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+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
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+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/macros/latex/contrib/gfdl/README.txt b/macros/latex/contrib/gfdl/README.txt
new file mode 100644
index 0000000000..8c0a103b19
--- /dev/null
+++ b/macros/latex/contrib/gfdl/README.txt
@@ -0,0 +1,8 @@
+-------------------------------------------------------------
+Package: gfdl
+Version: v0.1 (January 1, 2023)
+Author: निरंजन
+Description: For using GFDL in LaTeX.
+Repository: https://puszcza.gnu.org.ua/projects/gfdl-tex
+License: GPLv3+, GFDLv1.3+
+-------------------------------------------------------------
diff --git a/macros/latex/contrib/gfdl/gfdl-tex-1p1.tex b/macros/latex/contrib/gfdl/gfdl-tex-1p1.tex
new file mode 100644
index 0000000000..447adbe850
--- /dev/null
+++ b/macros/latex/contrib/gfdl/gfdl-tex-1p1.tex
@@ -0,0 +1,475 @@
+% ---------------------------------------------------------
+% LaTeX-Source for printing GFDL v1.1
+% Copyright © 2022, 2023 निरंजन
+%
+% This program is free software: you can redistribute it
+% and/or modify it under the terms of the GNU General Public
+% License as published by the Free Software Foundation,
+% either version 3 of the License, or (at your option) any
+% later version.
+%
+% This program is distributed in the hope that it will be
+% useful, but WITHOUT ANY WARRANTY; without even the implied
+% warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+% PURPOSE. See the GNU General Public License for more
+% details.
+%
+% You should have received a copy of the GNU General Public
+% License along with this program. If not, see
+% <https://www.gnu.org/licenses/>.
+% ---------------------------------------------------------
+\begin{center}
+ \textbf{\LARGE GNU Free Documentation License}
+
+ \bigskip
+
+ Version 1.1, March 2000
+
+ Copyright \copyright\ 2000 Free Software Foundation, Inc.
+
+ \bigskip
+
+ 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+ Everyone is permitted to copy and distribute verbatim
+ copies of this license document, but changing it is not
+ allowed.
+
+ \bigskip
+
+ \textbf{\Large Preamble}
+\end{center}
+
+The purpose of this License is to make a manual, textbook,
+or other written document \enquote{free} in the sense of
+freedom: to assure everyone the effective freedom to copy
+and redistribute it, with or without modifying it, either
+commercially or noncommercially. Secondarily, this License
+preserves for the author and publisher a way to get credit
+for their work, while not being considered responsible for
+modifications made by others.
+
+This License is a kind of \enquote{copyleft}, which means
+that derivative works of the document must themselves be
+free in the same sense. It complements the GNU General
+Public License, which is a copyleft license designed for
+free software.
+
+We have designed this License in order to use it for manuals
+for free software, because free software needs free
+documentation: a free program should come with manuals
+providing the same freedoms that the software does. But this
+License is not limited to software manuals; it can be used
+for any textual work, regardless of subject matter or
+whether it is published as a printed book. We recommend this
+License principally for works whose purpose is instruction
+or reference.
+
+\medskip
+\begin{center}
+ \textbf{\Large Applicability and Definitions}
+\end{center}
+
+\noindent
+This License applies to any manual or other work that
+contains a notice placed by the copyright holder saying it
+can be distributed under the terms of this License. The
+\enquote{Document}, below, refers to any such manual or
+work. Any member of the public is a licensee, and is
+addressed as \enquote{you}.
+
+A \enquote{Modified Version} of the Document means any work
+containing the Document or a portion of it, either copied
+verbatim, or with modifications and/or translated into
+another language.
+
+A \enquote{Secondary Section} is a named appendix or a
+front-matter section of the Document that deals exclusively
+with the relationship of the publishers or authors of the
+Document to the Document's overall subject (or to related
+matters) and contains nothing that could fall directly
+within that overall subject. (For example, if the Document
+is in part a textbook of mathematics, a Secondary Section
+may not explain any mathematics.) The relationship could be
+a matter of historical connection with the subject or with
+related matters, or of legal, commercial, philosophical,
+ethical or political position regarding them.
+
+The \enquote{Invariant Sections} are certain Secondary
+Sections whose titles are designated, as being those of
+Invariant Sections, in the notice that says that the
+Document is released under this License.
+
+The \enquote{Cover Texts} are certain short passages of text
+that are listed, as Front-Cover Texts or Back-Cover Texts,
+in the notice that says that the Document is released under
+this License.
+
+A \enquote{Transparent} copy of the Document means a
+machine-readable copy, represented in a format whose
+specification is available to the general public, whose
+contents can be viewed and edited directly and
+straightforwardly with generic text editors or (for images
+composed of pixels) generic paint programs or (for drawings)
+some widely available drawing editor, and that is suitable
+for input to text formatters or for automatic translation to
+a variety of formats suitable for input to text formatters.
+A copy made in an otherwise Transparent file format whose
+markup has been designed to thwart or discourage subsequent
+modification by readers is not Transparent. A copy that is
+not \enquote{Transparent} is called \enquote{Opaque}.
+
+Examples of suitable formats for Transparent copies include
+plain ASCII without markup, Texinfo input format,
+\LaTeX~input format, SGML or XML using a publicly available
+DTD, and standard-conforming simple HTML designed for human
+modification. Opaque formats include PostScript, PDF,
+proprietary formats that can be read and edited only by
+proprietary word processors, SGML or XML for which the DTD
+and/or processing tools are not generally available, and the
+machine-generated HTML produced by some word processors for
+output purposes only.
+
+The \enquote{Title Page} means, for a printed book, the
+title page itself, plus such following pages as are needed
+to hold, legibly, the material this License requires to
+appear in the title page. For works in formats which do not
+have any title page as such, \enquote{Title Page} means the
+text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+\medskip
+\begin{center}
+ \textbf{\Large Verbatim Copying}
+\end{center}
+
+\noindent
+You may copy and distribute the Document in any medium,
+either commercially or noncommercially, provided that this
+License, the copyright notices, and the license notice
+saying this License applies to the Document are reproduced
+in all copies, and that you add no other conditions
+whatsoever to those of this License. You may not use
+technical measures to obstruct or control the reading or
+further copying of the copies you make or distribute.
+However, you may accept compensation in exchange for copies.
+If you distribute a large enough number of copies you must
+also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated
+above, and you may publicly display copies.
+
+\medskip
+\begin{center}
+ \textbf{\Large Copying in Quantity}
+\end{center}
+
+\noindent
+If you publish printed copies of the Document numbering more
+than 100, and the Document's license notice requires Cover
+Texts, you must enclose the copies in covers that carry,
+clearly and legibly, all these Cover Texts: Front-Cover
+Texts on the front cover, and Back-Cover Texts on the back
+cover. Both covers must also clearly and legibly identify
+you as the publisher of these copies. The front cover must
+present the full title with all words of the title equally
+prominent and visible. You may add other material on the
+covers in addition. Copying with changes limited to the
+covers, as long as they preserve the title of the Document
+and satisfy these conditions, can be treated as verbatim
+copying in other respects.
+
+If the required texts for either cover are too voluminous to
+fit legibly, you should put the first ones listed (as many
+as fit reasonably) on the actual cover, and continue the
+rest onto adjacent pages.
+
+If you publish or distribute Opaque copies of the Document
+numbering more than 100, you must either include a
+machine-readable Transparent copy along with each Opaque
+copy, or state in or with each Opaque copy a
+publicly-accessible computer-network location containing a
+complete Transparent copy of the Document, free of added
+material, which the general network-using public has access
+to download anonymously at no charge using public-standard
+network protocols. If you use the latter option, you must
+take reasonably prudent steps, when you begin distribution
+of Opaque copies in quantity, to ensure that this
+Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you
+distribute an Opaque copy (directly or through your agents
+or retailers) of that edition to the public.
+
+It is requested, but not required, that you contact the
+authors of the Document well before redistributing any large
+number of copies, to give them a chance to provide you with
+an updated version of the Document.
+
+\medskip
+\begin{center}
+ \textbf{\Large Modifications}
+\end{center}
+
+\noindent
+You may copy and distribute a Modified Version of the
+Document under the conditions of sections 2 and 3 above,
+provided that you release the Modified Version under
+precisely this License, with the Modified Version filling
+the role of the Document, thus licensing distribution and
+modification of the Modified Version to whoever possesses a
+copy of it. In addition, you must do these things in the
+Modified Version:
+
+\begin{itemize}
+\item Use in the Title Page (and on the covers, if any) a
+ title distinct from that of the Document, and from those
+ of previous versions (which should, if there were any, be
+ listed in the History section of the Document). You may
+ use the same title as a previous version if the original
+ publisher of that version gives permission.
