cn {opt@hyperref.sty}{customdriver=hgeneric-testphase}
+             }
+          }
+%    \end{macrocode}
+% Load more modules and the firstaid code.
+%    \begin{macrocode}
+        \RequirePackage{pdfmanagement-firstaid}
+      }
+  }
+%    \end{macrocode}
+% \end{macro}
+% \subsection{Container for document Properties}
+% The container for the document properties is a prop
+% \begin{variable}{\g_@@_documentproperties_prop}
+%    \begin{macrocode}
+\prop_new:N \g_@@_documentproperties_prop %
+%    \end{macrocode}
+% \end{variable}
+% \begin{macro}{\AddToDocumentProperties}
+%    \begin{macrocode}
+\NewDocumentCommand\AddToDocumentProperties{O{\@currname}mm}
+  {
+    \exp_args:NNx
+      \prop_gput:Nnn \g_@@_documentproperties_prop
+        {
+          \tl_if_blank:eTF {#1}{top-level/}{#1/} #2
+        }
+        { #3}
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\GetDocumentProperties}
+%    \begin{macrocode}
+\NewExpandableDocumentCommand\GetDocumentProperties{m}
+  {
+    \prop_item:Nn \g_@@_documentproperties_prop {#1}
+  }
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\ShowDocumentProperties}
+%    \begin{macrocode}
+\msg_new:nnn  { pdfmanagement } { show-properties }
+  {
+    The~following~document~properties~have~been~stored:
+    #1
+  }
+\NewDocumentCommand\ShowDocumentProperties {}
+  {
+    \msg_show:nnx {pdfmanagement}{show-properties}
+      {
+        \prop_map_function:NN \g_@@_documentproperties_prop \msg_show_item:nn
+      }
+  }
+%    \end{macrocode}
+% \end{macro}
+%  \subsection{The keys for \cs{DeclareDocumentMetadata}}
+%  As they use \cs{AddToDocumentProperties} they have to come after
+%  it has been defined.
+%
+%  \begin{variable}{\g_@@_firstaidoff_clist}
+%  A list to store the firstaid code which should be disabled
+%    \begin{macrocode}
+\clist_new:N \g_@@_firstaidoff_clist
+%    \end{macrocode}
+% \end{variable}
+%    \begin{macrocode}
+\keys_define:nn { document / metadata }
+  {
+    backend .code:n =
+      {
+        \PassOptionsToPackage { driver=#1 } {expl3}
+        \AddToDocumentProperties[document]{backend}{#1}
+      },
+    backend .groups:n = { init } ,
+  }
+
+\keys_define:nn { document / metadata }
+  {
+    ,pdfversion .code:n =
+      {
+        \pdf_version_gset:n { #1 }
+        \AddToDocumentProperties[document]{pdfversion}{#1}
+      }
+    ,uncompress .code:n =
+      {
+        \pdf_uncompress:
+      }
+    ,uncompress .value_forbidden:n = true
+    ,lang .code:n =
+      {
+        \pdfmanagement_add:nnn {Catalog} {Lang}{(#1)}
+        \AddToDocumentProperties[document]{lang}{#1}
+      }
+    %,xmpmeta .bool_gset:N = \g_pdfmeta_xmp_bool %see pdfmeta unused and undefined for now!
+    % this uses internal command from pdfmeta, it should probably move there ...
+    ,pdfstandard .code:n =
+      {
+        \exp_args:Nnx
+        \keys_set:nn {document / metadata} {_pdfstandard=\str_uppercase:n{#1}}
+      }
+    ,_pdfstandard .choices:nn =
+      {A-1B,A-2B,A-3B}
+      {
+        \prop_if_exist:cT { g__pdfmeta_standard_pdf/#1_prop }
+          {
+            \prop_gset_eq:Nc \g__pdfmeta_standard_prop { g__pdfmeta_standard_pdf/#1 _prop }
+          }
+        \AddToDocumentProperties [document]{pdfstandard}{#1}
+      }
+    ,_pdfstandard / unknown .code:n =
+      {
+        \msg_warning:nnn{pdf}{unknown-standard}{#1}
+      }
+    ,pdfmanagement .bool_gset:N = \g_@@_active_bool
+    ,pdfmanagement .initial:n =  {true}
+    ,firstaidoff .clist_gset:N = \g_@@_firstaidoff_clist
+  }
+%    \end{macrocode}
+%    \begin{macrocode}
+%</package>
+%    \end{macrocode}
+%
+% \end{implementation}
+%
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-firstaid.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-firstaid.dtx
new file mode 100644
index 00000000000..08fbf856db1
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-firstaid.dtx
@@ -0,0 +1,319 @@
+% \iffalse meta-comment
+%
+%% File: pdfmanagement-firstaid.dtx
+%
+% Copyright (C) 2018-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass[full]{l3doc}
+\usepackage{array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=pdfmanagement-firstaid
+  (LaTeX PDF management testphase bundle)}
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+% \title{^^A
+%   The \pkg{pdfmanagement-firstaid} package  -- temporary patches and package replacements  ^^A
+%   \\ \LaTeX{} PDF management testphase bundle
+% }
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+%
+% \section{\pkg{pdfmanagement-firstaid} documentation}
+% This code is temporary! It tries to patch commands of other packages or even
+% replace package which are incompatible with the pdfmanagement,
+% to remove clashes and test if everything works as expected.
