duckuments (20mar18)

git-svn-id: svn://tug.org/texlive/trunk@47048 c570f23f-e606-0410-a88d-b1316a301751

4 files changed, 811 insertions, 364 deletions

diff --git a/Master/texmf-dist/doc/latex/duckuments/duckuments.pdf b/Master/texmf-dist/doc/latex/duckuments/duckuments.pdf
index 1647d1ce190..80af11fc64b 100644
--- a/Master/texmf-dist/doc/latex/duckuments/duckuments.pdf
+++ b/Master/texmf-dist/doc/latex/duckuments/duckuments.pdf
diff --git a/Master/texmf-dist/source/latex/duckuments/duckuments.dtx b/Master/texmf-dist/source/latex/duckuments/duckuments.dtx
index 2dc63666343..20cb8550c35 100644
--- a/Master/texmf-dist/source/latex/duckuments/duckuments.dtx
+++ b/Master/texmf-dist/source/latex/duckuments/duckuments.dtx
@@ -85,8 +85,8 @@ and the derived files           duckuments.pdf,
 %</eid>
 %
 %<*pkg>
-\def\duckuments@version{v0.2}
-\def\duckuments@date{2018/03/14}
+\def\duckuments@version{v0.3}
+\def\duckuments@date{2018/03/19}
 \ProvidesExplPackage
   {duckuments}          {\duckuments@date}
   {\duckuments@version} {minimal working duckuments}
@@ -101,9 +101,9 @@ and the derived files           duckuments.pdf,
 % \maketitle
 % \tableofcontents
 %
-% \begin{documentation}
+% \begin{documentation}^^A>>>
 %
-% \section{Introduction}
+% \section{Introduction}^^A>>>
 %
 % This package was inspired by the question
 % \href{https://tex.stackexchange.com/questions/419751}
@@ -122,12 +122,13 @@ and the derived files           duckuments.pdf,
 % \href{https://github.com/Skillmon/ltx_duckuments}{github}.
 %
 % \textbf{The package does currently only work on \pdfTeX, \LuaTeX, and \XeTeX}.
+%^^A<<<
 %
-% \section{Duckumentation}
+% \section{Duckumentation}^^A>>>
 %
-% \subsection{Dummy content}
+% \subsection{Dummy content}^^A>>>
 %
-% \begin{function}{\duckument}
+% \begin{function}{\duckument}^^A>>>
 %   \begin{syntax}
 %     \cs{duckument}\oarg{key=value}
 %   \end{syntax}
@@ -136,54 +137,55 @@ and the derived files           duckuments.pdf,
 %   \env{itemize}, \env{enumerate}, and \env{description}, one only at top
 %   level and one with 4~environments nested. The \meta{key=value}s accept every
 %   key as explained in \autoref{sec:keys}, but not every key has an effect.
-% \end{function}
+% \end{function}^^A<<<
 %
-% \begin{function}{\blindduck}
+% \begin{function}{\blindduck}^^A>>>
 %   \begin{syntax}
 %     \cs{blindduck}\oarg{key=value}
 %   \end{syntax}
 %   Produces one paragraph of dummy content. The \meta{key=value}s accept every
 %   key as explained in \autoref{sec:keys}, but not every key has an effect.
-% \end{function}
+% \end{function}^^A<<<
 %
-% \begin{function}{\ducklist}
+% \begin{function}{\ducklist}^^A>>>
 %   \begin{syntax}
 %     \cs{ducklist}\meta{*}\marg{environment}
 %   \end{syntax}
 %   Sets a list of the specified \meta{environment}, if \meta{*} is given
 %   \cs{item}\oarg{dummy} is used instead of only \cs{item}. For |description|
 %   the starred version is used automatically.
-% \end{function}
+% \end{function}^^A<<<
 %
-% \begin{function}{\ducklistlist}
+% \begin{function}{\ducklistlist}^^A>>>
 %   \begin{syntax}
 %     \cs{ducklistlist}\meta{*}\marg{list}
 %   \end{syntax}
 %   Sets 4~levels of a nested list of the specified \meta{environment}, if
 %   \meta{*} is given \cs{item}\oarg{dummy} is used instead of only \cs{item}.
 %   For |description| the starred version is used automatically.
-% \end{function}
+% \end{function}^^A<<<
 %
-% \begin{function}{\duckitemize}
+% \begin{function}{\duckitemize}^^A>>>
 %   Abbreviation for \cs{ducklist}|{itemize}|.
-% \end{function}
+% \end{function}^^A<<<
 %
-% \begin{function}{\duckenumerate}
+% \begin{function}{\duckenumerate}^^A>>>
 %   Abbreviation for \cs{ducklist}|{enumerate}|.
-% \end{function}
+% \end{function}^^A<<<
 %
-% \begin{function}{\duckdescription}
+% \begin{function}{\duckdescription}^^A>>>
 %   Abbreviation for \cs{ducklist}|{description}|.
-% \end{function}
+% \end{function}^^A<<<
+%^^A<<<
 %
-% \subsection{Other Macros}
+% \subsection{Other Macros}^^A>>>
 %
-% \begin{function}{\duckumentsCreateExampleFile}
+% \begin{function}{\duckumentsCreateExampleFile}^^A>>>
 %   Creates the file \file{example-image-duck.tex} in the current working
 %   directory.
-% \end{function}
+% \end{function}^^A<<<
 %
-% \begin{function}{\duckumentsDrawRandomDucks}
+% \begin{function}{\duckumentsDrawRandomDucks}^^A>>>
 %   \begin{syntax}
 %     \cs{duckumentsDrawRandomDucks}\oarg{count}
 %   \end{syntax}
@@ -191,9 +193,10 @@ and the derived files           duckuments.pdf,
 %   \pkg{Ti\textit{k}Z}. \meta{count} defaults to \cs{duckuments@randoms}.
 %   Note that \pkg{duckuments} doesn't load \pkg{Ti\textit{k}Z}, this macro is
 %   for the use in \file{example-image-duck.tex}.
-% \end{function}
+% \end{function}^^A<<<
+%^^A<<<
 %
-% \subsection{Patches}
+% \subsection{Patches}^^A>>>
 %
 % The package patches \cs{includegraphics} if it is defined at the time the
 % patch is applied (see \autoref{sec:keys}, |immediate|). The patch changes the
@@ -209,28 +212,50 @@ and the derived files           duckuments.pdf,
 %
 % The patch is done so that one can use \pkg{tikzducks} ducks without the need
 % of loading \pkg{tikz} in a minimal working duckument as example images.
+%^^A<<<
 %
-% \subsection{Options}\label{sec:keys}
+% \subsection{Options}\label{sec:keys}^^A>>>
 %
 % The package and commands which take a \oarg{key=value} accept the following
 % options. Some of which only make sense as package options. The
 % \textbf{\texttt{bold}} printed value is the one used if you don't specify a
-% value.
+% value. The \textit{\texttt{italic}} printed value is the default.
 % \begin{options}
-%   \item[toc=\textbf{true}$\vert$false]
+%   \item[toc=\textbf{true}$\vert$\textit{false}]
 %     If |true| the \cs{duckument} contains a ToC.
-%   \item[maths=\textbf{both}$\vert$inline$\vert$display$\vert$none]
+%   \item[maths=\textbf{both}$\vert$inline$\vert$display$\vert$\textit{none}]
 %     If |both| the \cs{blindduck} (which is also used by \cs{duckument})
 %     contains both inline and displayed math. With |inline| and |display| the
 %     respective maths is activated. |none| disables both.
-%   \item[immediate=\textbf{true}$\vert$false]
+%   \item[full]
+%     This typesets the full range of \cs{blindduck}. Don't use this as a
+%     package option.
+%   \item[immediate=\textbf{true}$\vert$\textit{false}]
 %     If |true| \cs{includegraphics} is patched during package load time, else
 %     the patching is done \cs{AtBeginDocument}.
 % \end{options}
-%
-% \end{documentation}
-%
-% \begin{implementation}
+% Additionally \cs{blindduck} and \cs{duckument} accept another key which must
+% match one of the following patterns and doesn't get any value. Patterns:
+% \begin{description}[style=nextline,font=\normalfont\ttfamily]
+%   \def\num#1{\texttt{\meta{num#1}}}%
+%   \item[\meta{num1}] The paragraph \num{1} is used instead of the first.
+%   \item[\meta{num1-}] Like the above but after the paragraph a \cs{par} is
+%     inserted
+%   \item[\meta{-num2}] The paragraphs from one after the last time \num{1}
+%     or \num{2} was used as an argument (the latter if both) up to
+%     \num{2} are printed. A \cs{par} is inserted after it.
+%   \item[\meta{num1-num2}] The paragraphs from \num{1} up to \num{2}
+%     are printed. A \cs{par} is inserted after it.
+%   \item[\meta{-}] The next paragraph after the last time \num{1} or
+%     \num{2} was used (the latter if both) is printed. A \cs{par} is
+%     inserted after it.