+\item List on the Title Page, as authors, one or more
+ persons or entities responsible for authorship of the
+ modifications in the Modified Version, together with at
+ least five of the principal authors of the Document (all
+ of its principal authors, if it has less than five).
+\item State on the Title page the name of the publisher of
+ the Modified Version, as the publisher.
+\item Preserve all the copyright notices of the Document.
+\item Add an appropriate copyright notice for your
+ modifications adjacent to the other copyright notices.
+\item Include, immediately after the copyright notices, a
+ license notice giving the public permission to use the
+ Modified Version under the terms of this License, in the
+ form shown in the Addendum below.
+\item Preserve in that license notice the full lists of
+ Invariant Sections and required Cover Texts given in the
+ Document's license notice.
+\item Include an unaltered copy of this License.
+\item Preserve the section entitled \enquote{History}, and
+ its title, and add to it an item stating at least the
+ title, year, new authors, and publisher of the Modified
+ Version as given on the Title Page. If there is no section
+ entitled \enquote{History} in the Document, create one
+ stating the title, year, authors, and publisher of the
+ Document as given on its Title Page, then add an item
+ describing the Modified Version as stated in the previous
+ sentence.
+\item Preserve the network location, if any, given in the
+ Document for public access to a Transparent copy of the
+ Document, and likewise the network locations given in the
+ Document for previous versions it was based on. These may
+ be placed in the \enquote{History} section. You may omit a
+ network location for a work that was published at least
+ four years before the Document itself, or if the original
+ publisher of the version it refers to gives permission.
+\item In any section entitled \enquote{Acknowledgements} or
+ \enquote{Dedications}, preserve the section's title, and
+ preserve in the section all the substance and tone of each
+ of the contributor acknowledgements and/or dedications
+ given therein.
+\item Preserve all the Invariant Sections of the Document,
+ unaltered in their text and in their titles. Section
+ numbers or the equivalent are not considered part of the
+ section titles.
+\item Delete any section entitled \enquote{Endorsements}.
+ Such a section may not be included in the Modified
+ Version.
+\item Do not retitle any existing section as
+ \enquote{Endorsements} or to conflict in title with any
+ Invariant Section.
+\end{itemize}
+
+If the Modified Version includes new front-matter sections
+or appendices that qualify as Secondary Sections and contain
+no material copied from the Document, you may at your option
+designate some or all of these sections as invariant. To do
+this, add their titles to the list of Invariant Sections in
+the Modified Version's license notice. These titles must be
+distinct from any other section titles.
+
+You may add a section entitled \enquote{Endorsements},
+provided it contains nothing but endorsements of your
+Modified Version by various parties--for example, statements
+of peer review or that the text has been approved by an
+organization as the authoritative definition of a standard.
+
+You may add a passage of up to five words as a Front-Cover
+Text, and a passage of up to 25 words as a Back-Cover Text,
+to the end of the list of Cover Texts in the Modified
+Version. Only one passage of Front-Cover Text and one of
+Back-Cover Text may be added by (or through arrangements
+made by) any one entity. If the Document already includes a
+cover text for the same cover, previously added by you or by
+arrangement made by the same entity you are acting on behalf
+of, you may not add another; but you may replace the old
+one, on explicit permission from the previous publisher that
+added the old one.
+
+The author(s) and publisher(s) of the Document do not by
+this License give permission to use their names for
+publicity for or to assert or imply endorsement of any
+Modified Version.
+
+\begin{center}
+ \textbf{\Large Combining Documents}
+\end{center}
+
+You may combine the Document with other documents released
+under this License, under the terms defined in section 4
+above for modified versions, provided that you include in
+the combination all of the Invariant Sections of all of the
+original documents, unmodified, and list them all as
+Invariant Sections of your combined work in its license
+notice.
+
+The combined work need only contain one copy of this
+License, and multiple identical Invariant Sections may be
+replaced with a single copy. If there are multiple Invariant
+Sections with the same name but different contents, make the
+title of each such section unique by adding at the end of
+it, in parentheses, the name of the original author or
+publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list
+of Invariant Sections in the license notice of the combined
+work.
+
+In the combination, you must combine any sections entitled
+\enquote{History} in the various original documents, forming
+one section entitled \enquote{History}; likewise combine any
+sections entitled \enquote{Acknowledgements}, and any
+sections entitled \enquote{Dedications}. You must delete all
+sections entitled \enquote{Endorsements}.
+
+\begin{center}
+ \textbf{\Large Collections of Documents}
+\end{center}
+
+You may make a collection consisting of the Document and
+other documents released under this License, and replace the
+individual copies of this License in the various documents
+with a single copy that is included in the collection,
+provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other
+respects.
+
+You may extract a single document from such a collection,
+and distribute it individually under this License, provided
+you insert a copy of this License into the extracted
+document, and follow this License in all other respects
+regarding verbatim copying of that document.
+
+\medskip
+\begin{center}
+ \textbf{\Large Aggregation With Independent Works}
+\end{center}
+
+\noindent
+A compilation of the Document or its derivatives with other
+separate and independent documents or works, in or on a
+volume of a storage or distribution medium, does not as a
+whole count as a Modified Version of the Document, provided
+no compilation copyright is claimed for the compilation.
+Such a compilation is called an \enquote{aggregate}, and
+this License does not apply to the other self-contained
+works thus compiled with the Document, on account of their
+being thus compiled, if they are not themselves derivative
+works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to
+these copies of the Document, then if the Document is less
+than one quarter of the entire aggregate, the Document's
+Cover Texts may be placed on covers that surround only the
+Document within the aggregate. Otherwise they must appear on
+covers around the whole aggregate.
+
+\begin{center}
+ \textbf{\Large Translation}
+\end{center}
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of
+section 4. Replacing Invariant Sections with translations
+requires special permission from their copyright holders,
+but you may include translations of some or all Invariant
+Sections in addition to the original versions of these
+Invariant Sections. You may include a translation of this
+License provided that you also include the original English
+version of this License. In case of a disagreement between
+the translation and the original English version of this
+License, the original English version will prevail.
+
+\medskip
+\begin{samepage}
+ \begin{center}
+ \textbf{\Large Termination}
+ \end{center}
+
+ \noindent
+ You may not copy, modify, sublicense, or distribute the
+ Document except as expressly provided for under this
+ License. Any other attempt to copy, modify, sublicense or
+ distribute the Document is void, and will automatically
+ terminate your rights under this License. However, parties
+ who have received copies, or rights, from you under this
+ License will not have their licenses terminated so long as
+ such parties remain in full compliance.
+\end{samepage}
+
+\begin{center}
+ \textbf{\Large Future Revisions of This License}
+\end{center}
+
+The Free Software Foundation may publish new, revised
+versions of the GNU Free Documentation License from time to
+time. Such new versions will be similar in spirit to the
+present version, but may differ in detail to address new
+problems or concerns. See
+\url{https://www.gnu.org/licenses}.
+
+Each version of the License is given a distinguishing
+version number. If the Document specifies that a particular
+numbered version of this License "or any later version"
+applies to it, you have the option of following the terms
+and conditions either of that specified version or of any
+later version that has been published (not as a draft) by
+the Free Software Foundation. If the Document does not
+specify a version number of this License, you may choose any
+version ever published (not as a draft) by the Free Software
+Foundation.
+
+\medskip
+\begin{center}
+ \textbf{\Large ADDENDUM: How to use this License for your
+ documents}
+\end{center}
+
+\noindent
+To use this License in a document you have written, include
+a copy of the License in the document and put the following
+copyright and license notices just after the title page:
+
+\begin{quote}
+ Copyright \copyright\ YEAR YOUR NAME.
+ Permission is granted to copy, distribute and/or modify
+ this document under the terms of the GNU Free
+ Documentation License, Version 1.1 or any later version
+ published by the Free Software Foundation; with the
+ Invariant Sections being LIST THEIR TITLES, with the
+ Front-Cover Texts being LIST, and with the Back-Cover
+ Texts being LIST. A copy of the license is included in the
+ section entitled \enquote{GNU Free Documentation
+ License}.
+\end{quote}
+
+If you have no Invariant Sections, write \enquote{with no
+Invariant Sections} instead of saying which ones are
+invariant. If you have no Front-Cover Texts, write
+\enquote{no Front-Cover Texts} instead of
+\enquote{Front-Cover Texts being LIST}; likewise for
+Back-Cover Texts.