+% This code should disappear when packages adapt to the central interfaces.
+%
+% The package contains an number of sections for various packages. Every
+% section can be disabled in (the first) \cs{DeclareDocumentMetadata} with
+% |firstaidoff={name1,name2,...}|.
+%    \begin{macrocode}
+%<*package>
+\ProvidesExplPackage {pdfmanagement-firstaid} {2021-02-22} {0.95a}
+  {LaTeX PDF management testphase bundle / firstaid-patches}
+
+%<@@=pdfmanagement>
+\clist_map_inline:nn {pgf,transparent,hyperxmp,pdflscape,xcolor,color}
+  {
+    \bool_new:c       { g_@@_firstaid_#1_bool }
+    \bool_gset_true:c { g_@@_firstaid_#1_bool }
+  }
+\clist_map_inline:Nn \g_@@_firstaidoff_clist
+  {
+    \bool_if_exist:cT { g_@@_firstaid_#1_bool }
+      {
+        \bool_gset_false:c { g_@@_firstaid_#1_bool }
+      }
+  }
+\msg_new:nnn  { pdfmanagement } { firstaid }
+              { loading~pdfmanagement~firstaid~code~for~#1 }
+%    \end{macrocode}
+% \subsection{\pkg{color}}
+%
+%  \pkg{color} is not incompatible, but the new \pkg{hyperref} driver makes use of
+%  \pkg{l3color} to set the colors. It is therefore necessary to patch some
+%  internal \pkg{color} commands, so
+%  that colors defined with its \cs{definecolor} command are known to \pkg{l3color} and
+%  so \pkg{hyperref}. This only supports the color models from l3color (which covers
+%  all standard model of the \pkg{color} package). The |named| model is mapped to
+%  \cs{color_set:nn}.
+%
+%  This patch serves also as test to check if this change can be safely
+%  added to \pkg{color} later.
+%    \begin{macrocode}
+\@ifundefined{color_set:nn}{
+\RequirePackage{l3color}}{}
+\bool_if:NT \g_@@_firstaid_color_bool
+  {
+    \declare@file@substitution{color.sty}{color-ltx.sty}
+  }
+%    \end{macrocode}
+%
+% \subsection{\pkg{xcolor}}
+%
+%  \pkg{xcolor} is not incompatible, but the new \pkg{hyperref} driver makes use of
+%  \pkg{l3color} to set the colors. It is therefore necessary to patch \pkg{xcolor}, so
+%  that colors defined with its \cs{definecolor} command are known to \pkg{l3color} and
+%  so \pkg{hyperref}. This only supports the color model from l3color. Colors defined
+%  with the models |cmy| and |tHsb| are silently ignored.
+%
+%  The |named| model is mapped to \cs{color_set:nn}.
+%
+%    \begin{macrocode}
+\@ifundefined{color_set:nn}{
+\RequirePackage{l3color}}{}
+\bool_if:NT \g_@@_firstaid_xcolor_bool
+  {
+    \AddToHook{package/after/xcolor}
+       {\RequirePackage{xcolor-patches-tmp-ltx}\XC@@@@names}
+  }
+%    \end{macrocode}
+% \subsection{\pkg{pgf}}
+%
+% In \pkg{pgf}, resource management is set up in the file |pgfutil-common.tex|.
+% This then provides three functions for adding to the resources, all of which
+% are objects:
+% \begin{itemize}
+%   \item \cs{pgfutil@addpdfresource@extgs}: Extended graphics state
+%   \item \cs{pgfutil@addpdfresource@colorspaces}: Color spaces
+%   \item \cs{pgfutil@addpdfresource@patterns}: Patterns
+% \end{itemize}
+%
+% These resource dictionaries are used by adding entries in a cumulative sense;
+% the macro layer deals with ensuring that each entry is only given once. Note
+% that the objects themselves must be given only once for each page.
+%
+% To support these functions, there are a series of set-up macros which install
+% these resources. That has to take place for every page: the exact route
+% therefore depends on the driver.
+%
+% For the pdfmanagement project we need to avoid that pgf interferes in ExtGState,
+% ColorSpace and Pattern (Shadings are added to the xform resources and so probably
+% unproblematic for now).
+% The actual patch is in a file hook guarded by the boolean,
+% the rest of the code is always defined.