+% \end{description}
+%^^A<<<
+%^^A<<<
+%
+% \end{documentation}^^A<<<
+%
+% \begin{implementation}^^A>>>
 %
 % \section{Implementation}
 %
@@ -242,10 +267,10 @@ and the derived files           duckuments.pdf,
 %<@@=duckuments>
 %    \end{macrocode}
 %
-% \subsection{Check for possible problems}
+% \subsection{Check for possible problems}^^A>>>
 %
 % Check which engine is used.
-%    \begin{macrocode}
+%    \begin{macrocode}^^A>>>
 \bool_if:nF
   {
     \sys_if_engine_luatex_p:
@@ -264,9 +289,9 @@ and the derived files           duckuments.pdf,
     \msg_error:nn { duckuments } { incompatible }
     \endinput
   }%<<<
-%    \end{macrocode}
+%    \end{macrocode}^^A<<<
 % Check whether \file{example-image-duck.pdf} exists.
-%    \begin{macrocode}
+%    \begin{macrocode}^^A>>>
 \file_if_exist:nF { example-image-duck.pdf }
   {%>>>
 %    \end{macrocode}
@@ -293,230 +318,226 @@ and the derived files           duckuments.pdf,
           }
       }
   }%<<<
-%    \end{macrocode}
+%    \end{macrocode}^^A<<<
+%^^A<<<
 %
-% \subsection{Variables}
+% \subsection{Variables}^^A>>>
 %
-% \begin{variable}{\duckuments@randoms}
+% \begin{variable}{\duckuments@randoms}^^A>>>
 %   Stores the number of random ducks in \file{example-image-duck.pdf}.
 %    \begin{macrocode}
 \newcommand*\duckuments@randoms{128}
 %    \end{macrocode}
-% \end{variable}
+% \end{variable}^^A<<<
 %
-%
-% \begin{variable}{\l_duckuments_immediate_bool}
+% \begin{variable}{\l_duckuments_immediate_bool}^^A>>>
 %   Stores whether the patch is to be done during package load time.
 %    \begin{macrocode}
 \bool_new:N \l_duckuments_immediate_bool
 %    \end{macrocode}
-% \end{variable}
+% \end{variable}^^A<<<
 %
-% \begin{variable}{\l_duckuments_toc_bool}
+% \begin{variable}{\l_duckuments_toc_bool}^^A>>>
 %   Stores whether to display a ToC in \cs{duckument}.
 %    \begin{macrocode}
 \bool_new:N \l_duckuments_toc_bool
 %    \end{macrocode}
-% \end{variable}
+% \end{variable}^^A<<<
 %
-% \begin{variable}{\l_duckuments_math_inline_bool}
+% \begin{variable}{\l_duckuments_math_inline_bool}^^A>>>
 %   Stores whether to display inline math in \cs{blindduck}.
 %    \begin{macrocode}
 \bool_new:N \l_duckuments_math_inline_bool
 %    \end{macrocode}
-% \end{variable}
+% \end{variable}^^A<<<
 %
-% \begin{variable}{\l_duckuments_math_display_bool}
+% \begin{variable}{\l_duckuments_math_display_bool}^^A>>>
 %   Stores whether to display displayed math in \cs{blindduck}.
 %    \begin{macrocode}
 \bool_new:N \l_duckuments_math_display_bool
 %    \end{macrocode}
-% \end{variable}
+% \end{variable}^^A<<<
+%
+% \begin{variable}{\l_duckuments_blindduck_pars_bool}^^A>>>
+%   Stores whether each paragraph of \cs{blindduck} should end with a \cs{par}.
+%    \begin{macrocode}
+\bool_new:N \l_duckuments_blindduck_pars_bool
+%    \end{macrocode}
+% \end{variable}^^A<<<
 %
-% \subsection{Constants}
+% \begin{variable}{\l_duckuments_range_seq}^^A>>>
+%   Stores the paragraphs range for \cs{blindduck}.
+%    \begin{macrocode}
+\seq_new:N \l_duckuments_range_seq
+%    \end{macrocode}
+% \end{variable}^^A<<<
 %
-% \begin{variable}{\c_duckuments_regex}
+% \begin{variable}{\g_duckuments_blindduck_start_int}^^A>>>
+%   Stores the paragraph with which \cs{blindduck} should start.
+%    \begin{macrocode}
+\int_new:N \g_duckuments_blindduck_start_int
+\int_gset:Nn \g_duckuments_blindduck_start_int { \c_one }
+%    \end{macrocode}
+% \end{variable}^^A<<<
+%
+% \begin{variable}{\g_duckuments_blindduck_end_int}^^A>>>
+%   Stores the paragraph with which \cs{blindduck} should end.
+%    \begin{macrocode}
+\int_new:N \g_duckuments_blindduck_end_int
+%    \end{macrocode}
+% \end{variable}^^A<<<
+%^^A<<<
+%
+% \subsection{Constants}^^A>>>
+%
+% \begin{variable}{\c_duckuments_example_regex}^^A>>>
 %   Regex against which the patch of \cs{includegraphics} is testing.
 %    \begin{macrocode}
-\regex_const:Nn \c_duckuments_regex
+\regex_const:Nn \c_duckuments_example_regex
   { example-image-duck|example-image-duck.pdf }
 %    \end{macrocode}
-% \end{variable}
+% \end{variable}^^A<<<
 %
-% \begin{variable}{\c_duckuments_example_pages_int}
+% \begin{variable}{\c_duckuments_range_regex}^^A>>>
+%   Regex against which the optional range in \cs{blindduck} is checked.
 %    \begin{macrocode}
-\str_if_eq:VnF \c_sys_jobname_str { example-image-duck }
-{\file_if_exist:nTF { example-image-duck.pdf }
-  {
-    \sys_if_engine_pdftex:T
-      {
-        \pdfximage{example-image-duck.pdf}
-        \int_const:Nn \c_duckuments_example_pages_int
-          { \the\pdflastximagepages }
-      }
-    \sys_if_engine_luatex:T
-      {
-        \saveimageresource{example-image-duck.pdf}
-        \int_const:Nn \c_duckuments_example_pages_int 
-          { \lastsavedimageresourcepages }
-      }
-    \sys_if_engine_xetex:TF
-      {
-        \int_set:Nn \l_tmpa_int { \XeTeXpdfpagecount "example-image-duck.pdf" }
-        \int_const:Nn \c_duckuments_example_pages_int { \l_tmpa_int }
+\regex_const:Nn \c_duckuments_range_regex { (\d+|\d+-|-\d+|\d+-\d+|-) }
 %    \end{macrocode}
-% For \XeTeX\ we need a bit more code in order to get random numbers. The
-% following is an implementation of RC4. First declare some variables:
+% \end{variable}^^A<<<
+%
+% \begin{variable}{\c_duckuments_blindduck_pars_int}^^A>>>
 %    \begin{macrocode}
-        \int_new:N \g_duckuments_RCiv_i_int
-        \int_new:N \g_duckuments_RCiv_j_int
-        \int_new:N \g_duckuments_RCiv_keylength_int
-        \int_new:N \g_duckuments_tmpa_int
-        \int_const:Nn \c_duckuments_RCiv_Slength_int { 256 }
-        \tl_new:N \l_duckuments_tmpa_tl
-        \tl_new:N \l_duckuments_tmpb_tl
-        \cs_generate_variant:Nn \prop_gput:Nnn { Nxx }
-        \cs_generate_variant:Nn \prop_get:NnN { NxN }
+\int_const:Nn \c_duckuments_blindduck_pars_int { \c_five }
 %    \end{macrocode}
-% Initialize the S array:
+% \end{variable}^^A<<<
+%
+% \begin{variable}{\c_duckuments_example_pages_int}^^A>>>
 %    \begin{macrocode}
-        \prop_new:N \g_duckuments_RCiv_S_prop
-        \int_step_inline:nnnn { 0 } { 1 } { 255 }
-          {
-            \prop_gput:Nnn \g_duckuments_RCiv_S_prop { #1 } { #1 }
-          }
-        \prop_new:N \g_duckuments_RCiv_key_prop
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 0 } { \int_use:N \c_sys_minute_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 1 } { \c_sys_hour_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 2 } { \c_sys_day_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 3 } { \c_sys_month_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 4 } { \int_eval:n {  \int_mod:nn { \c_sys_year_int } { 256 } } }
-        \int_gset:Nn \g_duckuments_RCiv_keylength_int { 5 }
-        \str_map_inline:Nn \c_sys_jobname_str
-          {
-            \prop_gput:Nxx \g_duckuments_RCiv_key_prop 
-              { \int_use:N \g_duckuments_RCiv_keylength_int }
-              { \int_from_alph:n { #1 } }
-            \int_gadd:Nn \g_duckuments_RCiv_keylength_int { 1 }
-          }
-        \cs_new:Nn \duckuments_swap_prop_entries:Nnn
+\str_if_eq:VnF \c_sys_jobname_str { example-image-duck }