+
+If your document contains nontrivial examples of program
+code, we recommend releasing these examples in parallel
+under your choice of free software license, such as the GNU
+General Public License, to permit their use in free
+software. \ No newline at end of file
diff --git a/macros/latex/contrib/gfdl/gfdl-tex-1p2.tex b/macros/latex/contrib/gfdl/gfdl-tex-1p2.tex
new file mode 100644
index 0000000000..7dc9e91eca
--- /dev/null
+++ b/macros/latex/contrib/gfdl/gfdl-tex-1p2.tex
@@ -0,0 +1,552 @@
+% ---------------------------------------------------------
+% LaTeX-Source for printing GFDL v1.2
+% Copyright © 2022, 2023 निरंजन
+%
+% This program is free software: you can redistribute it
+% and/or modify it under the terms of the GNU General Public
+% License as published by the Free Software Foundation,
+% either version 3 of the License, or (at your option) any
+% later version.
+%
+% This program is distributed in the hope that it will be
+% useful, but WITHOUT ANY WARRANTY; without even the implied
+% warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+% PURPOSE. See the GNU General Public License for more
+% details.
+%
+% You should have received a copy of the GNU General Public
+% License along with this program. If not, see
+% <https://www.gnu.org/licenses/>.
+% ---------------------------------------------------------
+\begin{center}
+ \textbf{\LARGE GNU Free Documentation License}
+
+ \bigskip
+
+ Version 1.2, November 2002
+
+ Copyright \copyright{} 2000, 2001, 2002 Free Software
+ Foundation, Inc.
+
+ \bigskip
+
+ 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+ \bigskip
+
+ Everyone is permitted to copy and distribute verbatim
+ copies of this license document, but changing it is not
+ allowed.
+ \bigskip
+
+ \textbf{\Large Preamble}
+\end{center}
+
+The purpose of this License is to make a manual, textbook,
+or other functional and useful document \enquote{free} in
+the sense of freedom: to assure everyone the effective
+freedom to copy and redistribute it, with or without
+modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and
+publisher a way to get credit for their work, while not
+being considered responsible for modifications made by
+others.
+
+This License is a kind of \enquote{copyleft}, which means
+that derivative works of the document must themselves be
+free in the same sense. It complements the GNU General
+Public License, which is a copyleft license designed for
+free software.
+
+We have designed this License in order to use it for manuals
+for free software, because free software needs free
+documentation: a free program should come with manuals
+providing the same freedoms that the software does. But this
+License is not limited to software manuals; it can be used
+for any textual work, regardless of subject matter or
+whether it is published as a printed book. We recommend this
+License principally for works whose purpose is instruction
+or reference.
+
+\medskip
+\begin{center}
+ \textbf{\Large 1. APPLICABILITY AND DEFINITIONS}
+\end{center}
+
+\noindent
+This License applies to any manual or other work, in any
+medium, that contains a notice placed by the copyright
+holder saying it can be distributed under the terms of this
+License. Such a notice grants a world-wide, royalty-free
+license, unlimited in duration, to use that work under the
+conditions stated herein. The \textbf{\enquote{Document}},
+below, refers to any such manual or work. Any member of the
+public is a licensee, and is addressed as
+\textbf{\enquote{you}}. You accept the license if you copy,
+modify or distribute the work in a way requiring permission
+under copyright law.
+
+A \textbf{\enquote{Modified Version}} of the Document means
+any work containing the Document or a portion of it, either
+copied verbatim, or with modifications and/or translated
+into another language.
+
+A \textbf{\enquote{Secondary Section}} is a named appendix
+or a front-matter section of the Document that deals
+exclusively with the relationship of the publishers or
+authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall
+directly within that overall subject. (Thus, if the Document
+is in part a textbook of mathematics, a Secondary Section
+may not explain any mathematics.) The relationship could be
+a matter of historical connection with the subject or with
+related matters, or of legal, commercial, philosophical,
+ethical or political position regarding them.
+
+The \textbf{\enquote{Invariant Sections}} are certain
+Secondary Sections whose titles are designated, as being
+those of Invariant Sections, in the notice that says that
+the Document is released under this License. If a section
+does not fit the above definition of Secondary then it is
+not allowed to be designated as Invariant. The Document may
+contain zero Invariant Sections. If the Document does not
+identify any Invariant Sections then there are none.
+
+The \textbf{\enquote{Cover Texts}} are certain short
+passages of text that are listed, as Front-Cover Texts or
+Back-Cover Texts, in the notice that says that the Document
+is released under this License. A Front-Cover Text may be at
+most 5 words, and a Back-Cover Text may be at most 25
+words.
+
+A \textbf{\enquote{Transparent}} copy of the Document means
+a machine-readable copy, represented in a format whose
+specification is available to the general public, that is
+suitable for revising the document straightforwardly with
+generic text editors or (for images composed of pixels)
+generic paint programs or (for drawings) some widely
+available drawing editor, and that is suitable for input to
+text formatters or for automatic translation to a variety of
+formats suitable for input to text formatters. A copy made
+in an otherwise Transparent file format whose markup, or
+absence of markup, has been arranged to thwart or discourage
+subsequent modification by readers is not Transparent. An
+image format is not Transparent if used for any substantial
+amount of text. A copy that is not \enquote{Transparent} is
+called \textbf{\enquote{Opaque}}.
+
+Examples of suitable formats for Transparent copies include
+plain ASCII without markup, Texinfo input format, LaTeX
+input format, SGML or XML using a publicly available DTD,
+and standard-conforming simple HTML, PostScript or PDF
+designed for human modification. Examples of transparent
+image formats include PNG, XCF and JPG. Opaque formats
+include proprietary formats that can be read and edited only
+by proprietary word processors, SGML or XML for which the
+DTD and/or processing tools are not generally available, and
+the machine-generated HTML, PostScript or PDF produced by
+some word processors for output purposes only.
+
+The \textbf{\enquote{Title Page}} means, for a printed book,
+the title page itself, plus such following pages as are
+needed to hold, legibly, the material this License requires
+to appear in the title page. For works in formats which do
+not have any title page as such, \enquote{Title Page} means
+the text near the most prominent appearance of the work's
+title, preceding the beginning of the body of the text.
+
+A section \textbf{\enquote{Entitled XYZ}} means a named
+subunit of the Document whose title either is precisely XYZ
+or contains XYZ in parentheses following text that
+translates XYZ in another language. (Here XYZ stands for a
+specific section name mentioned below, such as
+\textbf{\enquote{Acknowledgements}},
+\textbf{\enquote{Dedications}},
+\textbf{\enquote{Endorsements}}, or
+\textbf{\enquote{History}}.) To \textbf{\enquote{Preserve
+ the Title}} of such a section when you modify the
+Document means that it remains a section \enquote{Entitled
+ XYZ} according to this definition.
+
+The Document may include Warranty Disclaimers next to the
+notice which states that this License applies to the
+Document. These Warranty Disclaimers are considered to be
+included by reference in this License, but only as regards
+disclaiming warranties: any other implication that these
+Warranty Disclaimers may have is void and has no effect on
+the meaning of this License.
+
+\medskip
+\begin{center}
+ \textbf{\Large 2. VERBATIM COPYING}
+\end{center}
+
+\noindent
+You may copy and distribute the Document in any medium,
+either commercially or noncommercially, provided that this
+License, the copyright notices, and the license notice
+saying this License applies to the Document are reproduced
+in all copies, and that you add no other conditions
+whatsoever to those of this License. You may not use
+technical measures to obstruct or control the reading or
+further copying of the copies you make or distribute.
+However, you may accept compensation in exchange for copies.
+If you distribute a large enough number of copies you must
+also follow the conditions in section~3.
+
+You may also lend copies, under the same conditions stated
+above, and you may publicly display copies.
+
+\medskip
+\begin{center}
+ \textbf{\Large 3. COPYING IN QUANTITY}
+\end{center}
+
+\noindent
+If you publish printed copies (or copies in media that
+commonly have printed covers) of the Document, numbering
+more than 100, and the Document's license notice requires
+Cover Texts, you must enclose the copies in covers that
+carry, clearly and legibly, all these Cover Texts:
+Front-Cover Texts on the front cover, and Back-Cover Texts
+on the back cover. Both covers must also clearly and legibly
+identify you as the publisher of these copies. The front
+cover must present the full title with all words of the
+title equally prominent and visible. You may add other
+material on the covers in addition. Copying with changes
+limited to the covers, as long as they preserve the title of
+the Document and satisfy these conditions, can be treated as
+verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to
+fit legibly, you should put the first ones listed (as many
+as fit reasonably) on the actual cover, and continue the
+rest onto adjacent pages.
+
+If you publish or distribute Opaque copies of the Document
+numbering more than 100, you must either include a
+machine-readable Transparent copy along with each Opaque
+copy, or state in or with each Opaque copy a
+computer-network location from which the general
+network-using public has access to download using
+public-standard network protocols a complete Transparent
+copy of the Document, free of added material. If you use the
+latter option, you must take reasonably prudent steps, when
+you begin distribution of Opaque copies in quantity, to
+ensure that this Transparent copy will remain thus
+accessible at the stated location until at least one year
+after the last time you distribute an Opaque copy (directly
+or through your agents or retailers) of that edition to the
+public.