+%    \begin{macrocode}
+
+\bool_if:NT \g_@@_firstaid_pgf_bool
+  {
+    \msg_info:nnn{pdfmanagement }{firstaid}{pgf}
+    \AddToHook{file/after/pgfrcs.sty}
+      {
+        \cs_set_eq:NN
+          \@@_pgfori_pgfutil@setuppdfresources
+          \pgfutil@setuppdfresources
+        \def\pgfutil@setuppdfresources
+          {
+            \pdfmanagement_if_active:TF
+              {
+                \@@_pgf_sys_setuppdfresources_plain:
+              }
+              {
+                \@@_pgfori_pgfutil@setuppdfresources
+              }
+         }
+     }
+  }
+%\def\pgfutil@addpdfresource@extgs#1{\pgf@sys@addpdfresource@extgs@plain{#1}}
+%\def\pgfutil@addpdfresource@colorspaces#1{\pgf@sys@addpdfresource@colorspaces@plain{#1}}
+%\def\pgfutil@addpdfresource@patterns#1{\pgf@sys@addpdfresource@patterns@plain{#1}}
+%\def\pgfutil@setuppdfresources{\pgf@sys@setuppdfresources@plain}
+% \pgf@sys@pdf@possible@resources %used in xform
+%Trying to patch pgf ..
+\cs_new_protected:Npn \@@_pgf_sys_setuppdfresources_plain:
+  {
+   %objects are already created ...
+    \def\pgf@sys@pdf@possible@resources
+      {
+        /ColorSpace~\pdf_object_ref:n {Page/Resources/ColorSpace}
+        /Pattern   ~\pdf_object_ref:n {Page/Resources/Pattern}
+        /ExtGState ~\pdf_object_ref:n {Page/Resources/ExtGState}
+      }
+    \let\pgf@sys@pdf@check@resources=\relax%
+    %not sure if needed, but perhaps the lists are used somewhere else ...
+    \let\pgf@sys@pgf@resource@list@extgs=\pgfutil@empty%
+    \let\pgf@sys@pgf@resource@list@patterns=\pgfutil@empty%
+    \let\pgf@sys@pgf@resource@list@colorspaces=\pgfutil@empty%
+    % the commands to add page resources
+    \def\pgf@sys@addpdfresource@extgs@plain##1
+      {
+        \exp_after:wN %for transparent which passes a command
+          \@@_patch_pgfextgs:w ##1\q_stop
+      }
+    \def\pgf@sys@addpdfresource@patterns@plain##1
+      {
+        \@@_patch_pgfpatterns:w ##1\q_stop
+      }
+   \def\pgf@sys@addpdfresource@colorspaces@plain##1
+      {
+        \@@_patch_pgfcolorspaces:w ##1\q_stop
+      }
+  }
+
+%\AtEndPreamble{\pgfutil@setuppdfresources}
+% helper commands as pgf doesn't pass resources as two arguments
+% code to add to the resources existing stuff in the format "/name value":
+\cs_new:Npn \@@_split_dict_entry_aux:NNw #1 #2 /#3~#4\q_stop
+  {
+    \tl_set:Nn #1 {#3}
+    \tl_set:Nn #2 {#4}
+  }
+
+\cs_new:Npn \@@_patch_pgfextgs:w  #1/#2<<#3>>#4\q_stop
+  {
+    \exp_args:Nne
+      \__pdf_backend_PageResources_gput:nnn
+        {ExtGState}{\tl_trim_spaces:n{#2}}{<<#3>>}
+  }
+\cs_new:Npn \@@_patch_pgfpatterns:w  #1/#2\space#3\q_stop
+  {
+    \exp_args:Nnxx
+      \__pdf_backend_PageResources_gput:nnn
+        {Pattern}{\tl_trim_spaces:n{#2}}{#3}
+  }
+\cs_new:Npn \@@_patch_pgfcolorspaces:w  #1/#2[#3]#4\q_stop
+  {
+    \exp_args:Nne
+    \__pdf_backend_PageResources_gput:nnn
+      {ColorSpace}{\tl_trim_spaces:n{#2}}{[#3]}
+  }
+
+%    \end{macrocode}
+% \subsection{\pkg{transparent}}
+% We simply replace by the new version.
+%    \begin{macrocode}
+\bool_if:NT \g_@@_firstaid_transparent_bool
+ {
+   \declare@file@substitution{transparent.sty}{transparent-ltx.sty}
+ }
+%    \end{macrocode}
+% \subsection{\pkg{pdflscape}}
+% We simply replace by the new version.
+%    \begin{macrocode}
+\bool_if:NT \g_@@_firstaid_pdflscape_bool
+ {
+   \declare@file@substitution{pdflscape.sty}{pdflscape-ltx.sty}
+ }
+%    \end{macrocode}
+% \subsection{hyperxmp}
+% We add some code at the end of hyperxmp.sty.
+%    \begin{macrocode}
+\bool_if:NT \g_@@_firstaid_hyperxmp_bool
+ {
+    \AddToHook
+      {file/after/hyperxmp.sty}
+      {\RequirePackage{hyperxmp-patches-tmp-ltx}}
+ }
+%</package>
+%    \end{macrocode}
+% \subsection{\pkg{colorspace}}
+% This is rather difficult as no real places to inject patches
+% at first a try to avoid that its ExtGState is missing:
+% it can not be avoided to recreate the objects (and so to get duplicates)
+% as colorspace uses temporary macros whose contents is lost.