+  {
+    \file_if_exist:nTF { example-image-duck.pdf }
+      {
+        \sys_if_engine_pdftex:T
           {
-            \prop_get:NnN #1 { #2 } \l_duckuments_tmpa_tl
-            \prop_get:NnN #1 { #3 } \l_duckuments_tmpb_tl
-            \prop_gput:Nnx #1 { #2 } { \l_duckuments_tmpb_tl }
-            \prop_gput:Nnx #1 { #3 } { \l_duckuments_tmpa_tl }
+            \pdfximage{example-image-duck.pdf}
+            \int_const:Nn \c_duckuments_example_pages_int
+              { \the\pdflastximagepages }
           }
-        \cs_generate_variant:Nn \duckuments_swap_prop_entries:Nnn { Nxx }
-        \cs_new:Nn \duckuments_gadd_mod:Nnn
+        \sys_if_engine_luatex:T
           {
-            \int_gset:Nn #1 { \int_mod:nn { #1 + #2 } { #3 } }
+            \saveimageresource{example-image-duck.pdf}
+            \int_const:Nn \c_duckuments_example_pages_int 
+              { \lastsavedimageresourcepages }
           }
-        \cs_generate_variant:Nn \duckuments_gadd_mod:Nnn { Nxn }
-        \cs_new:Nn \duckuments_gadd_mod_Slength:Nn
+        \sys_if_engine_xetex:T
           {
-            \duckuments_gadd_mod:Nnn #1
-              { #2 } { \c_duckuments_RCiv_Slength_int }
+            \group_begin:
+              \int_gset:Nn \l_tmpa_int
+                { \XeTeXpdfpagecount "example-image-duck.pdf" }
+              \int_const:Nn \c_duckuments_example_pages_int { \l_tmpa_int }
+            \group_end:
           }
-        \int_step_inline:nnnn { 0 } { 1 } { 255 }
-          {
-            \prop_get:NnN \g_duckuments_RCiv_S_prop { #1 } \l_duckuments_tmpa_tl
-            \int_gset:Nn \g_duckuments_tmpa_int
-              {
-                \int_mod:nn
-                  { #1 }
-                  { \g_duckuments_RCiv_keylength_int }
-              }
-            \prop_get:NxN \g_duckuments_RCiv_key_prop
-              { \int_use:N \g_duckuments_tmpa_int } \l_duckuments_tmpb_tl
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
-              { \l_duckuments_tmpa_tl + \l_duckuments_tmpb_tl }
-            \duckuments_swap_prop_entries:Nxx \g_duckuments_RCiv_S_prop
-              { #1 } { \int_use:N \g_duckuments_RCiv_j_int }
-          }
-        \int_gzero:N \g_duckuments_RCiv_i_int
-        \int_gzero:N \g_duckuments_RCiv_j_int
+      }
+  }
+  { \int_const:Nn \c_duckuments_example_pages_int { 1 } }
 %    \end{macrocode}
-% Provide a function which gets the next random number and sets
-% |\duckuments_random_page:| to it.
+% \end{variable}^^A<<<
+%^^A<<<
+%
+% \subsection{Messages}^^A>>>
+%
+%    \begin{macrocode}^^A duckuments option~unknown >>>
+\msg_new:nnnn { duckuments } { option~unknown }
+  {
+    Unknown~option~'#1'~for~package~duckuments.
+  }
+  { 
+    \ ~__________________________________\\
+    \ (Quack!~Nothing~here,~sorry.~Quack!)\\
+    \ ~""""""""""""""""""""""""""""""""""\\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\string\ \\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~>()_\\
+    \ \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~(__)__
+  }
+%    \end{macrocode}^^A<<<
+%    \begin{macrocode}^^A duckuments out~of~range >>>
+\msg_new:nnnn { duckuments } { out~of~range }
+  {
+    You~requested~element~#3~out~of~the~range~#1~to~#2~of~array~'#4'.\\
+    I'll~just~use~element~#1~for~you.
+  }
+  { 
+    \ ~__________________________________\\
+    \ (Quack!~Nothing~here,~sorry.~Quack!)\\
+    \ ~""""""""""""""""""""""""""""""""""\\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\string\ \\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~>()_\\
+    \ \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~(__)__
+  }
+%    \end{macrocode}^^A<<<
+%
+% \begin{macro}{\duckuments_patch_see_duckumentation:}^^A>>>
 %    \begin{macrocode}
-        \cs_new:Nn \duckuments_get_random_page:
-          {
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_i_int { \c_one } 
-            \prop_get:NxN \g_duckuments_RCiv_S_prop
-              { \int_use:N \g_duckuments_RCiv_i_int } \l_duckuments_tmpa_tl
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
-              { \l_duckuments_tmpa_tl }
-            \duckuments_swap_prop_entries:Nxx \g_duckuments_RCiv_S_prop
-              { \int_use:N \g_duckuments_RCiv_i_int }
-              { \int_use:N \g_duckuments_RCiv_j_int }
-            \int_gset:Nn \g_duckuments_tmpa_int { \l_duckuments_tmpa_tl }
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_tmpa_int
-              { \l_duckuments_tmpb_tl }
-            \prop_get:NxN \g_duckuments_RCiv_S_prop
-              { \int_use:N \g_duckuments_tmpa_int } \l_duckuments_tmpa_tl
-            \int_gset:Nn \g_duckuments_tmpa_int
-              {
-                \int_mod:nn
-                  { \l_duckuments_tmpa_tl } { \c_duckuments_example_pages_int }
-                + \c_one
-              }
-            \cs_set:Nx \duckuments_random_page:
-              { \int_use:N \g_duckuments_tmpa_int }
-          }
-        \cs_new:Nn \duckuments_random_page: { 1 }
-      }
+\cs_new:Nn \duckuments_patch_see_duckumentation:
+  {%>>>
+    \cs_set:Nn \msg_see_documentation_text:n
       {
-        \cs_new:Nn \duckuments_get_random_page: {}
-        \cs_new:Nn \duckuments_random_page:
-          { \int_rand:nn { 1 } { \c_duckuments_example_pages_int } }
+        \\\\
+        See~the~\str_if_eq:nnTF { ##1 } { LaTeX } { LaTeX3~documentation }
+          {
+            \str_if_eq:nnTF { ##1 } { duckuments } { duckumentation }
+              { ##1~documentation }
+          }~for~further~information.
       }
-  }}
-  {
-    \int_const:Nn \c_duckuments_example_pages_int { 1 }
-  }
+  }%<<<
+\duckuments_patch_see_duckumentation:
 %    \end{macrocode}
-% \end{variable}
+% \end{macro}^^A<<<
+%^^A<<<
 %
-%
-% \subsection{Options and Configurations}
+% \subsection{Options and Configurations}^^A>>>
 %    \begin{macrocode}
 \keys_define:nn { duckuments }
   {%>>>
-    ,toc   .bool_set:N = \l_duckuments_toc_bool
-    ,toc   .default:n = true
+    ,immediate .bool_set:N = \l_duckuments_immediate_bool
+    ,immediate .default:n = true
+    ,full .code:n =
+      \duckuments_blindduck_range_test:n { 1-\c_duckuments_blindduck_pars_int }
     ,maths .choice:
     ,maths / both    .code:n =
       {
         \bool_set_true:N \l_duckuments_math_inline_bool
         \bool_set_true:N \l_duckuments_math_display_bool
       }
+    ,maths / display .code:n = \bool_set_true:N \l_duckuments_math_display_bool
+    ,maths / inline  .code:n = \bool_set_true:N \l_duckuments_math_inline_bool
     ,maths / none    .code:n =
       {
         \bool_set_false:N \l_duckuments_math_inline_bool
         \bool_set_false:N \l_duckuments_math_display_bool
       }
-    ,maths / inline  .code:n = \bool_set_true:N \l_duckuments_math_inline_bool
-    ,maths / display .code:n = \bool_set_true:N \l_duckuments_math_display_bool
     ,maths .default:n = both
-    ,immediate .bool_set:N = \l_duckuments_immediate_bool
-    ,immediate .default:n = true
+    ,toc   .bool_set:N = \l_duckuments_toc_bool
+    ,toc   .default:n = true
+    ,unknown .code:n =
+      { \msg_error:nnx { duckuments } { option~unknown } { \l_keys_key_tl } }