+
+It is requested, but not required, that you contact the
+authors of the Document well before redistributing any large
+number of copies, to give them a chance to provide you with
+an updated version of the Document.
+
+\medskip
+\begin{center}
+ \textbf{\Large 4. MODIFICATIONS}
+\end{center}
+
+\noindent
+You may copy and distribute a Modified Version of the
+Document under the conditions of sections 2 and 3 above,
+provided that you release the Modified Version under
+precisely this License, with the Modified Version filling
+the role of the Document, thus licensing distribution and
+modification of the Modified Version to whoever possesses a
+copy of it. In addition, you must do these things in the
+Modified Version:
+
+\begin{itemize}
+\item[A.] Use in the Title Page (and on the covers, if any)
+ a title distinct from that of the Document, and from those
+ of previous versions (which should, if there were any, be
+ listed in the History section of the Document). You may
+ use the same title as a previous version if the original
+ publisher of that version gives permission.
+
+\item[B.] List on the Title Page, as authors, one or more
+ persons or entities responsible for authorship of the
+ modifications in the Modified Version, together with at
+ least five of the principal authors of the Document (all
+ of its principal authors, if it has fewer than five),
+ unless they release you from this requirement.
+
+\item[C.] State on the Title page the name of the publisher
+ of the Modified Version, as the publisher.
+
+\item[D.] Preserve all the copyright notices of the
+ Document.
+
+\item[E.] Add an appropriate copyright notice for your
+ modifications adjacent to the other copyright notices.
+
+\item[F.] Include, immediately after the copyright notices,
+ a license notice giving the public permission to use the
+ Modified Version under the terms of this License, in the
+ form shown in the Addendum below.
+
+\item[G.] Preserve in that license notice the full lists of
+ Invariant Sections and required Cover Texts given in the
+ Document's license notice.
+
+\item[H.] Include an unaltered copy of this License.
+
+\item[I.] Preserve the section Entitled \enquote{History},
+ Preserve its Title, and add to it an item stating at least
+ the title, year, new authors, and publisher of the
+ Modified Version as given on the Title Page. If there is
+ no section Entitled \enquote{History} in the Document,
+ create one stating the title, year, authors, and publisher
+ of the Document as given on its Title Page, then add an
+ item describing the Modified Version as stated in the
+ previous sentence.
+
+\item[J.] Preserve the network location, if any, given in
+ the Document for public access to a Transparent copy of
+ the Document, and likewise the network locations given in
+ the Document for previous versions it was based on. These
+ may be placed in the ``History'' section. You may omit a
+ network location for a work that was published at least
+ four years before the Document itself, or if the original
+ publisher of the version it refers to gives permission.
+
+\item[K.] For any section Entitled
+ \enquote{Acknowledgements} or \enquote{Dedications},
+ Preserve the Title of the section, and preserve in the
+ section all the substance and tone of each of the
+ contributor acknowledgements and/or dedications given
+ therein.
+
+\item[L.] Preserve all the Invariant Sections of the
+ Document, unaltered in their text and in their titles.
+ Section numbers or the equivalent are not considered part
+ of the section titles.
+
+\item[M.] Delete any section Entitled
+ \enquote{Endorsements}. Such a section may not be included
+ in the Modified Version.
+
+\item[N.] Do not retitle any existing section to be Entitled
+ \enquote{Endorsements} or to conflict in title with any
+ Invariant Section.
+
+\item[O.] Preserve any Warranty Disclaimers.
+\end{itemize}
+
+If the Modified Version includes new front-matter sections
+or appendices that qualify as Secondary Sections and contain
+no material copied from the Document, you may at your option
+designate some or all of these sections as invariant. To do
+this, add their titles to the list of Invariant Sections in
+the Modified Version's license notice. These titles must be
+distinct from any other section titles.
+
+You may add a section Entitled \enquote{Endorsements},
+provided it contains nothing but endorsements of your
+Modified Version by various parties--for example, statements
+of peer review or that the text has been approved by an
+organization as the authoritative definition of a standard.
+
+You may add a passage of up to five words as a Front-Cover
+Text, and a passage of up to 25 words as a Back-Cover Text,
+to the end of the list of Cover Texts in the Modified
+Version. Only one passage of Front-Cover Text and one of
+Back-Cover Text may be added by (or through arrangements
+made by) any one entity. If the Document already includes a
+cover text for the same cover, previously added by you or by
+arrangement made by the same entity you are acting on behalf
+of, you may not add another; but you may replace the old
+one, on explicit permission from the previous publisher that
+added the old one.
+
+The author(s) and publisher(s) of the Document do not by
+this License give permission to use their names for
+publicity for or to assert or imply endorsement of any
+Modified Version.
+
+\medskip
+\begin{center}
+ \textbf{\Large 5. COMBINING DOCUMENTS}
+\end{center}
+
+\noindent
+You may combine the Document with other documents released
+under this License, under the terms defined in section~4
+above for modified versions, provided that you include in
+the combination all of the Invariant Sections of all of the
+original documents, unmodified, and list them all as
+Invariant Sections of your combined work in its license
+notice, and that you preserve all their Warranty
+Disclaimers.
+
+The combined work need only contain one copy of this
+License, and multiple identical Invariant Sections may be
+replaced with a single copy. If there are multiple Invariant
+Sections with the same name but different contents, make the
+title of each such section unique by adding at the end of
+it, in parentheses, the name of the original author or
+publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list
+of Invariant Sections in the license notice of the combined
+work.
+
+In the combination, you must combine any sections Entitled
+\enquote{History} in the various original documents, forming
+one section Entitled \enquote{History}; likewise combine any
+sections Entitled \enquote{Acknowledgements}, and any
+sections Entitled \enquote{Dedications}. You must delete all
+sections Entitled \enquote{Endorsements}.
+
+\medskip
+\begin{center}
+ \textbf{\Large 6. COLLECTIONS OF DOCUMENTS}
+\end{center}
+
+\noindent
+You may make a collection consisting of the Document and
+other documents released under this License, and replace the
+individual copies of this License in the various documents
+with a single copy that is included in the collection,
+provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other
+respects. You may extract a single document from such a
+collection, and distribute it individually under this
+License, provided you insert a copy of this License into the
+extracted document, and follow this License in all other
+respects regarding verbatim copying of that document.
+
+\medskip
+\begin{center}
+ \textbf{\Large 7. AGGREGATION WITH INDEPENDENT WORKS}
+\end{center}
+
+\noindent
+A compilation of the Document or its derivatives with other
+separate and independent documents or works, in or on a
+volume of a storage or distribution medium, is called an
+\enquote{aggregate} if the copyright resulting from the
+compilation is not used to limit the legal rights of the
+compilation's users beyond what the individual works
+permit. When the Document is included in an aggregate, this
+License does not apply to the other works in the aggregate
+which are not themselves derivative works of the Document.
+
+If the Cover Text requirement of section~3 is applicable to
+these copies of the Document, then if the Document is less
+than one half of the entire aggregate, the Document's Cover
+Texts may be placed on covers that bracket the Document
+within the aggregate, or the electronic equivalent of covers
+if the Document is in electronic form. Otherwise they must
+appear on printed covers that bracket the whole aggregate.
+
+\medskip
+\begin{center}
+ \textbf{\Large 8. TRANSLATION}
+\end{center}
+
+\noindent
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of
+section~4. Replacing Invariant Sections with translations
+requires special permission from their copyright holders,
+but you may include translations of some or all Invariant
+Sections in addition to the original versions of these
+Invariant Sections. You may include a translation of this
+License, and all the license notices in the Document, and
+any Warranty Disclaimers, provided that you also include the
+original English version of this License and the original
+versions of those notices and disclaimers. In case of a
+disagreement between the translation and the original
+version of this License or a notice or disclaimer, the
+original version will prevail.
+
+If a section in the Document is Entitled
+\enquote{Acknowledgements}, \enquote{Dedications}, or
+\enquote{History}, the requirement (section~4) to Preserve
+its Title (section~1) will typically require changing the
+actual title.
+
+\medskip
+\begin{center}
+ \textbf{\Large 9. TERMINATION}
+\end{center}
+
+\noindent
+You may not copy, modify, sublicense, or distribute the
+Document except as expressly provided for under this
+License. Any other attempt to copy, modify, sublicense or
+distribute the Document is void, and will automatically
+terminate your rights under this License. However, parties
+who have received copies, or rights, from you under this
+License will not have their licenses terminated so long as
+such parties remain in full compliance.