+%    \begin{macrocode}
+%<*package>
+%<@@=pdf>
+% this must be earlier, to avoid problems with luatex which has two pageresources
+% lua/tex
+\hook_gput_code:nnn {begindocument} {pdf}
+  {
+    \tl_if_exist:NT \spc@op
+      {
+        \def\spc@Pageresources#1{}
+      }
+
+  }
+
+\hook_gput_code:nnn {begindocument/end} {pdf}
+  {
+    \tl_if_exist:NT \spc@op
+      {
+        \@@_backend_object_new:nn  {__spc_extgstate_op_false}{dict}
+        \@@_backend_object_write:nn
+          {__spc_extgstate_op_false}
+          {/Type /ExtGState~/op~false~/OP~false}
+        \pdfmanagement_add:nnn
+          {Page/Resources/ExtGState}
+          {SPCko}
+          {\@@_backend_object_ref:n {__spc_extgstate_op_false}}
+        \@@_backend_object_new:nn  {__spc_extgstate_op_true0}{dict}
+        \@@_backend_object_write:nn
+          {__spc_extgstate_op_true0}
+          {/Type /ExtGState~/op~true~/OP~true~/OPM~0}%
+        \pdfmanagement_add:nnn
+          {Page/Resources/ExtGState}
+          {SPCmz}
+          {\@@_backend_object_ref:n {__spc_extgstate_op_true0}}
+        \@@_backend_object_new:nn  {__spc_extgstate_op_true1}{dict}
+        \@@_backend_object_write:nn
+          {__spc_extgstate_op_true1}
+          {/Type /ExtGState~/op~true~/OP~true~/OPM~1}%
+         \pdfmanagement_add:nnn
+          {Page/Resources/ExtGState}
+          {SPCop}
+          {\@@_backend_object_ref:n {__spc_extgstate_op_true1}}
+      }
+  }
+%</package>
+%    \end{macrocode}%
+% \end{documentation}
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-testphase.dtx b/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-testphase.dtx
new file mode 100644
index 00000000000..4b63544d179
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-testphase.dtx
@@ -0,0 +1,429 @@
+% \iffalse meta-comment
+%
+%% File: pdfmanagement-testphase.dtx
+%
+% Copyright (C) 2019-2021 The LaTeX Project
+%
+% It may be distributed and/or modified under the conditions of the
+% LaTeX Project Public License (LPPL), either version 1.3c of this
+% license or (at your option) any later version.  The latest version
+% of this license is in the file
+%
+%    https://www.latex-project.org/lppl.txt
+%
+% This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+% and all files in that bundle must be distributed together.
+%
+% -----------------------------------------------------------------------
+%
+% The development version of the bundle can be found at
+%
+%    https://github.com/latex3/pdfresources
+%
+% for those people who are interested.
+%
+%<*driver>
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{pdfstandard=A-2b}
+\makeatletter
+\declare@file@substitution{doc.sty}{doc-v3beta.sty}
+\makeatother
+\documentclass{l3doc}
+\usepackage{tabularx,array,booktabs,hyperxmp}
+\hypersetup{pdfauthor=The LaTeX Project,pdftitle=LaTeX PDF management testphase bundle}
+\newcommand\potentialclash{\noindent\llap{\dbend\ }}
+\raggedbottom
+\begin{document}
+  \DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+%
+% \title{The \LaTeX{} PDF management testphase bundle}
+%
+% \author{^^A
+%  The \LaTeX{} Project\thanks
+%    {^^A
+%      E-mail:
+%        \href{mailto:latex-team@latex-project.org}
+%          {latex-team@latex-project.org}^^A
+%    }^^A
+% }
+%
+% \date{Version 0.95a, released 2021-02-22}
+%
+% \maketitle
+% \begin{documentation}
+% \section*{Abstract}
+%  {\em This is a temporary package created to allow the manual
+%   loading of the new \LaTeX{} PDF management code during a test phase.
+%  It will disappear when the code is integrated into the \LaTeX{} format.}
+%
+%  \medskip
+%  \noindent During the test phase the package should be used like this:
+%
+% \begin{verbatim}
+% \RequirePackage{pdfmanagement-testphase}   % load the package
+%
+% \DeclareDocumentMetadata      % activate the PDF management (with options)
+%     {
+%       % options
+%     }
+%
+%  \documentclass {...}
+% \end{verbatim}
+%  Note that the activation has to happen before the \cs{documentclass} declaration.
+%  Because of this, the package needs loading with \cs{RequirePackage}.
+%
+%
+%
+% \section*{Feedback wanted!}
+%
+% Bug reports and feedback are welcome. Please open an issue at
+% \url{https://github.com/latex3/pdfresources}.
+%
+% While the code targets PDF as output format, feedback about the
+% effect on other formats is needed too.
+%
+% \section{Introduction}
+% The \LaTeX{} format currently contains nearly no code specific to the now quite
+% central output format, PDF. It also offers nearly no interfaces to important PDF related
+% primitive commands for package writers.
+%
+% Important tasks like supporting PDF standards,
+% creating links, adding special colors, managing the content of
+% central PDF-directories or even simple tasks like setting the PDF version
+% are delegated to external packages which have to recourse to
+% the primitive low-level commands in their code.