   }%<<<
 \ProcessKeysOptions { duckuments }
+\keys_define:nn { duckuments }
+  {%>>>
+    unknown .code:n = \duckuments_blindduck_range_test:V \l_keys_key_tl
+  }%<<<
 \bool_if:NTF \l_duckuments_immediate_bool
   { \AtEndOfPackage { \duckuments_patch_includegraphics: } }
   { \AtBeginDocument { \duckuments_patch_includegraphics: } }
 %    \end{macrocode}
+%^^A<<<
 %
-% \subsection{Functions}
+% \subsection{Functions}^^A>>>
 %
-% \subsubsection{Duckument Level}
+% \subsubsection{Duckument Level}^^A>>>
 %
-% \begin{macro}{\duckument}
+% \begin{macro}{\duckument}^^A>>>
 %    \begin{macrocode}
 \NewDocumentCommand \duckument { O{} }
   {%>>>
@@ -536,21 +557,22 @@ and the derived files           duckuments.pdf,
     \group_end:
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\blindduck}
+% \begin{macro}{\blindduck}^^A>>>
 %    \begin{macrocode}
 \NewDocumentCommand \blindduck { O{} }
   {%>>>
     \group_begin:
     \keys_set:nn { duckuments } { #1 }
     \duckuments@blindduck@text
+    \bool_if:NT \l_duckuments_blindduck_pars_bool { \par }
     \group_end:
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\ducklist}
+% \begin{macro}{\ducklist}^^A>>>
 %    \begin{macrocode}
 \NewDocumentCommand \ducklist {s m}
   {%>>>
@@ -565,9 +587,8 @@ and the derived files           duckuments.pdf,
     \end{#2}
   }%<<<
 %    \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\ducklistlist}
+% \end{macro}^^A<<<
+% \begin{macro}{\ducklistlist}^^A>>>
 %    \begin{macrocode}
 \NewDocumentCommand \ducklistlist { s m }
   {%>>>
@@ -580,26 +601,25 @@ and the derived files           duckuments.pdf,
       }
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-%
-% \begin{macro}{\duckenumerate}
+% \begin{macro}{\duckenumerate}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckenumerate{\ducklist{enumerate}}
 %    \end{macrocode}
-% \end{macro}
-% \begin{macro}{\duckitemize}
+% \end{macro}^^A<<<
+% \begin{macro}{\duckitemize}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckitemize{\ducklist{itemize}}
 %    \end{macrocode}
-% \end{macro}
-% \begin{macro}{\duckdescription}
+% \end{macro}^^A<<<
+% \begin{macro}{\duckdescription}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckdescription{\ducklist{description}}
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckumentsCreateExampleFile}
+% \begin{macro}{\duckumentsCreateExampleFile}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckumentsCreateExampleFile
   {%>>>
@@ -620,9 +640,8 @@ and the derived files           duckuments.pdf,
     \iow_close:N \duckuments_example_file_iow
   }%<<<
 %    \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\duckumentsDrawRandomDucks}
+% \end{macro}^^A<<<
+% \begin{macro}{\duckumentsDrawRandomDucks}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckumentsDrawRandomDucks[1][\duckuments@randoms]
   {%>>>
@@ -637,10 +656,12 @@ and the derived files           duckuments.pdf,
       \end{tikzpicture}}
   }%<<<
 %    \end{macrocode}
-% \end{macro}
-% \subsubsection{Intern}
+% \end{macro}^^A<<<
+%^^A<<<
+%
+% \subsubsection{Intern}^^A>>>
 %
-% \begin{macro}{\duckuments@headings}
+% \begin{macro}{\duckuments@headings}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@headings[1]
   {%>>>
@@ -655,9 +676,9 @@ and the derived files           duckuments.pdf,
     {\duckuments@headings@text{#1}}
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments@headings@level}
+% \begin{macro}{\duckuments@headings@level}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@headings@level[1]
   {%>>>
@@ -672,23 +693,23 @@ and the derived files           duckuments.pdf,
     )
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments@ifinline}
+% \begin{macro}{\duckuments@ifinline}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@ifinline[2][]
   { \bool_if:NTF \l_duckuments_math_inline_bool { #2 } { #1 } }
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments@ifdisplay}
+% \begin{macro}{\duckuments@ifdisplay}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@ifdisplay[2][]
   { \bool_if:NTF \l_duckuments_math_display_bool { #2 } { #1 } }
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments_list_example:n}
+% \begin{macro}{\duckuments_list_example:n}^^A>>>
 %    \begin{macrocode}
 \cs_new_protected_nopar:Nn \duckuments_list_example:n
   {%>>>
@@ -698,9 +719,9 @@ and the derived files           duckuments.pdf,
     \ducklistlist { #1 }
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments@enquote}
+% \begin{macro}{\duckuments@enquote}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@enquote [1]
   {%>>>
@@ -709,9 +730,9 @@ and the derived files           duckuments.pdf,
       {``#1''}
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments_patch_includegraphics:}
+% \begin{macro}{\duckuments_patch_includegraphics:}^^A>>>
 %    \begin{macrocode}
 \cs_new_protected_nopar:Nn \duckuments_patch_includegraphics:
   {%>>>
@@ -721,7 +742,7 @@ and the derived files           duckuments.pdf,
         \RenewDocumentCommand \includegraphics
           { >{\duckuments_starred:n}s O{} m }
           {
-            \regex_match:NnTF \c_duckuments_regex { ##3 }
+            \regex_match:NnTF \c_duckuments_example_regex { ##3 }
               {
                 \duckuments_get_random_page:
                 \duckuments@includegraphicsBAK##1
@@ -735,9 +756,106 @@ and the derived files           duckuments.pdf,
       }
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments_starred:n}
+% \begin{macro}{\duckuments_blindduck_range_test:n}^^A>>>
+%    \begin{macrocode}
+\cs_new_protected:Nn \duckuments_blindduck_range_test:n
+  {%>>>
+    \regex_match:NnTF \c_duckuments_range_regex { #1 }
+      {
+        \seq_set_split:Nnn \l_duckuments_range_seq { - } { #1 }
+        \int_compare:nNnTF { 1 } = { \seq_count:N \l_duckuments_range_seq }
+          {
+            \cs_set:Npn \duckuments@blindduck@text
+              {
+                \duckuments_blindduck_single_par:n { #1 } 
+                \int_gset:Nn \g_duckuments_blindduck_start_int { #1 + \c_one }
+              }
+          }
+          {
+            \bool_set_true:N \l_duckuments_blindduck_pars_bool
+            \exp_args:Nx
+            \tl_if_empty:nF { \seq_item:Nn \l_duckuments_range_seq { \c_one } }
+              {
+                \int_gset:Nn \g_duckuments_blindduck_start_int
+                  { \seq_item:Nn \l_duckuments_range_seq { \c_one } }
+              }
+            \exp_args:Nx
+            \tl_if_empty:nTF { \seq_item:Nn \l_duckuments_range_seq { \c_two } }
+              {
+                \int_gset_eq:NN
+                  \g_duckuments_blindduck_end_int
+                  \g_duckuments_blindduck_start_int
+              }
+              {
+                \int_set:Nn \g_duckuments_blindduck_end_int
+                  { \seq_item:Nn \l_duckuments_range_seq { \c_two } }
+              }
+            \duckuments_blindduck_set_text:xx
+              { \int_use:N \g_duckuments_blindduck_start_int }
+              { \int_use:N \g_duckuments_blindduck_end_int }