+
+\medskip
+\begin{center}
+ \textbf{\Large 10. FUTURE REVISIONS OF THIS LICENSE}
+\end{center}
+
+\noindent
+The Free Software Foundation may publish new, revised
+versions of the GNU Free Documentation License from time to
+time. Such new versions will be similar in spirit to the
+present version, but may differ in detail to address new
+problems or concerns. See
+\url{https://www.gnu.org/licenses}.
+
+Each version of the License is given a distinguishing
+version number. If the Document specifies that a particular
+numbered version of this License \enquote{or any later
+ version} applies to it, you have the option of following
+the terms and conditions either of that specified version or
+of any later version that has been published (not as a
+draft) by the Free Software Foundation. If the Document does
+not specify a version number of this License, you may choose
+any version ever published (not as a draft) by the Free
+Software Foundation.
+
+\medskip
+\begin{center}
+ \textbf{\Large ADDENDUM: How to use this License for your
+ documents}
+\end{center}
+
+\noindent
+To use this License in a document you have written, include
+a copy of the License in the document and put the following
+copyright and license notices just after the title page:
+
+\begin{quote}
+ Copyright \copyright{} YEAR YOUR NAME.
+ Permission is granted to copy, distribute and/or modify
+ this document under the terms of the GNU Free
+ Documentation License, Version 1.2 or any later version
+ published by the Free Software Foundation; with no
+ Invariant Sections, no Front-Cover Texts, and no
+ Back-Cover Texts. A copy of the license is included in the
+ section entitled \enquote{GNU Free Documentation
+ License}.
+\end{quote}
+
+If you have Invariant Sections, Front-Cover Texts and
+Back-Cover Texts, replace the \enquote{with \dots\ Texts.}
+line with this:
+
+\begin{quote}
+ with the Invariant Sections being LIST THEIR TITLES, with
+ the Front-Cover Texts being LIST, and with the Back-Cover
+ Texts being LIST.
+\end{quote}
+
+If you have Invariant Sections without Cover Texts, or some
+other combination of the three, merge those two alternatives
+to suit the situation.
+
+If your document contains nontrivial examples of program
+code, we recommend releasing these examples in parallel
+under your choice of free software license, such as the GNU
+General Public License, to permit their use in free
+software. \ No newline at end of file
diff --git a/macros/latex/contrib/gfdl/gfdl-tex-1p3.tex b/macros/latex/contrib/gfdl/gfdl-tex-1p3.tex
new file mode 100644
index 0000000000..e79f1a2877
--- /dev/null
+++ b/macros/latex/contrib/gfdl/gfdl-tex-1p3.tex
@@ -0,0 +1,638 @@
+% ---------------------------------------------------------
+% LaTeX-Source for printing GFDL v1.3
+% Copyright © 2022, 2023 निरंजन
+%
+% This program is free software: you can redistribute it
+% and/or modify it under the terms of the GNU General Public
+% License as published by the Free Software Foundation,
+% either version 3 of the License, or (at your option) any
+% later version.
+%
+% This program is distributed in the hope that it will be
+% useful, but WITHOUT ANY WARRANTY; without even the implied
+% warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+% PURPOSE. See the GNU General Public License for more
+% details.
+%
+% You should have received a copy of the GNU General Public
+% License along with this program. If not, see
+% <https://www.gnu.org/licenses/>.
+% ---------------------------------------------------------
+\begin{center}
+ \textbf{\LARGE GNU Free Documentation License}
+
+ \bigskip
+
+ Version 1.3, 3 November 2008
+
+ Copyright \copyright{} 2000, 2001, 2002, 2007, 2008 Free
+ Software Foundation, Inc.
+
+ \bigskip
+
+ \url{https://fsf.org/}
+
+ \bigskip
+
+ Everyone is permitted to copy and distribute verbatim
+ copies of this license document, but changing it is not
+ allowed.
+
+ \bigskip
+
+ \textbf{\Large Preamble}
+\end{center}
+
+\noindent
+The purpose of this License is to make a manual, textbook,
+or other functional and useful document \enquote{free} in
+the sense of freedom: to assure everyone the effective
+freedom to copy and redistribute it, with or without
+modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and
+publisher a way to get credit for their work, while not
+being considered responsible for modifications made by
+others.
+
+This License is a kind of \enquote{copyleft}, which means
+that derivative works of the document must themselves be
+free in the same sense. It complements the GNU General
+Public License, which is a copyleft license designed for
+free software.
+
+We have designed this License in order to use it for manuals
+for free software, because free software needs free
+documentation: a free program should come with manuals
+providing the same freedoms that the software does. But
+this License is not limited to software manuals; it can be
+used for any textual work, regardless of subject matter or
+whether it is published as a printed book. We recommend this
+License principally for works whose purpose is instruction
+or reference.
+
+\medskip
+\begin{center}
+ \textbf{\Large 1.\ APPLICABILITY AND DEFINITIONS}
+\end{center}
+
+\noindent
+This License applies to any manual or other work, in any
+medium, that contains a notice placed by the copyright
+holder saying it can be distributed under the terms of this
+License. Such a notice grants a world-wide, royalty-free
+license, unlimited in duration, to use that work under the
+conditions stated herein. The \enquote{\textbf{Document}},
+below, refers to any such manual or work. Any member of the
+public is a licensee, and is addressed as \enquote{%
+ \textbf{you}}. You accept the license if you copy, modify
+or distribute the work in a way requiring permission under
+copyright law.
+
+A \enquote{\textbf{Modified Version}} of the Document means
+any work containing the Document or a portion of it, either
+copied verbatim, or with modifications and/or translated
+into another language.
+
+A \enquote{\textbf{Secondary Section}} is a named appendix
+or a front-matter section of the Document that deals
+exclusively with the relationship of the publishers or
+authors of the Document to the Document's overall subject
+(or to related matters) and contains nothing that could fall
+directly within that overall subject. (Thus, if the Document
+is in part a textbook of mathematics, a Secondary Section
+may not explain any mathematics.) The relationship could be
+a matter of historical connection with the subject or with
+related matters, or of legal, commercial, philosophical,
+ethical or political position regarding them.
+
+The \enquote{\textbf{Invariant Sections}} are certain
+Secondary Sections whose titles are designated, as being
+those of Invariant Sections, in the notice that says that
+the Document is released under this License. If a section
+does not fit the above definition of Secondary then it is
+not allowed to be designated as Invariant. The Document may
+contain zero Invariant Sections. If the Document does not
+identify any Invariant Sections then there are none.
+
+The \enquote{\textbf{Cover Texts}} are certain short
+passages of text that are listed, as Front-Cover Texts or
+Back-Cover Texts, in the notice that says that the Document
+is released under this License. A Front-Cover Text may be at
+most 5 words, and a Back-Cover Text may be at most 25
+words.
+
+A \enquote{\textbf{Transparent}} copy of the Document means
+a machine-readable copy, represented in a format whose
+specification is available to the general public, that is
+suitable for revising the document straightforwardly with
+generic text editors or (for images composed of pixels)
+generic paint programs or (for drawings) some widely
+available drawing editor, and that is suitable for input to
+text formatters or for automatic translation to a variety of
+formats suitable for input to text formatters. A copy made
+in an otherwise Transparent file format whose markup, or
+absence of markup, has been arranged to thwart or discourage
+subsequent modification by readers is not Transparent. An
+image format is not Transparent if used for any substantial
+amount of text. A copy that is not \enquote{Transparent} is
+called \enquote{\textbf{Opaque}}.
+
+Examples of suitable formats for Transparent copies include
+plain ASCII without markup, Texinfo input format, \LaTeX\
+input format, SGML or XML using a publicly available DTD,
+and standard-conforming simple HTML, Post\-Script or PDF
+designed for human modification. Examples of transparent
+image formats include PNG, XCF and JPG. Opaque formats
+include proprietary formats that can be read and edited only
+by proprietary word processors, SGML or XML for which the
+DTD and/or processing tools are not generally available, and
+the machine-generated HTML, PostScript or PDF produced by
+some word processors for output purposes only.
+
+The \enquote{\textbf{Title Page}} means, for a printed book,
+the title page itself, plus such following pages as are
+needed to hold, legibly, the material this License requires
+to appear in the title page. For works in formats which do
+not have any title page as such, \enquote{Title Page} means
+the text near the most prominent appearance of the work's
+title, preceding the beginning of the body of the text.
+
+The \enquote{\textbf{publisher}} means any person or entity
+that distributes copies of the Document to the public.
+
+A section \enquote{\textbf{Entitled XYZ}} means a named
+subunit of the Document whose title either is precisely XYZ
+or contains XYZ in parentheses following text that
+translates XYZ in another language. (Here XYZ stands for a
+specific section name mentioned below, such as \enquote{%
+ \textbf{Acknowledgements}}, \enquote{\textbf{%
+ Dedications}}, \enquote{\textbf{Endorsements}}, or
+\enquote{\textbf{History}}.) To \enquote{\textbf{%
+ Preserve the Title}} of such a section when you modify
+the Document means that it remains a section \enquote{%
+ \textbf{Entitled XYZ}} according to this definition.