+%
+% This is problematic for three reasons:
+% \begin{itemize}
+%\item At first using primitives directly can lead to clashes and duplicate
+% settings with conflicting values---nothing prevent packages to add for example
+% the \texttt{/Title} twice to the Info dictionary, the \texttt{/Lang} entry
+% twice to the Catalog, or to add two \texttt{/ExtGState}
+% resources to a page. The PDF normally doesn't break in such
+% cases---the format is quite robust---but it will ignore one of the duplicates and
+% the output can be wrong.
+%
+% \item At second the primitives differ between the various engines and backends with
+% which \LaTeX{} is used. To support the engines and backend
+% packages have to write and maintain
+% \enquote{driver} files which they did to a varying degree. This makes it
+% difficult for users to assess if a package will work with their work-flow and
+% is a strain for package writers as they have to keep track of engine and backend changes.
+%
+% \item And at last generic hooks and configuration points to various
+% PDF related structures are missing and difficult to add.
+% \end{itemize}
+%
+% Despite the potential problems, until now the number of conflicts were
+% small and could be resolved in an ad-hoc fashion. But the future plans for
+% \LaTeX{} regarding support for tagged PDF and
+% PDF standards mean that much more PDF specific code will have to be
+% written by the kernel directly and this can not be done without proper,
+% well-defined and well-behaving interfaces and hooks.
+%
+% Some first steps for better support of PDF related commands have been already done
+% with the \pkg{l3pdf} package which has now been integrated into \pkg{l3kernel}.
+% It offers backend independent commands to create
+% PDF objects and destination, to set the compress level and the PDF version.
+%
+% The PDF management bundle extends this to more PDF related areas
+% and provides interfaces to them in a backend independent way.
+%
+% The new PDF management has three main objectives
+% connected with the problems identified above:
+% \begin{itemize}
+% \item For commands with \enquote{clash potential} it implements commands to
+% replace the primitives and so to resolve potential conflicts.
+%
+% \item It implements commands for a variety of PDF related tasks
+% and supports a well-defined set of backends.
+%
+% \item If sensible this commands are enhanced by hooks from the new
+% \LaTeX{} hook system. This has been e.g.\ done for annotations in the
+% \pkg{l3pdfannot} bundle.
+% \end{itemize}
+%
+% \section{\enquote{Change Strategy}: The integration into \LaTeX\label{sec:change}}
+%
+% The central module of this bundle, \pkg{l3pdfmanagement}, defines an interface
+% for the (pdf\TeX) primitives \cs{pdfcatalog}, \cs{pdfinfo},
+% \cs{pdfpagesattr}, \cs{pdfpagesattr} and \cs{pdfpageresources} and
+% the analog commands from the other engines and backends.
+%
+% All these commands have a \enquote{clash potential}, this means that the new
+% interface is incompatible with a parallel use of the primitive commands
+% which it targets to replace and supersede.
+% This doesn't affect many packages, but the list of package using such primitives
+% contains central and important packages like \pkg{hyperref}, \pkg{tikz},
+% \pkg{pdfx} and more.
+%
+% So while the goal is to integrate the code into the \LaTeX{} format directly,
+% this can not be done immediately without conflicts with existing documents and packages.
+%
+% As an intermediary step the package \pkg{pdfmanagement-testphase} has been
+% created which loads the code manually.
+% With it package authors and users can test the new code, give feedback
+% and packages can be adapted.
+%
+% Loading the package will only \emph{load} the modules,
+% to \emph{activate} the core PDF management the trigger command
+% \cs{DeclareDocumentMetadata} has to be used too.
+% The loading and activation has to be done
+% \emph{before} the \cs{documentclass} command.
+%
+%
+% We hope that this setup will allow packages writers and users to test the
+% PDF management code and adapt packages and documents safely.
+%
+%
+% \section{Backend support}
+% The supported backends are pdflatex, lualatex, (x)dvipdfmx (latex, xelatex,
+% dvilualatex (in texlive 2021))
+% and dvips with ps2pdf (not completely yet). dvips with distiller could work too
+% but is untested.
+%
+% That the interfaces and commands are backend independent doesn't mean
+% that the results and even the compilation behavior is identical.
+% The backends are too different to allow this.
+% Some backends expand arguments e.g. in a \cs{special} while other don't.
+% Some backends can insert a resource at the first compilation, while another uses
+% the aux-file and a label and so needs at least two compilation runs.
+% Some backends manage some of the resources through side-effects,
+% some manage them automatically.
+% All this mean that package writers will still have to keep an eye on
+% backend requirements and run tests for all variants. Also backend specific code
+% will still be needed in some cases.
+%
+% \section{Use}\label{sec:use}
+% The package should be loaded before \cs{documentclass}. To activate
+% the resource management it should be followed by
+% \cs{DeclareDocumentMetadata}\marg{key-val}.
+% The options of \cs{DeclareDocumentMetadata} are described in the documentation of
+% \pkg{ltdocinit}.