+          }
+      }
+      {
+        \group_begin:
+          \exp_args:NnnV
+            \msg_error:nnn { duckuments } { option~unknown } \l_keys_key_tl
+        \group_end:
+      }
+  }%<<<
+\cs_generate_variant:Nn \duckuments_blindduck_range_test:n { V }
+%    \end{macrocode}
+% \end{macro}^^A<<<
+%
+% \begin{macro}{\duckuments_blindduck_set_text:nn}^^A>>>
+%    \begin{macrocode}
+\cs_new:Nn \duckuments_blindduck_set_text:nn
+  {%>>>
+    \def \duckuments@blindduck@text
+      {
+        \int_step_function:nnnN { #1 } { \c_one } { #2 }
+          \duckuments_blindduck_par_loop:n
+        \int_gset:Nn \g_duckuments_blindduck_start_int { #2 + \c_one }
+      }
+  }%<<<
+\cs_generate_variant:Nn \duckuments_blindduck_set_text:nn { xx }
+%    \end{macrocode}
+% \end{macro}^^A<<<
+%
+% \begin{macro}{\duckuments_blindduck_single_par:n}^^A>>>
+%    \begin{macrocode}
+\cs_new:Nn \duckuments_blindduck_single_par:n
+  {%>>>
+    \bool_if:nTF
+      {
+        \int_compare_p:nNn { #1 } > { \c_duckuments_blindduck_pars_int }
+        || \int_compare_p:nNn { #1 } < { \c_one }
+      }
+      {
+        \msg_error:nnxxxx { duckuments } { out~of~range }
+          { 1 } { \int_use:N \c_duckuments_blindduck_pars_int } { #1 }
+          { blindduck~paragraphs }
+        \duckuments@blindduck@text@i
+      }
+      {
+        \use:c { duckuments@blindduck@text@ \int_to_roman:n { #1 } }
+      }
+  }%<<<
+%    \end{macrocode}
+% \end{macro}^^A<<<
+%
+% \begin{macro}{\duckuments_blindduck_par_loop:n}^^A>>>
+%    \begin{macrocode}
+\cs_new:Nn \duckuments_blindduck_par_loop:n
+  {%>>>
+    \duckuments_blindduck_single_par:n { #1 }
+    \par
+  }%<<<
+%    \end{macrocode}
+% \end{macro}^^A<<<
+%
+% \begin{macro}{\duckuments_starred:n}^^A>>>
 %    \begin{macrocode}
 \cs_new_protected:Nn \duckuments_starred:n
   {%>>>
@@ -746,15 +864,142 @@ and the derived files           duckuments.pdf,
       { \def\ProcessedArgument{} } 
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
+%
+% \begin{macro}{\duckuments_get_random_page:, \duckuments_random_page:}^^A>>>
+%    \begin{macrocode}
+\sys_if_engine_xetex:TF
+  {
+%    \end{macrocode}
+% For \XeTeX\ we need a bit more code in order to get random numbers. The
+% following is an implementation of RC4. First declare some variables:
+%    \begin{macrocode}
+    \int_new:N \g_duckuments_RCiv_i_int
+    \int_new:N \g_duckuments_RCiv_j_int
+    \int_new:N \g_duckuments_RCiv_keylength_int
+    \int_new:N \g_duckuments_tmpa_int
+    \int_const:Nn \c_duckuments_RCiv_Slength_int { 256 }
+    \tl_new:N \l_duckuments_tmpa_tl
+    \tl_new:N \l_duckuments_tmpb_tl
+%    \end{macrocode}
+% Initialize the S array:
+%    \begin{macrocode}
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_S_new:n
+      { \int_new:c { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int } }
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_S_set:nn
+      { \int_gset:cn { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int } { #2 } }
+    \cs_new_nopar:Nn \duckuments_RCiv_S_get:n
+      { \int_use:c { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int } }
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_key_new:n
+      { \int_new:c { g_duckuments_RCiv_key_ \int_eval:n { #1 } _int } }
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_key_set:nn
+      { \int_gset:cn { g_duckuments_RCiv_key_ \int_eval:n { #1 } _int } { #2 } }
+    \cs_new_nopar:Nn \duckuments_RCiv_key_get:n
+      { \int_use:c { g_duckuments_RCiv_key_ \int_eval:n { #1 } _int } }
+    \int_step_inline:nnnn { 0 } { 1 } { 255 }
+      {
+        \duckuments_RCiv_S_new:n { #1 }
+        \duckuments_RCiv_S_set:nn { #1 } { #1 }
+      }
+    \int_step_inline:nnnn { 0 } { 1 } { 4 }
+      { \duckuments_RCiv_key_new:n { #1 } }
+    \duckuments_RCiv_key_set:nn { 0 } { \c_sys_minute_int }
+    \duckuments_RCiv_key_set:nn { 1 } { \c_sys_hour_int }
+    \duckuments_RCiv_key_set:nn { 2 } { \c_sys_day_int }
+    \duckuments_RCiv_key_set:nn { 3 } { \c_sys_month_int }
+    \duckuments_RCiv_key_set:nn { 4 }
+      { \int_mod:nn { \c_sys_year_int } { \c_duckuments_RCiv_Slength_int } }
+    \int_gset:Nn \g_duckuments_RCiv_keylength_int { 5 }
+    \str_map_inline:Nn \c_sys_jobname_str
+      {
+        \duckuments_RCiv_key_new:n { \g_duckuments_RCiv_keylength_int }
+        \duckuments_RCiv_key_set:nn
+          { \g_duckuments_RCiv_keylength_int }
+          { \int_from_alph:n { #1 } }
+        \int_gincr:N \g_duckuments_RCiv_keylength_int
+      }
+    \cs_new_protected_nopar:Nn \duckuments_swap_S_entries:nn
+      {
+        \int_set_eq:Nc
+          \g_duckuments_tmpa_int
+          { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int }
+        \int_set_eq:cc
+          { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int }
+          { g_duckuments_RCiv_S_ \int_eval:n { #2 } _int }
+        \int_set_eq:cN
+          { g_duckuments_RCiv_S_ \int_eval:n { #2 } _int }
+          \g_duckuments_tmpa_int
+      }
+    \int_gset:Nn \g_duckuments_RCiv_keylength_int { 5 }
+    \cs_new:Nn \duckuments_gadd_mod:Nnn
+      { \int_gset:Nn #1 { \int_mod:nn { #1 + ( #2 ) } { #3 } } }
+    \cs_new:Nn \duckuments_gadd_mod_Slength:Nn
+      {
+        \duckuments_gadd_mod:Nnn #1
+          { #2 } { \c_duckuments_RCiv_Slength_int }
+      }
+    \int_step_inline:nnnn { 0 } { 1 } { 255 }
+      {
+        \int_gset:Nn \g_duckuments_tmpa_int
+          { \int_mod:nn { #1 } { \g_duckuments_RCiv_keylength_int } }
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
+          { 
+            \duckuments_RCiv_S_get:n { #1 }
+            + \duckuments_RCiv_key_get:n { \g_duckuments_tmpa_int }
+          }
+        \duckuments_swap_S_entries:nn { #1 } { \g_duckuments_RCiv_j_int }
+      }
+    \int_gzero:N \g_duckuments_RCiv_i_int
+    \int_gzero:N \g_duckuments_RCiv_j_int
+%    \end{macrocode}
+% Provide a function which gets the next random number and sets
+% |\duckuments_random_page:| to it.
+%    \begin{macrocode}
+    \cs_new_protected_nopar:Nn \duckuments_get_random_page:
+      {
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_i_int { \c_one } 
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
+          { \duckuments_RCiv_S_get:n { \g_duckuments_RCiv_i_int } }
+        \duckuments_swap_S_entries:nn
+          { \g_duckuments_RCiv_i_int }
+          { \g_duckuments_RCiv_j_int }
+        \int_gset:Nn \g_duckuments_tmpa_int
+          { \duckuments_RCiv_S_get:n { \g_duckuments_RCiv_i_int } }
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_tmpa_int
+          { \duckuments_RCiv_S_get:n { \g_duckuments_RCiv_j_int } }
+        \cs_set:Nx \duckuments_random_page:
+          {
+            \int_eval:n
+              {
+                \int_mod:nn
+                  { \duckuments_RCiv_S_get:n { \g_duckuments_tmpa_int } }
+                  { \c_duckuments_example_pages_int }
+                + \c_one
+              }
+          }
+      }
+    \cs_new:Nn \duckuments_random_page: { 1 }
+  }
+%    \end{macrocode}
+% Both \pdfTeX\ and \LuaTeX\ don't need the RC4 as there |\int_random:nn| is
+% available.