+
+The Document may include Warranty Disclaimers next to the
+notice which states that this License applies to the
+Document. These Warranty Disclaimers are considered to be
+included by reference in this License, but only as regards
+disclaiming warranties: any other implication that these
+Warranty Disclaimers may have is void and has no effect on
+the meaning of this License.
+
+\medskip
+\begin{center}
+ \textbf{\Large 2. VERBATIM COPYING}
+\end{center}
+
+\noindent
+You may copy and distribute the Document in any medium,
+either commercially or noncommercially, provided that this
+License, the copyright notices, and the license notice
+saying this License applies to the Document are reproduced
+in all copies, and that you add no other conditions
+whatsoever to those of this License. You may not use
+technical measures to obstruct or control the reading or
+further copying of the copies you make or distribute.
+However, you may accept compensation in exchange for copies.
+If you distribute a large enough number of copies you must
+also follow the conditions in section~3.
+
+You may also lend copies, under the same conditions stated
+above, and you may publicly display copies.
+
+\medskip
+\begin{center}
+ \textbf{\Large 3. COPYING IN QUANTITY}
+\end{center}
+
+\noindent
+If you publish printed copies (or copies in media that
+commonly have printed covers) of the Document, numbering
+more than 100, and the Document's license notice requires
+Cover Texts, you must enclose the copies in covers that
+carry, clearly and legibly, all these Cover Texts:
+Front-Cover Texts on the front cover, and Back-Cover Texts
+on the back cover. Both covers must also clearly and legibly
+identify you as the publisher of these copies. The front
+cover must present the full title with all words of the
+title equally prominent and visible. You may add other
+material on the covers in addition. Copying with changes
+limited to the covers, as long as they preserve the title of
+the Document and satisfy these conditions, can be treated as
+verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous
+to fit legibly, you should put the first ones listed (as
+many as fit reasonably) on the actual cover, and continue
+the rest onto adjacent pages.
+
+If you publish or distribute Opaque copies of the Document
+numbering more than 100, you must either include a
+machine-readable Transparent copy along with each Opaque
+copy, or state in or with each Opaque copy a
+computer-network location from which the general
+network-using public has access to download using
+public-standard network protocols a complete Transparent
+copy of the Document, free of added material. If you use
+the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity,
+to ensure that this Transparent copy will remain thus
+accessible at the stated location until at least one year
+after the last time you distribute an Opaque copy
+(directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the
+authors of the Document well before redistributing any
+large number of copies, to give them a chance to provide
+you with an updated version of the Document.
+
+\medskip
+\begin{center}
+ \textbf{\Large 4. MODIFICATIONS}
+\end{center}
+
+\noindent
+You may copy and distribute a Modified Version of the
+Document under the conditions of sections 2 and 3 above,
+provided that you release the Modified Version under
+precisely this License, with the Modified Version filling
+the role of the Document, thus licensing distribution and
+modification of the Modified Version to whoever possesses
+a copy of it. In addition, you must do these things in
+the Modified Version:
+
+\begin{itemize}
+\item[A.]
+ Use in the Title Page (and on the covers, if any) a
+ title distinct from that of the Document, and from those
+ of previous versions (which should, if there were any,
+ be listed in the History section of the Document). You
+ may use the same title as a previous version if the
+ original publisher of that version gives permission.
+
+\item[B.]
+ List on the Title Page, as authors, one or more persons
+ or entities responsible for authorship of the
+ modifications in the Modified Version, together with at
+ least five of the principal authors of the Document (all
+ of its principal authors, if it has fewer than five),
+ unless they release you from this requirement.
+
+\item[C.]
+ State on the Title page the name of the publisher of the
+ Modified Version, as the publisher.
+
+\item[D.]
+ Preserve all the copyright notices of the Document.
+
+\item[E.]
+ Add an appropriate copyright notice for your
+ modifications adjacent to the other copyright notices.
+
+\item[F.]
+ Include, immediately after the copyright notices, a
+ license notice giving the public permission to use the
+ Modified Version under the terms of this License, in the
+ form shown in the Addendum below.
+
+\item[G.]
+ Preserve in that license notice the full lists of
+ Invariant Sections and required Cover Texts given in the
+ Document's license notice.
+
+\item[H.]
+ Include an unaltered copy of this License.
+
+\item[I.]
+ Preserve the section Entitled \enquote{History}, Preserve
+ its Title, and add to it an item stating at least the
+ title, year, new authors, and publisher of the Modified
+ Version as given on the Title Page. If there is no section
+ Entitled \enquote{History} in the Document, create one
+ stating the title, year, authors, and publisher of the
+ Document as given on its Title Page, then add an item
+ describing the Modified Version as stated in the previous
+ sentence.
+
+\item[J.]
+ Preserve the network location, if any, given in the
+ Document for public access to a Transparent copy of the
+ Document, and likewise the network locations given in
+ the Document for previous versions it was based on.
+ These may be placed in the \enquote{History} section. You
+ may omit a network location for a work that was published
+ at least four years before the Document itself, or if the
+ original publisher of the version it refers to gives
+ permission.
+
+\item[K.]
+ For any section Entitled \enquote{Acknowledgements} or
+ \enquote{Dedications}, Preserve the Title of the section,
+ and preserve in the section all the substance and tone of
+ each of the contributor acknowledgements and/or
+ dedications given therein.
+
+\item[L.]
+ Preserve all the Invariant Sections of the Document,
+ unaltered in their text and in their titles. Section
+ numbers or the equivalent are not considered part of the
+ section titles.
+
+\item[M.]
+ Delete any section Entitled \enquote{Endorsements}. Such a
+ section may not be included in the Modified Version.
+
+\item[N.]
+ Do not retitle any existing section to be Entitled
+ \enquote{Endorsements} or to conflict in title with any
+ Invariant Section.
+
+\item[O.]
+ Preserve any Warranty Disclaimers.
+\end{itemize}
+
+If the Modified Version includes new front-matter sections
+or appendices that qualify as Secondary Sections and
+contain no material copied from the Document, you may at
+your option designate some or all of these sections as
+invariant. To do this, add their titles to the list of
+Invariant Sections in the Modified Version's license
+notice. These titles must be distinct from any other
+section titles.
+
+You may add a section Entitled \enquote{Endorsements},
+provided it contains nothing but endorsements of your
+Modified Version by various parties---for example,
+statements of peer review or that the text has been approved
+by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover
+Text, and a passage of up to 25 words as a Back-Cover Text,
+to the end of the list of Cover Texts in the Modified
+Version. Only one passage of Front-Cover Text and one of
+Back-Cover Text may be added by (or through arrangements
+made by) any one entity. If the Document already includes a
+cover text for the same cover, previously added by you or by
+arrangement made by the same entity you are acting on behalf
+of, you may not add another; but you may replace the old
+one, on explicit permission from the previous publisher that
+added the old one.
+
+The author(s) and publisher(s) of the Document do not by
+this License give permission to use their names for
+publicity for or to assert or imply endorsement of any
+Modified Version.
+
+\medskip
+\begin{center}
+ \textbf{\Large 5. COMBINING DOCUMENTS}
+\end{center}
+
+\noindent
+You may combine the Document with other documents released
+under this License, under the terms defined in section~4
+above for modified versions, provided that you include in
+the combination all of the Invariant Sections of all of
+the original documents, unmodified, and list them all as
+Invariant Sections of your combined work in its license
+notice, and that you preserve all their Warranty
+Disclaimers.
+
+The combined work need only contain one copy of this
+License, and multiple identical Invariant Sections may be
+replaced with a single copy. If there are multiple Invariant
+Sections with the same name but different contents, make the
+title of each such section unique by adding at the end of
+it, in parentheses, the name of the original author or
+publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list
+of Invariant Sections in the license notice of the combined
+work.
+
+In the combination, you must combine any sections Entitled
+\enquote{History} in the various original documents, forming
+one section Entitled \enquote{History}; likewise combine any
+sections Entitled \enquote{Acknowledgements}, and any
+sections Entitled \enquote{Dedications}. You must delete all
+sections Entitled \enquote{Endorsements}.
+
+\medskip
+\begin{center}
+ \textbf{\Large 6. COLLECTIONS OF DOCUMENTS}
+\end{center}
+
+\noindent
+You may make a collection consisting of the Document and
+other documents released under this License, and replace the
+individual copies of this License in the various documents
+with a single copy that is included in the collection,
+provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other
+respects.
+
+You may extract a single document from such a collection,
+and distribute it individually under this License, provided
+you insert a copy of this License into the extracted
+document, and follow this License in all other respects
+regarding verbatim copying of that document.