+%
+% \begin{verbatim}
+% \RequirePackage{pdfmanagement-testphase} % load the package
+% \DeclareDocumentMetadata % activates the PDF management interface
+%     {
+%        %options
+%     }
+% \documentclass {...}
+% \end{verbatim}
+%
+% The PDF management can be deactivated either setting the key
+% \texttt{pdfmanagement} to \texttt{false} or by commenting out
+% the whole \cs{DeclareDocumentMetadata} declaration.
+%
+% To test if the PDF management is active the predicate
+% \cs{pdfmanagement_if_active:TF} can be used, see the documentation of \pkg{l3pdfmanagement}.
+%
+% \section{Requirements}
+% The new PDF management requires a \LaTeX{} format from 2020/10/01 or later
+% and an L3 programming layer of 2021-02-18 or later.
+% It currently depends on the experimental packages \pkg{l3ref-tmp} and \pkg{l3bitset}.
+% In some places, e.g. when writing strings to the pdf it assumes that
+% the file is utf8 encoded -- ascii will naturally work too, but legacy 8bit encodings are
+% not supported.
+%
+% \section{Modules}
+% The bundle contains a number of modules. The majority of the modules don't
+% have a stand alone \texttt{sty}, their code is combined
+% in one file and loaded by the main package. The organization and naming is bound
+% to change over time: For almost all modules the goal is to
+% integrate them into the format and the individual files to disappear.
+%
+% The description items give the name of the documentation
+% of the modules. There doesn't exist in all cases a related |.sty|.
+%
+% \begin{description}
+% \item[l3pdfdict] This module provides commands for PDF dictionaries. Its main
+% purpose is to create name spaces. The code used e.g. by \pkg{l3pdfmanagement} and
+% \pkg{l3pdfannot}.
+%
+% \item[l3pdfannot] This module provides commands for annotations. Currently mainly
+% link annotations, widget annotations will be added later. It doesn't require
+% the PDF management to be active.
+%
+% \item[l3pdfmanagement] This is the core code of the PDF management.
+%
+% \item[ltdocinit] This module provides the \cs{DeclareDocumentMetadata} command.
+%
+% \item[hyperref-generic] This module provides a new generic hyperref driver.
+% The driver will
+% be loaded automatically by hyperref if the PDF management code is active.
+%
+% \item[l3backend-testphase] This module contains backend code needed by the
+% PDF management. It will in due time be integrated into l3backend.
+%
+% \item[l3pdfmeta] This module contains code to handle PDF standards.
+% Currently it handles pdf/A and colorprofiles/outputintents.
+%
+% \item[l3pdfxform]  Commands for form XObjects (xforms).
+%
+% \item[l3pdf\/tool] A number of commands like text conversion commands and
+% bcd/emc.  The commands will at some time be moved into the \pkg{l3pdf}
+% module of l3kernel.
+%
+% \item[l3pdf\/file] This module provides commands for to embed files.
+%
+% \item[pdfmanagement-firstaid] This module provides a number of patches
+% for external incompatible packages. This patches will disappear as soon as
+% the packages are natively compatible. It is loaded automatically.
+%
+% \end{description}
+% \section{Incompabilities}
+%
+% As described in section~\ref{sec:change}, if activated
+% the new PDF management takes over the management of core PDF dictionaries.
+% All packages
+% that bypass the PDF management and access these dictionaries with primitives like
+% \cs{pdfcatalog}, \cs{pdfinfo}, \cs{pdfpageresources}, \cs{pdfpagesattr}
+% and \cs{pdfpageattr} or similar commands from other engines and backends are
+% basically incompatible: values can get lost or will be wrong.
+%
+% The following describes known incompatible packages along with some suggestions
+% how this should or will be handled in future. The list is not exhaustive.
+%
+% \subsection{hyperref}
+% A generic driver that can
+% be used as replacement has been developed and is provided by this bundle.
+% It will be loaded automatically if the pdf management is active.
+%
+% The generic driver differs in some points from other \pkg{hyperref} drivers:
+% \begin{itemize}
+% \item The code for bookmarks has been removed from this driver, instead
+% the \pkg{bookmarks} is loaded and used.
+% \item The driver isn't yet fully integrated into hyperref. This means that
+% it doesn't react to a number of package options. Instead \cs{hypersetup} should
+% be used.
+% \item Incomplete is the support for form fields. Quite probably form fields will
+% be extracted in a dedicated package.
+% \item The driver uses for the color handling the l3color package. While normally
+% it should be able to use colors defined with color and xcolor, there could be
+% edge cases where it fails.
+% \item The colors have been changed (this counts probably as an improvement \ldots).
+% \end{itemize}
+%
+% More details can be found in the documentation \pkg{hyperref-generic.pdf}.
+%
+% \subsection{pdfx}
+% \pkg{pdfx} is not compatible. It uses the commands \cs{pdfpagesattr}, \cs{pdfpageattr},
+% \cs{pdfinfo} and \cs{pdfcatalog}. The needed changes are not many, but can
+% not be done by external patches.
+%
+% It is also one goal of the pdfmanagement project to
+% offer support for standards natively. The code is under development,
+% see the documentation of \pkg{l3pdfmeta}.