+%    \begin{macrocode}
+  {
+    \cs_new:Nn \duckuments_get_random_page: {}
+    \cs_new:Nn \duckuments_random_page:
+      { \int_rand:nn { 1 } { \c_duckuments_example_pages_int } }
+  }
+%    \end{macrocode}
+% \end{macro}^^A<<<
 %
 %    \begin{macrocode}
 \ExplSyntaxOff
 %    \end{macrocode}
 %
-% \begin{macro}{\duckuments@blindduck@text}
+% \begin{macro}{\duckuments@blindduck@text}^^A>>>
 %    \begin{macrocode}
-\newcommand*\duckuments@blindduck@text
+\newcommand*\duckuments@blindduck@text{\duckuments@blindduck@text@i}
+\newcommand*\duckuments@blindduck@text@i
   {%>>>
     There once was a very smart but sadly blind duck. When it was still a small
     duckling it was renowned for its good vision. But sadly as the duck grew
@@ -768,17 +1013,44 @@ and the derived files           duckuments.pdf,
     \duckuments@enquote{Go, find me the best eye ducktor there is. He shall
     heal me from my disease!}%
   }%<<<
+\newcommand*\duckuments@blindduck@text@ii
+  {%>>>
+    \duckuments@enquote{But my duck, how are you supposed to manage your daily
+    routines without my visual guidance}, replied the underduckling. The smart
+    duck's face turned grim in anger. \duckuments@enquote{You dare to talk
+    back?} The underduckling blushed ashamed. How could he have objections
+    after his duck gave strict orders? The underduckling was so embarrassed
+    about his own behaviour he had to solve an equation.%
+  }%<<<
+\newcommand*\duckuments@blindduck@text@iii
+  {%>>>
+    After the equation was solved and the underduckling prepared his leave for
+    the next day it fell asleep in a shaky mood. It did not know what the
+    journey had prepared for him and if he was prepared enough for it. His sleep
+    was restless. The dreams he had that night were not calm and bright as they
+    used to be for an innocent underduckling.%
+  }%<<<
+\newcommand*\duckuments@blindduck@text@iv
+  {%>>>
+    Before the first sunlight the underduckling woke. He didn't have the feeling
+    of being well rested. But nonetheless he knew that this was the day he
+    should leave. Except saying goodbye to his beloved ones there was nothing
+    holding him back. His duck had sent him on the most important mission a five
+    weeks old inexperienced underduckling was ever sent. He bid farewell to his
+    mother, all his brothers and sisters, and finally from his duck. The bag was
+    shouldered, the boots were tied, the underduckling left.%
+  }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments@headings@text}
+% \begin{macro}{\duckuments@headings@text}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@headings@text[1]
   {A friendly duck at level #1 \duckuments@headings@level{#1}}
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\ducklists@content}
+% \begin{macro}{\ducklists@content}^^A>>>
 %    \begin{macrocode}
 \newcommand*\ducklists@content
   {%>>>
@@ -788,9 +1060,9 @@ and the derived files           duckuments.pdf,
     \item And over there bathes uncle canard
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\ducklists@content@starred}
+% \begin{macro}{\ducklists@content@starred}^^A>>>
 %    \begin{macrocode}
 \newcommand*\ducklists@content@starred
   {%>>>
@@ -800,9 +1072,9 @@ and the derived files           duckuments.pdf,
     \item[canard] is the bathing uncle
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments@listlist}
+% \begin{macro}{\duckuments@listlist}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@listlist[1]
   {%>>>
@@ -824,9 +1096,9 @@ and the derived files           duckuments.pdf,
     \end{#1}%
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
 %
-% \begin{macro}{\duckuments@listlist@starred}
+% \begin{macro}{\duckuments@listlist@starred}^^A>>>
 %    \begin{macrocode}
 \newcommand*\duckuments@listlist@starred[1]
   {%>>>
@@ -848,16 +1120,22 @@ and the derived files           duckuments.pdf,
     \end{#1}%
   }%<<<
 %    \end{macrocode}
-% \end{macro}
+% \end{macro}^^A<<<
+%^^A<<<
+%^^A<<<
 %
 %    \begin{macrocode}
 \endinput
 %    \end{macrocode}
 %
-% \end{implementation}
+% \end{implementation}^^A<<<
 %
 %    \begin{macrocode}
 %</pkg>
 %    \end{macrocode}
 %
-%^^A vim: fdm=marker foldmarker=>>>,<<<
+% \section{The story of the duck}^^A>>>
+%
+% \blindduck[full]^^A<<<
+%
+^^A vim: fdm=marker foldmarker=>>>,<<<
diff --git a/Master/texmf-dist/tex/latex/duckuments/duckuments.sty b/Master/texmf-dist/tex/latex/duckuments/duckuments.sty
index 52ad43ad908..1e3d18eed81 100644
--- a/Master/texmf-dist/tex/latex/duckuments/duckuments.sty
+++ b/Master/texmf-dist/tex/latex/duckuments/duckuments.sty
@@ -31,8 +31,8 @@
 %%                                 example-image-duck.tex
 %% 
 \RequirePackage{xparse,letltxmacro,l3keys2e}
-\def\duckuments@version{v0.2}
-\def\duckuments@date{2018/03/14}
+\def\duckuments@version{v0.3}
+\def\duckuments@date{2018/03/19}
 \ProvidesExplPackage
   {duckuments}          {\duckuments@date}
   {\duckuments@version} {minimal working duckuments}
@@ -81,153 +81,110 @@
 \bool_new:N \l_duckuments_toc_bool
 \bool_new:N \l_duckuments_math_inline_bool
 \bool_new:N \l_duckuments_math_display_bool
-\regex_const:Nn \c_duckuments_regex
+\bool_new:N \l_duckuments_blindduck_pars_bool
+\seq_new:N \l_duckuments_range_seq
+\int_new:N \g_duckuments_blindduck_start_int
+\int_gset:Nn \g_duckuments_blindduck_start_int { \c_one }
+\int_new:N \g_duckuments_blindduck_end_int
+\regex_const:Nn \c_duckuments_example_regex
   { example-image-duck|example-image-duck.pdf }
+\regex_const:Nn \c_duckuments_range_regex { (\d+|\d+-|-\d+|\d+-\d+|-) }
+\int_const:Nn \c_duckuments_blindduck_pars_int { \c_five }
 \str_if_eq:VnF \c_sys_jobname_str { example-image-duck }
-{\file_if_exist:nTF { example-image-duck.pdf }
   {
-    \sys_if_engine_pdftex:T
+    \file_if_exist:nTF { example-image-duck.pdf }
       {
-        \pdfximage{example-image-duck.pdf}
-        \int_const:Nn \c_duckuments_example_pages_int
-          { \the\pdflastximagepages }
-      }
-    \sys_if_engine_luatex:T
-      {
-        \saveimageresource{example-image-duck.pdf}
-        \int_const:Nn \c_duckuments_example_pages_int
-          { \lastsavedimageresourcepages }
-      }
-    \sys_if_engine_xetex:TF
-      {
-        \int_set:Nn \l_tmpa_int { \XeTeXpdfpagecount "example-image-duck.pdf" }
-        \int_const:Nn \c_duckuments_example_pages_int { \l_tmpa_int }
-        \int_new:N \g_duckuments_RCiv_i_int
-        \int_new:N \g_duckuments_RCiv_j_int
-        \int_new:N \g_duckuments_RCiv_keylength_int
-        \int_new:N \g_duckuments_tmpa_int
-        \int_const:Nn \c_duckuments_RCiv_Slength_int { 256 }
-        \tl_new:N \l_duckuments_tmpa_tl
-        \tl_new:N \l_duckuments_tmpb_tl
-        \cs_generate_variant:Nn \prop_gput:Nnn { Nxx }
-        \cs_generate_variant:Nn \prop_get:NnN { NxN }
-        \prop_new:N \g_duckuments_RCiv_S_prop
-        \int_step_inline:nnnn { 0 } { 1 } { 255 }
-          {
-            \prop_gput:Nnn \g_duckuments_RCiv_S_prop { #1 } { #1 }
-          }
-        \prop_new:N \g_duckuments_RCiv_key_prop
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 0 } { \int_use:N \c_sys_minute_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 1 } { \c_sys_hour_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 2 } { \c_sys_day_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 3 } { \c_sys_month_int }
-        \prop_gput:Nnx \g_duckuments_RCiv_key_prop
-          { 4 } { \int_eval:n {  \int_mod:nn { \c_sys_year_int } { 256 } } }
-        \int_gset:Nn \g_duckuments_RCiv_keylength_int { 5 }
-        \str_map_inline:Nn \c_sys_jobname_str
-          {
-            \prop_gput:Nxx \g_duckuments_RCiv_key_prop
-              { \int_use:N \g_duckuments_RCiv_keylength_int }
-              { \int_from_alph:n { #1 } }
-            \int_gadd:Nn \g_duckuments_RCiv_keylength_int { 1 }
-          }
-        \cs_new:Nn \duckuments_swap_prop_entries:Nnn
-          {
-            \prop_get:NnN #1 { #2 } \l_duckuments_tmpa_tl
-            \prop_get:NnN #1 { #3 } \l_duckuments_tmpb_tl
-            \prop_gput:Nnx #1 { #2 } { \l_duckuments_tmpb_tl }
-            \prop_gput:Nnx #1 { #3 } { \l_duckuments_tmpa_tl }
-          }
-        \cs_generate_variant:Nn \duckuments_swap_prop_entries:Nnn { Nxx }
-        \cs_new:Nn \duckuments_gadd_mod:Nnn
+        \sys_if_engine_pdftex:T
           {
-            \int_gset:Nn #1 { \int_mod:nn { #1 + #2 } { #3 } }
+            \pdfximage{example-image-duck.pdf}
+            \int_const:Nn \c_duckuments_example_pages_int
+              { \the\pdflastximagepages }
           }
-        \cs_generate_variant:Nn \duckuments_gadd_mod:Nnn { Nxn }
-        \cs_new:Nn \duckuments_gadd_mod_Slength:Nn
+        \sys_if_engine_luatex:T
           {
-            \duckuments_gadd_mod:Nnn #1
-              { #2 } { \c_duckuments_RCiv_Slength_int }
-          }
-        \int_step_inline:nnnn { 0 } { 1 } { 255 }
-          {
-            \prop_get:NnN \g_duckuments_RCiv_S_prop { #1 } \l_duckuments_tmpa_tl
-            \int_gset:Nn \g_duckuments_tmpa_int
-              {
-                \int_mod:nn
-                  { #1 }
-                  { \g_duckuments_RCiv_keylength_int }
-              }
-            \prop_get:NxN \g_duckuments_RCiv_key_prop
-              { \int_use:N \g_duckuments_tmpa_int } \l_duckuments_tmpb_tl
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
-              { \l_duckuments_tmpa_tl + \l_duckuments_tmpb_tl }
-            \duckuments_swap_prop_entries:Nxx \g_duckuments_RCiv_S_prop
-              { #1 } { \int_use:N \g_duckuments_RCiv_j_int }
+            \saveimageresource{example-image-duck.pdf}
+            \int_const:Nn \c_duckuments_example_pages_int
+              { \lastsavedimageresourcepages }
           }
-        \int_gzero:N \g_duckuments_RCiv_i_int
-        \int_gzero:N \g_duckuments_RCiv_j_int
-        \cs_new:Nn \duckuments_get_random_page:
+        \sys_if_engine_xetex:T
           {
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_i_int { \c_one }
-            \prop_get:NxN \g_duckuments_RCiv_S_prop
-              { \int_use:N \g_duckuments_RCiv_i_int } \l_duckuments_tmpa_tl
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
-              { \l_duckuments_tmpa_tl }
-            \duckuments_swap_prop_entries:Nxx \g_duckuments_RCiv_S_prop
-              { \int_use:N \g_duckuments_RCiv_i_int }
-              { \int_use:N \g_duckuments_RCiv_j_int }
-            \int_gset:Nn \g_duckuments_tmpa_int { \l_duckuments_tmpa_tl }
-            \duckuments_gadd_mod_Slength:Nn \g_duckuments_tmpa_int
-              { \l_duckuments_tmpb_tl }
-            \prop_get:NxN \g_duckuments_RCiv_S_prop
-              { \int_use:N \g_duckuments_tmpa_int } \l_duckuments_tmpa_tl
-            \int_gset:Nn \g_duckuments_tmpa_int
-              {
-                \int_mod:nn
-                  { \l_duckuments_tmpa_tl } { \c_duckuments_example_pages_int }
-                + \c_one
-              }
-            \cs_set:Nx \duckuments_random_page:
-              { \int_use:N \g_duckuments_tmpa_int }
+            \group_begin:
+              \int_gset:Nn \l_tmpa_int
+                { \XeTeXpdfpagecount "example-image-duck.pdf" }
+              \int_const:Nn \c_duckuments_example_pages_int { \l_tmpa_int }
+            \group_end:
           }
-        \cs_new:Nn \duckuments_random_page: { 1 }
-      }
-      {
-        \cs_new:Nn \duckuments_get_random_page: {}
-        \cs_new:Nn \duckuments_random_page:
-          { \int_rand:nn { 1 } { \c_duckuments_example_pages_int } }
       }
-  }}
+  }
+  { \int_const:Nn \c_duckuments_example_pages_int { 1 } }
+\msg_new:nnnn { duckuments } { option~unknown }
+  {
+    Unknown~option~'#1'~for~package~duckuments.