+
+\medskip
+\begin{center}
+ \textbf{\Large 7. AGGREGATION WITH INDEPENDENT WORKS}
+\end{center}
+
+\noindent
+A compilation of the Document or its derivatives with other
+separate and independent documents or works, in or on a
+volume of a storage or distribution medium, is called an
+\enquote{aggregate} if the copyright resulting from the
+compilation is not used to limit the legal rights of the
+compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License
+does not apply to the other works in the aggregate which are
+not themselves derivative works of the Document.
+
+If the Cover Text requirement of section~3 is applicable to
+these copies of the Document, then if the Document is less
+than one half of the entire aggregate, the Document's Cover
+Texts may be placed on covers that bracket the Document
+within the aggregate, or the electronic equivalent of covers
+if the Document is in electronic form. Otherwise they must
+appear on printed covers that bracket the whole aggregate.
+
+\medskip
+\begin{center}
+ \textbf{\Large 8. TRANSLATION}
+\end{center}
+
+\noindent
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of
+section~4. Replacing Invariant Sections with translations
+requires special permission from their copyright holders,
+but you may include translations of some or all Invariant
+Sections in addition to the original versions of these
+Invariant Sections. You may include a translation of this
+License, and all the license notices in the Document, and
+any Warranty Disclaimers, provided that you also include the
+original English version of this License and the original
+versions of those notices and disclaimers. In case of a
+disagreement between the translation and the original
+version of this License or a notice or disclaimer, the
+original version will prevail.
+
+If a section in the Document is Entitled
+\enquote{Acknowledgements}, \enquote{Dedications}, or
+\enquote{History}, the requirement (section~4) to Preserve
+its Title (section~1) will typically require changing the
+actual title.
+
+\medskip
+\begin{center}
+ \textbf{\Large 9. TERMINATION}
+\end{center}
+
+\noindent
+You may not copy, modify, sublicense, or distribute the
+Document except as expressly provided under this License.
+Any attempt otherwise to copy, modify, sublicense, or
+distribute it is void, and will automatically terminate your
+rights under this License.
+
+However, if you cease all violation of this License, then
+your license from a particular copyright holder is
+reinstated (a) provisionally, unless and until the copyright
+holder explicitly and finally terminates your license, and
+(b) permanently, if the copyright holder fails to notify you
+of the violation by some reasonable means prior to 60 days
+after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you
+of the violation by some reasonable means, this is the first
+time you have received notice of violation of this License
+(for any work) from that copyright holder, and you cure the
+violation prior to 30 days after your receipt of the
+notice.
+
+Termination of your rights under this section does not
+terminate the licenses of parties who have received copies
+or rights from you under this License. If your rights have
+been terminated and not permanently reinstated, receipt of a
+copy of some or all of the same material does not give you
+any rights to use it.
+
+\medskip
+\begin{center}
+ \textbf{\Large 10. FUTURE REVISIONS OF THIS LICENSE}
+\end{center}
+
+\noindent
+The Free Software Foundation may publish new, revised
+versions of the GNU Free Documentation License from time to
+time. Such new versions will be similar in spirit to the
+present version, but may differ in detail to address new
+problems or concerns. See
+\url{https://www.gnu.org/licenses/}.
+
+Each version of the License is given a distinguishing
+version number. If the Document specifies that a particular
+numbered version of this License \enquote{or any later
+ version} applies to it, you have the option of following
+the terms and conditions either of that specified version or
+of any later version that has been published (not as a
+draft) by the Free Software Foundation. If the Document does
+not specify a version number of this License, you may choose
+any version ever published (not as a draft) by the Free
+Software Foundation. If the Document specifies that a proxy
+can decide which future versions of this License can be
+used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version
+for the Document.
+
+\medskip
+\begin{center}
+ \textbf{\Large 11. RELICENSING}
+\end{center}
+
+\begingroup
+\sloppy
+\noindent
+\enquote{Massive Multiauthor Collaboration Site} (or
+\enquote{MMC Site}) means any World Wide Web server that
+publishes copyrightable works and also provides prominent
+facilities for anybody to edit those works. A public wiki
+that anybody can edit is an example of such a server. A
+\enquote{Massive Multiauthor Collaboration} (or
+\enquote{MMC}) contained in the site means any set of
+copyrightable works thus published on the MMC site.
+\endgroup
+
+\enquote{CC-BY-SA} means the Creative Commons
+Attribution-Share Alike 3.0 license published by Creative
+Commons Corporation, a not-for-profit corporation with a
+principal place of business in San Francisco, California, as
+well as future copyleft versions of that license published
+by that same organization.
+
+\enquote{Incorporate} means to publish or republish a
+Document, in whole or in part, as part of another Document.
+
+An MMC is \enquote{eligible for relicensing} if it is
+licensed under this License, and if all works that were
+first published under this License somewhere other than this
+MMC, and subsequently incorporated in whole or in part into
+the MMC, (1) had no cover texts or invariant sections, and
+(2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained
+in the site under CC-BY-SA on the same site at any time
+before August 1, 2009, provided the MMC is eligible for
+relicensing.
+
+\medskip
+\begin{center}
+ \textbf{\Large ADDENDUM: How to use this License for your
+ documents}
+\end{center}
+
+\noindent
+To use this License in a document you have written, include
+a copy of the License in the document and put the following
+copyright and license notices just after the title page:
+
+\begin{quote}
+ Copyright \copyright{} YEAR YOUR NAME.
+
+ Permission is granted to copy, distribute and/or modify
+ this document under the terms of the GNU Free
+ Documentation License, Version 1.3 or any later version
+ published by the Free Software Foundation; with no
+ Invariant Sections, no Front-Cover Texts, and no
+ Back-Cover Texts. A copy of the license is included in the
+ section entitled \enquote{GNU Free Documentation
+ License}.
+\end{quote}
+
+If you have Invariant Sections, Front-Cover Texts and
+Back-Cover Texts, replace the \enquote{with \dots\ Texts.}\
+line with this:
+
+\begin{quote}
+ with the Invariant Sections being LIST THEIR TITLES, with
+ the Front-Cover Texts being LIST, and with the Back-Cover
+ Texts being LIST.
+\end{quote}
+
+If you have Invariant Sections without Cover Texts, or some
+other combination of the three, merge those two alternatives
+to suit the situation.
+
+If your document contains nontrivial examples of program
+code, we recommend releasing these examples in parallel
+under your choice of free software license, such as the GNU
+General Public License, to permit their use in free
+software. \ No newline at end of file
diff --git a/macros/latex/contrib/gfdl/gfdl.dtx b/macros/latex/contrib/gfdl/gfdl.dtx
new file mode 100644
index 0000000000..464ba10f80
--- /dev/null
+++ b/macros/latex/contrib/gfdl/gfdl.dtx
@@ -0,0 +1,629 @@
+% \iffalse meta-comment
+%
+% File: gfdl.dtx
+% -------------------------------------------------------------
+% Package: gfdl
+% Version: v0.1 (January 1, 2023)
+% Author: निरंजन
+% Description: For using GFDL in LaTeX.
+% Repository: https://puszcza.gnu.org.ua/projects/gfdl-tex
+% License: GPLv3+, GFDLv1.3+
+% -------------------------------------------------------------
+%
+% The LaTeX package gfdl v0.1
+% Copyright © 2022, 2023 निरंजन
+%
+% This program is free software: you can redistribute it
+% and/or modify it under the terms of the GNU General Public
+% License as published by the Free Software Foundation,
+% either version 3 of the License, or (at your option) any
+% later version.
+%
+% This program is distributed in the hope that it will be
+% useful, but WITHOUT ANY WARRANTY; without even the implied
+% warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+% PURPOSE. See the GNU General Public License for more
+% details.
+%
+% You should have received a copy of the GNU General Public
+% License along with this program. If not, see
+% <https://www.gnu.org/licenses/>.
+% \fi
+% \iffalse
+%<*internal>
+\iffalse
+%</internal>
+%<*readme>
+-------------------------------------------------------------
+Package: gfdl
+Version: v0.1 (January 1, 2023)
+Author: निरंजन
+Description: For using GFDL in LaTeX.