+%
+% \subsection{hyperxmp}
+% \pkg{hyperxmp} uses \cs{pdfcatalog} to insert the \texttt{/MetaData} reference. This
+% makes it incompatible, but adjusting this is even possible with external
+% patches. \pkg{hyperxmp} also relies on some \pkg{hyperref} internals, so
+% changes in \pkg{hyperref} must be coordinated.
+%
+% Some patch code is provided by the bundle and loaded automatically,
+% but it is not complete currently. Failures are e.g. possible with complicated
+% author or title settings. The handling of dates isn't correct either yet.
+% The patch code can be disabled by using |firstaidoff=hyperxmp| in \cs{DeclareDocumentMetadata}
+%
+% \subsection{tikz/pgf}
+% \pkg{pgf} writes to the page resources too and so is incompatible. The needed
+% changes are rather small and will be done in coordination with the maintainer.
+% Until this works, \pkg{pagemanagement} will load the patches automatically.
+% This can be disabled by using |firstaidoff=pgf| in \cs{DeclareDocumentMetadata}
+%
+% \subsection{transparent}
+% The package \pkg{transparent} is incompatible. A replacement has been written
+% (\pkg{transparent-ltx}) and is loaded automatically. It requires a very recent
+% L3 programming layer!
+% This can be disabled by using |firstaidoff=transparent| in \cs{DeclareDocumentMetadata}
+% \subsection{pdflscape}
+% The package \pkg{pdflscape} is incompatible. A replacement has been written
+% (\pkg{pdflscape-ltx}) and is loaded automatically.
+% This can be disabled by using |firstaidoff=pdflscape| in \cs{DeclareDocumentMetadata}
+%
+% \subsection{colorspace}
+% The package is incompatible. Some patches
+% have been added to \pkg{pdfmanagement-firstaid}.
+% Alternative code for spot colors is
+% in the \pkg{l3color} package which has now been add to \pkg{l3kernel}.
+%
+% \subsection{embedfile, attachfile, attachfile2}
+% Tools needed to be able to write a replacement
+% to replace these packages have been developed in the \pkg{l3pdffile} package.
+% Full replacements for the packages don't exist yet.
+%
+% \subsection{tagpdf}
+% The development code is compatible and will be uploaded in time.
+%
+% \subsection{ocgx2, animate, media9}
+% These package all make use of low-level PDF command and will
+% have to be reviewed.
+%
+% \subsection{acrotex}
+% The \pkg{acrotex} makes heavy use of PDF commands and so must be reviewed and
+% adapted, including the currently untested route dvips + distiller.
+%
+% \subsection{fancytooltips}
+% This package uses \cs{pdfpageattr} and \pkg{acrotex} and so must be reviewed.
+% \end{documentation}
+%
+%
+% \begin{implementation}
+%
+% \section{Implementation}
+%
+%    \begin{macrocode}
+%<@@=pdf>
+%<*package>
+\ProvidesExplPackage {pdfmanagement-testphase} {2021-02-22} {0.95a}
+  {LaTeX PDF management testphase bundle}
+\providecommand\IfFormatAtLeastTF{\@ifl@t@r\fmtversion}
+\IfFormatAtLeastTF{2020-10-01}{}{
+ \PackageWarning{pdfmanagement-testphase}
+   {This~package~needs~LaTeX~2020-10-01~or~newer.
+    \MessageBreak Loading~is~aborted.}{}
+ \DeclareOption { debug }{}
+ \newcommand\DeclareDocumentMetadata[1]{}
+ \ProcessOptions\relax
+ }
+\IfFormatAtLeastTF{2020-10-01}{}{\endinput}
+
+\DeclareOption { debug }
+  {
+    \msg_redirect_module:nnn { pdf } { none } { warning }
+  }
+
+\ProcessOptions\relax
+%</package>
+%    \end{macrocode}
+%
+% \subsection{Loading the core files.}
+% This loads the core files. The backend should not be loaded
+% to allow to set it in the document.
+%    \begin{macrocode}
+%<*header>
+\ProvidesExplFile
+  {pdfmanagement-testphase.ltx}{2021-02-22}{0.95a}
+  {PDF~management~code~(testphase)}
+%</header>
+%<*package>
+%\RequirePackage{l3pdfdict}       % needed by l3pdfmanagement
+%\RequirePackage{l3pdfmanagement} % loads the core code with the boolean
+%\RequirePackage{ltdocinit}       % DeclareDocumentMetadata,
+%% can perhaps be combined or made optional ...
+%\RequirePackage{l3pdfannot}
+%\RequirePackage{l3pdfxform-beta}
+%\RequirePackage{l3pdfmeta}       %
+%\RequirePackage{l3pdftools}
+%\RequirePackage{l3pdffile}
+\input{pdfmanagement-testphase.ltx}
+%</package>
+%    \end{macrocode}
+% \end{implementation}
+% \newpage
+% \PrintIndex
diff --git a/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-testphase.ins b/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-testphase.ins
new file mode 100644
index 00000000000..6452b24c68d
--- /dev/null
+++ b/Master/texmf-dist/source/latex/pdfmanagement-testphase/pdfmanagement-testphase.ins
@@ -0,0 +1,211 @@
+\iffalse meta-comment
+
+File: pdfmanagement-testphase.ins
+
+Copyright (C) 2019-2021 The LaTeX Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   https://www.latex-project.org/lppl.txt
+
+This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+The released version of this bundle is available from CTAN.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/pdfresources
+
+for those people who are interested.