+  }
+  {
+    \ ~__________________________________\\
+    \ (Quack!~Nothing~here,~sorry.~Quack!)\\
+    \ ~""""""""""""""""""""""""""""""""""\\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\string\ \\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~>()_\\
+    \ \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~(__)__
+  }
+\msg_new:nnnn { duckuments } { out~of~range }
+  {
+    You~requested~element~#3~out~of~the~range~#1~to~#2~of~array~'#4'.\\
+    I'll~just~use~element~#1~for~you.
+  }
   {
-    \int_const:Nn \c_duckuments_example_pages_int { 1 }
+    \ ~__________________________________\\
+    \ (Quack!~Nothing~here,~sorry.~Quack!)\\
+    \ ~""""""""""""""""""""""""""""""""""\\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\string\ \\
+    \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~>()_\\
+    \ \ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~\ ~(__)__
   }
+\cs_new:Nn \duckuments_patch_see_duckumentation:
+  {%>>>
+    \cs_set:Nn \msg_see_documentation_text:n
+      {
+        \\\\
+        See~the~\str_if_eq:nnTF { ##1 } { LaTeX } { LaTeX3~documentation }
+          {
+            \str_if_eq:nnTF { ##1 } { duckuments } { duckumentation }
+              { ##1~documentation }
+          }~for~further~information.
+      }
+  }%<<<
+\duckuments_patch_see_duckumentation:
 \keys_define:nn { duckuments }
   {%>>>
-    ,toc   .bool_set:N = \l_duckuments_toc_bool
-    ,toc   .default:n = true
+    ,immediate .bool_set:N = \l_duckuments_immediate_bool
+    ,immediate .default:n = true
+    ,full .code:n =
+      \duckuments_blindduck_range_test:n { 1-\c_duckuments_blindduck_pars_int }
     ,maths .choice:
     ,maths / both    .code:n =
       {
         \bool_set_true:N \l_duckuments_math_inline_bool
         \bool_set_true:N \l_duckuments_math_display_bool
       }
+    ,maths / display .code:n = \bool_set_true:N \l_duckuments_math_display_bool
+    ,maths / inline  .code:n = \bool_set_true:N \l_duckuments_math_inline_bool
     ,maths / none    .code:n =
       {
         \bool_set_false:N \l_duckuments_math_inline_bool
         \bool_set_false:N \l_duckuments_math_display_bool
       }
-    ,maths / inline  .code:n = \bool_set_true:N \l_duckuments_math_inline_bool
-    ,maths / display .code:n = \bool_set_true:N \l_duckuments_math_display_bool
     ,maths .default:n = both
-    ,immediate .bool_set:N = \l_duckuments_immediate_bool
-    ,immediate .default:n = true
+    ,toc   .bool_set:N = \l_duckuments_toc_bool
+    ,toc   .default:n = true
+    ,unknown .code:n =
+      { \msg_error:nnx { duckuments } { option~unknown } { \l_keys_key_tl } }
   }%<<<
 \ProcessKeysOptions { duckuments }
+\keys_define:nn { duckuments }
+  {%>>>
+    unknown .code:n = \duckuments_blindduck_range_test:V \l_keys_key_tl
+  }%<<<
 \bool_if:NTF \l_duckuments_immediate_bool
   { \AtEndOfPackage { \duckuments_patch_includegraphics: } }
   { \AtBeginDocument { \duckuments_patch_includegraphics: } }
@@ -253,6 +210,7 @@
     \group_begin:
     \keys_set:nn { duckuments } { #1 }
     \duckuments@blindduck@text
+    \bool_if:NT \l_duckuments_blindduck_pars_bool { \par }
     \group_end:
   }%<<<
 \NewDocumentCommand \ducklist {s m}
@@ -359,7 +317,7 @@
         \RenewDocumentCommand \includegraphics
           { >{\duckuments_starred:n}s O{} m }
           {
-            \regex_match:NnTF \c_duckuments_regex { ##3 }
+            \regex_match:NnTF \c_duckuments_example_regex { ##3 }
               {
                 \duckuments_get_random_page:
                 \duckuments@includegraphicsBAK##1
@@ -372,14 +330,198 @@
           }
       }
   }%<<<
+\cs_new_protected:Nn \duckuments_blindduck_range_test:n
+  {%>>>
+    \regex_match:NnTF \c_duckuments_range_regex { #1 }
+      {
+        \seq_set_split:Nnn \l_duckuments_range_seq { - } { #1 }
+        \int_compare:nNnTF { 1 } = { \seq_count:N \l_duckuments_range_seq }
+          {
+            \cs_set:Npn \duckuments@blindduck@text
+              {
+                \duckuments_blindduck_single_par:n { #1 }
+                \int_gset:Nn \g_duckuments_blindduck_start_int { #1 + \c_one }
+              }
+          }
+          {
+            \bool_set_true:N \l_duckuments_blindduck_pars_bool
+            \exp_args:Nx
+            \tl_if_empty:nF { \seq_item:Nn \l_duckuments_range_seq { \c_one } }
+              {
+                \int_gset:Nn \g_duckuments_blindduck_start_int
+                  { \seq_item:Nn \l_duckuments_range_seq { \c_one } }
+              }
+            \exp_args:Nx
+            \tl_if_empty:nTF { \seq_item:Nn \l_duckuments_range_seq { \c_two } }
+              {
+                \int_gset_eq:NN
+                  \g_duckuments_blindduck_end_int
+                  \g_duckuments_blindduck_start_int
+              }
+              {
+                \int_set:Nn \g_duckuments_blindduck_end_int
+                  { \seq_item:Nn \l_duckuments_range_seq { \c_two } }
+              }
+            \duckuments_blindduck_set_text:xx
+              { \int_use:N \g_duckuments_blindduck_start_int }
+              { \int_use:N \g_duckuments_blindduck_end_int }
+          }
+      }
+      {
+        \group_begin:
+          \exp_args:NnnV
+            \msg_error:nnn { duckuments } { option~unknown } \l_keys_key_tl
+        \group_end:
+      }
+  }%<<<
+\cs_generate_variant:Nn \duckuments_blindduck_range_test:n { V }
+\cs_new:Nn \duckuments_blindduck_set_text:nn
+  {%>>>
+    \def \duckuments@blindduck@text
+      {
+        \int_step_function:nnnN { #1 } { \c_one } { #2 }
+          \duckuments_blindduck_par_loop:n
+        \int_gset:Nn \g_duckuments_blindduck_start_int { #2 + \c_one }
+      }
+  }%<<<
+\cs_generate_variant:Nn \duckuments_blindduck_set_text:nn { xx }
+\cs_new:Nn \duckuments_blindduck_single_par:n
+  {%>>>
+    \bool_if:nTF
+      {
+        \int_compare_p:nNn { #1 } > { \c_duckuments_blindduck_pars_int }
+        || \int_compare_p:nNn { #1 } < { \c_one }
+      }
+      {
+        \msg_error:nnxxxx { duckuments } { out~of~range }
+          { 1 } { \int_use:N \c_duckuments_blindduck_pars_int } { #1 }
+          { blindduck~paragraphs }
+        \duckuments@blindduck@text@i
+      }
+      {
+        \use:c { duckuments@blindduck@text@ \int_to_roman:n { #1 } }
+      }
+  }%<<<
+\cs_new:Nn \duckuments_blindduck_par_loop:n
+  {%>>>
+    \duckuments_blindduck_single_par:n { #1 }
+    \par
+  }%<<<
 \cs_new_protected:Nn \duckuments_starred:n
   {%>>>
     \IfBooleanTF { #1 }
       { \def\ProcessedArgument{*} }
       { \def\ProcessedArgument{} }
   }%<<<
+\sys_if_engine_xetex:TF
+  {
+    \int_new:N \g_duckuments_RCiv_i_int
+    \int_new:N \g_duckuments_RCiv_j_int
+    \int_new:N \g_duckuments_RCiv_keylength_int
+    \int_new:N \g_duckuments_tmpa_int
+    \int_const:Nn \c_duckuments_RCiv_Slength_int { 256 }
+    \tl_new:N \l_duckuments_tmpa_tl
+    \tl_new:N \l_duckuments_tmpb_tl
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_S_new:n
+      { \int_new:c { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int } }
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_S_set:nn
+      { \int_gset:cn { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int } { #2 } }
+    \cs_new_nopar:Nn \duckuments_RCiv_S_get:n
+      { \int_use:c { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int } }
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_key_new:n
+      { \int_new:c { g_duckuments_RCiv_key_ \int_eval:n { #1 } _int } }
+    \cs_new_protected_nopar:Nn \duckuments_RCiv_key_set:nn
+      { \int_gset:cn { g_duckuments_RCiv_key_ \int_eval:n { #1 } _int } { #2 } }
+    \cs_new_nopar:Nn \duckuments_RCiv_key_get:n
+      { \int_use:c { g_duckuments_RCiv_key_ \int_eval:n { #1 } _int } }
+    \int_step_inline:nnnn { 0 } { 1 } { 255 }
+      {
+        \duckuments_RCiv_S_new:n { #1 }
+        \duckuments_RCiv_S_set:nn { #1 } { #1 }
+      }
+    \int_step_inline:nnnn { 0 } { 1 } { 4 }
+      { \duckuments_RCiv_key_new:n { #1 } }
+    \duckuments_RCiv_key_set:nn { 0 } { \c_sys_minute_int }
+    \duckuments_RCiv_key_set:nn { 1 } { \c_sys_hour_int }
+    \duckuments_RCiv_key_set:nn { 2 } { \c_sys_day_int }
+    \duckuments_RCiv_key_set:nn { 3 } { \c_sys_month_int }
+    \duckuments_RCiv_key_set:nn { 4 }
+      { \int_mod:nn { \c_sys_year_int } { \c_duckuments_RCiv_Slength_int } }
+    \int_gset:Nn \g_duckuments_RCiv_keylength_int { 5 }
+    \str_map_inline:Nn \c_sys_jobname_str
+      {
+        \duckuments_RCiv_key_new:n { \g_duckuments_RCiv_keylength_int }
+        \duckuments_RCiv_key_set:nn
+          { \g_duckuments_RCiv_keylength_int }
+          { \int_from_alph:n { #1 } }
+        \int_gincr:N \g_duckuments_RCiv_keylength_int
+      }
+    \cs_new_protected_nopar:Nn \duckuments_swap_S_entries:nn
+      {
+        \int_set_eq:Nc
+          \g_duckuments_tmpa_int
+          { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int }
+        \int_set_eq:cc
+          { g_duckuments_RCiv_S_ \int_eval:n { #1 } _int }
+          { g_duckuments_RCiv_S_ \int_eval:n { #2 } _int }
+        \int_set_eq:cN
+          { g_duckuments_RCiv_S_ \int_eval:n { #2 } _int }
+          \g_duckuments_tmpa_int
+      }
+    \int_gset:Nn \g_duckuments_RCiv_keylength_int { 5 }
+    \cs_new:Nn \duckuments_gadd_mod:Nnn
+      { \int_gset:Nn #1 { \int_mod:nn { #1 + ( #2 ) } { #3 } } }
+    \cs_new:Nn \duckuments_gadd_mod_Slength:Nn
+      {
+        \duckuments_gadd_mod:Nnn #1
+          { #2 } { \c_duckuments_RCiv_Slength_int }
+      }
+    \int_step_inline:nnnn { 0 } { 1 } { 255 }
+      {
+        \int_gset:Nn \g_duckuments_tmpa_int
+          { \int_mod:nn { #1 } { \g_duckuments_RCiv_keylength_int } }
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
+          {
+            \duckuments_RCiv_S_get:n { #1 }
+            + \duckuments_RCiv_key_get:n { \g_duckuments_tmpa_int }
+          }
+        \duckuments_swap_S_entries:nn { #1 } { \g_duckuments_RCiv_j_int }
+      }
+    \int_gzero:N \g_duckuments_RCiv_i_int
+    \int_gzero:N \g_duckuments_RCiv_j_int
+    \cs_new_protected_nopar:Nn \duckuments_get_random_page:
+      {
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_i_int { \c_one }
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_RCiv_j_int
+          { \duckuments_RCiv_S_get:n { \g_duckuments_RCiv_i_int } }
+        \duckuments_swap_S_entries:nn
+          { \g_duckuments_RCiv_i_int }
+          { \g_duckuments_RCiv_j_int }
+        \int_gset:Nn \g_duckuments_tmpa_int
+          { \duckuments_RCiv_S_get:n { \g_duckuments_RCiv_i_int } }
+        \duckuments_gadd_mod_Slength:Nn \g_duckuments_tmpa_int
+          { \duckuments_RCiv_S_get:n { \g_duckuments_RCiv_j_int } }
+        \cs_set:Nx \duckuments_random_page:
+          {
+            \int_eval:n
+              {
+                \int_mod:nn
+                  { \duckuments_RCiv_S_get:n { \g_duckuments_tmpa_int } }
+                  { \c_duckuments_example_pages_int }
+                + \c_one
+              }
+          }
+      }
+    \cs_new:Nn \duckuments_random_page: { 1 }
+  }
+  {
+    \cs_new:Nn \duckuments_get_random_page: {}
+    \cs_new:Nn \duckuments_random_page:
+      { \int_rand:nn { 1 } { \c_duckuments_example_pages_int } }
+  }
 \ExplSyntaxOff
-\newcommand*\duckuments@blindduck@text
+\newcommand*\duckuments@blindduck@text{\duckuments@blindduck@text@i}
+\newcommand*\duckuments@blindduck@text@i
   {%>>>
     There once was a very smart but sadly blind duck. When it was still a small
     duckling it was renowned for its good vision. But sadly as the duck grew
@@ -393,6 +535,33 @@
     \duckuments@enquote{Go, find me the best eye ducktor there is. He shall
     heal me from my disease!}%
   }%<<<
+\newcommand*\duckuments@blindduck@text@ii
+  {%>>>
+    \duckuments@enquote{But my duck, how are you supposed to manage your daily
+    routines without my visual guidance}, replied the underduckling. The smart
+    duck's face turned grim in anger. \duckuments@enquote{You dare to talk
+    back?} The underduckling blushed ashamed. How could he have objections
+    after his duck gave strict orders? The underduckling was so embarrassed
+    about his own behaviour he had to solve an equation.%
+  }%<<<
+\newcommand*\duckuments@blindduck@text@iii
+  {%>>>
+    After the equation was solved and the underduckling prepared his leave for
+    the next day it fell asleep in a shaky mood. It did not know what the
+    journey had prepared for him and if he was prepared enough for it. His sleep
+    was restless. The dreams he had that night were not calm and bright as they
+    used to be for an innocent underduckling.%
+  }%<<<
+\newcommand*\duckuments@blindduck@text@iv
+  {%>>>
+    Before the first sunlight the underduckling woke. He didn't have the feeling
+    of being well rested. But nonetheless he knew that this was the day he
+    should leave. Except saying goodbye to his beloved ones there was nothing
+    holding him back. His duck had sent him on the most important mission a five
+    weeks old inexperienced underduckling was ever sent. He bid farewell to his
+    mother, all his brothers and sisters, and finally from his duck. The bag was
+    shouldered, the boots were tied, the underduckling left.%
+  }%<<<
 \newcommand*\duckuments@headings@text[1]
   {A friendly duck at level #1 \duckuments@headings@level{#1}}
 \newcommand*\ducklists@content
diff --git a/Master/texmf-dist/tex/latex/duckuments/example-image-duck.pdf b/Master/texmf-dist/tex/latex/duckuments/example-image-duck.pdf
index d602328399f..8b3fa4d07a7 100644
--- a/Master/texmf-dist/tex/latex/duckuments/example-image-duck.pdf
+++ b/Master/texmf-dist/tex/latex/duckuments/example-image-duck.pdf