+
+-----------------------------------------------------------------------
+
+\fi
+
+\input l3docstrip.tex
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+Copyright (C) 2019-2021 The LaTeX Project
+
+It may be distributed and/or modified under the conditions of
+the LaTeX Project Public License (LPPL), either version 1.3c of
+this license or (at your option) any later version.  The latest
+version of this license is in the file:
+
+   https://www.latex-project.org/lppl.txt
+
+This file is part of the "LaTeX PDF management testphase bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+% stop docstrip adding \endinput
+\postamble
+\endpostamble
+
+\keepsilent
+
+\generate
+  {%
+    \file{pdfmanagement-testphase.sty}
+      {%
+        \from{pdfmanagement-testphase.dtx}{package}
+      }%
+  }
+
+%\generate{\file{ltdocinit.sty}
+%  {
+%    \from{ltdocinit.dtx}            {header,package}
+%  }
+%}
+%\generate{\file{l3pdfdict.sty}
+%  {
+%    \from{l3pdfdict.dtx}            {header,package}
+%  }
+%}
+%
+%\generate{\file{l3pdfmanagement.sty}
+%  {
+%    \from{l3pdfmanagement.dtx}            {header,package}
+%  }
+%}
+%
+%\generate{\file{l3pdfmeta.sty}
+%  {
+%    \from{l3pdfmeta.dtx}            {header,package}
+%  }
+%}
+%
+%\generate{\file{l3pdftools.sty}
+%  {
+%    \from{l3pdftools.dtx}            {header,package}
+%  }
+%}
+
+\generate
+  {%
+    \file{pdfmanagement-firstaid.sty}
+      {%
+        \from{pdfmanagement-firstaid.dtx}{package}
+      }%
+  }
+
+%\generate
+%  {%
+%    \file{l3pdfannot.sty}
+%      {%
+%        \from{l3pdfannot.dtx}{header,package}
+%      }%
+%  }
+%
+%\generate
+%  {%
+%    \file{l3pdfxform-beta.sty}
+%      {%
+%        \from{l3pdfxform.dtx}{header,package}
+%      }%
+%  }
+%
+%\generate
+%  {%
+%    \file{l3pdffile.sty}
+%      {%
+%        \from{l3pdffile.dtx}{header,package}
+%      }%
+%  }
+
+\generate
+  {
+   \file{l3backend-testphase-dvipdfmx.def}
+     {
+       \from{l3backend-testphase.dtx}{drivers,dvipdfmx}
+     }
+  }
+
+\generate
+  {
+    \file{l3backend-testphase-dvips.def}
+      {
+        \from{l3backend-testphase.dtx}{drivers,dvips}
+      }
+  }
+
+\generate
+  {
+    \file{l3backend-testphase-dvisvgm.def}
+      {
+        \from{l3backend-testphase.dtx}{drivers,dvisvgm}
+      }
+  }
+
+\generate
+  {
+    \file{l3backend-testphase-luatex.def}
+      {
+        \from{l3backend-testphase.dtx}{drivers,luatex}
+      }
+  }
+
+\generate
+  {
+    \file{l3backend-testphase-pdftex.def}
+      {
+        \from{l3backend-testphase.dtx}{drivers,pdftex}
+      }
+  }
+\generate
+  {
+    \file {l3backend-testphase-xetex.def}
+      {
+       \from{l3backend-testphase.dtx}{drivers,xdvipdfmx}
+      }
+  }
+
+\generate
+  {
+    \file {hgeneric-testphase.def}
+      {
+       \from{hyperref-generic.dtx}{package}
+      }
+  }
+\generate
+  {
+    \file {hyperref-colorschemes.def}
+      {
+       \from{hyperref-generic.dtx}{colorscheme}
+      }
+  }
+
+\generate
+  {
+    \file {pdfmanagement-testphase.ltx}
+      {
+       \from{pdfmanagement-testphase.dtx}{header}
+       \from{l3pdfdict.dtx}{package}
+       \from{l3pdfmanagement.dtx}{package}
+       \from{ltdocinit.dtx}{package}
+       \from{l3pdfannot.dtx}{package}
+       \from{l3pdfxform.dtx}{package}
+       \from{l3pdfmeta.dtx}{package}
+       \from{l3pdftools.dtx}{package}
+       \from{l3pdffile.dtx}{package}
+      }
+  }
+
+\def\MetaPrefix{-- }
+\def\defaultpostamble{%
+  \MetaPrefix^^J%
+  \MetaPrefix\space End of File `\outFileName'.%
+}
+\def\currentpostamble{\defaultpostamble}%
+\generate{\file{l3backend-testphase.lua}   {\from{l3backend-testphase.dtx}{lua}}}
+\endbatchfile