+Repository: https://puszcza.gnu.org.ua/projects/gfdl-tex
+License: GPLv3+, GFDLv1.3+
+-------------------------------------------------------------
+%</readme>
+%<*internal>
+\fi
+%</internal>
+%<*driver>
+\documentclass{l3doc}
+\usepackage{xcolor}
+\usepackage{fontawesome5}
+\usepackage{gfdl}
+\usepackage{fontspec}
+\usepackage{hyperref,hyperxmp}
+\colorlet{myblue}{blue!60!black}
+\colorlet{myred}{red!60!black}
+\colorlet{mygreen}{green!60!black}
+\hypersetup{%
+ unicode,%
+ colorlinks,%
+ urlcolor = {myblue},%
+ linkcolor = {myred},%
+ citecolor = {mygreen},%
+ pdftitle = {The gfdl package},%
+ pdfauthor = {निरंजन},%
+ pdfsubject = {For using GFDL in LaTeX.},%
+ pdfcreator = {निरंजन},%
+ pdfkeywords = {%
+ GFDL, LaTeX, FSF, Licensing, Documentation%
+ },%
+ pdfcopyright = {%
+ The LaTeX package gfdl\textLF
+ Copyright © 2022, 2023 निरंजन\textLF
+ Permission is granted to copy, distribute and/or modify
+ this document under the terms of the GNU Free
+ Documentation License, Version 1.3 or any later version
+ published by the Free Software Foundation; with no
+ Invariant Sections, no Front-Cover Texts, and no
+ Back-Cover Texts. A copy of the license is included in
+ the section entitled “GNU Free Documentation License”.%
+ },%
+ pdflicenseurl = {%
+ https://www.gnu.org/licenses/fdl-1.3.txt%
+ }%
+}%
+\usepackage{cleveref}
+\newfontfamily\devanagari[%
+ Script = {Devanagari},%
+ Renderer = {Harfbuzz},%
+ Scale = {0.8}%
+]%
+{Shobhika}
+\NewDocumentEnvironment{dedication}{ }{%
+ % Based on egreg's answer:
+ % https://tex.stackexchange.com/a/102849
+ \clearpage % for a new page.
+ \thispagestyle{empty}% no header and footer.
+ \vspace*{\stretch{1}}% some space at the top.
+ \itshape % to get the text in italics.
+ \raggedleft % flush to the right margin.
+}{%
+ \par % end the paragraph
+ \vspace{\stretch{3}}%% space at bottom is three times that
+ \clearpage %% at the top finish off the page.
+}
+\NewCommandCopy\oldamp\&
+\renewcommand*{\&}{\textit{\oldamp}}
+\gfdlcopyrightdescription{The \LaTeX\ package \pkg{gfdl}}
+\gfdlcopyrightholders{\texorpdfstring{{\devanagari निरंजन}}{निरंजन}}
+\gfdlcopyrightableyears{2022, 2023}
+
+\begin{document}
+\DocInput{\jobname.dtx}
+\end{document}
+%</driver>
+% \fi
+% \title{The \pkg{gfdl} package}
+% \author{^^A
+% {^^A
+% \devanagari
+% निरंजन^^A
+% }^^A
+% \thanks{^^A
+% \href{mailto:hi.niranjan@pm.me}^^A
+% {\texttt{hi.niranjan@pm.me}}^^A
+% }^^A
+% }
+% \date{^^A
+% Version 0.1^^A
+% ---^^A
+% January 1, 2023\\[1ex]^^A
+% {^^A
+% \small\faIcon{link}\quad
+% \url{https://ctan.org/pkg/gfdl}^^A
+% }\\^^A
+% {^^A
+% \small\faIcon{bug}\quad
+% \url{https://puszcza.gnu.org.ua/bugs/?group=gfdl-tex}^^A
+% }^^A
+% }
+%
+% \maketitle
+%
+% \begin{documentation}
+% \begin{abstract}
+% The GFDL is a popular license used for programming
+% manuals, documentations \& various other textual works
+% too, but using this license with \LaTeX\ isn't very
+% convenient. This package aims to help users in easily
+% using the license without violating any rules of the
+% license. With a handful of commands, users can rest
+% assured that their document will be perfectly licensed
+% under GFDL.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \begin{dedication}
+% Dedicated to the FSF \& it's continuous fight for
+% the freedom of software\dots
+% \end{dedication}
+%
+% \section*{Acknowledgment}
+%
+% I acknowledge my friend Sahil Patel for reviewing the
+% output of this package \& suggesting some corrections.
+% I would also like to thank Karl Berry for pointing out
+% some critical issues in my package \& suggesting
+% alternative ways of dealing with them. This package
+% modifies \& uses a few \LaTeX-files provided on the
+% web-pages of respective versions of GFDL\footnote{^^A
+% GFDLv1.3:
+% \texttt{^^A
+% \url{https://www.gnu.org/licenses/fdl-1.3.tex}^^A
+% }.\\^^A
+% GFDLv1.2:
+% \texttt{^^A
+% \url{https://www.gnu.org/licenses/fdl-1.2.tex}^^A
+% }.\\^^A
+% GFDLv1.1:
+% \texttt{^^A
+% \url{https://www.gnu.org/licenses/fdl-1.1.tex}^^A
+% }.\\^^A
+% } which are unlicensed \& their authors are unknown, but
+% with a few typographic modifications I have used them in
+% the package. I would like to thank FSF/GNU-hackers for
+% providing a basic skeleton of the \LaTeX-files which I
+% could modify.
+%
+% \section{Documentation}
+%
+% This section describes all the macros \& parameters that
+% the package provides.
+%
+% \subsection{Macros}
+%
+% \begin{function}{^^A
+% \gfdlcopyrightdescription,^^A
+% \gfdlcopyrightableyears,^^A
+% \gfdlcopyrightholders
+% }
+% \begin{syntax}
+% \cs{gfdlcopyrightdescription}\marg{project-description}
+% \cs{gfdlcopyrightableyears}\marg{copyright-able years}
+% \cs{gfdlcopyrighthoders}\marg{copyright-holders}
+% \end{syntax}
+% The names of these macros are pretty self-explanatory.
+% These macros store the information which is then printed
+% automatically at necessary places. Only if one has
+% loaded the |manual| option (documented in \cref{opts});
+% they will have to use the macros following this one to
+% print the notice \& the license-text.
+% \end{function}
+%
+% \begin{function}{\printgfdlnotice}
+% This text prints the copyright-notice. \LaTeX's
+% float-mechanism is used for printing it. It is printed
+% on the first page of the document with default
+% settings. With option |manual| user is free to print it
+% anywhere, but not printing it will produce an error.
+% \end{function}
+%
+% \begin{function}{\printgfdltext}
+% This text prints the entire license text. In default
+% settings this command is run after the last page of the
+% document. With option |manual|, the user is free to use
+% it anywhere, but not using it will produce an error.
+% \end{function}
+%
+% \subsection{Options}
+% \label{opts}
+%
+% \begin{function}{manual}
+% By default the package prints the copyright-notice along
+% with the license-text of GFDL in the document by
+% default. The former is printed at the bottom of the
+% first page whereas the latter is printed just after the
+% last page. If anyone wants to suppress this behavior \&
+% print both of these things anywhere in the document with
+% \cs{printgfdlnotice} \& \cs{printgfdltext} as documented
+% earlier.
+% \end{function}
+%
+% \subsubsection{Legacy support}
+%
+% The following options are just for legacy support \&
+% should be avoided for newer works. It is advised to use
+% these options only when the document demands certain old
+% conventions which are obsolete these days.
+%
+% \begin{function}{(C)}
+% The \textcopyright\ symbol was at times written as (C)
+% \& if someone needs to use this style, then they can use
+% this package-option. The package essentially prints this
+% symbol at two places. One in the actual PDF text \& one
+% in it's metadata. At both of these places users will see
+% the change if this option is used. By default this
+% option is inactive.
+% \end{function}
+%
+% \begin{function}{version}
+% \begin{syntax}
+% |version|=\marg{version-number}\hfill ^^A
+% |1.1|, |1.2| \textit{or} \textcolor{myred}{|1.3|}
+% \end{syntax}
+% 1.3 is the current version of GFDL, but there were two
+% old versions before it (i.e., 1.2 \& 1.1). By default
+% the latest version is used, but with this package
+% option, users can select previous versions too. It is
+% important to note that as of now this option does
+% \emph{not} allow any other value than |1.1|, |1.2| \&
+% \textcolor{myred}{|1.3|}.
+%
+% If a newer version is released by the FSF, the default
+% behavior of the package will most likely change to
+% produce the latest version of GFDL at that time. In that
+% case recompiling an old document with the new version of
+% this package will break your documents, but as a
+% developer I find that incompatibility reasonable \&
+% desirable, because I believe using the newer versions of
+% this license will only help the cause for which hackers
+% are fighting.
+% \end{function}
+% \end{documentation}
+%
+% \begin{implementation}
+% \section{Implementation}
+%
+% Provide package with its basic information.
+%
+% \begin{macrocode}
+%<*package>
+\ProvidesPackage{gfdl}[2023/01/01 v0.1
+For using the GFDL in LaTeX.]
+% \end{macrocode}
+%
+% Load necessary packages.
+%
+% \begin{macrocode}
+\RequirePackage{float}
+\RequirePackage{expkv-def,expkv-opt}
+% \end{macrocode}
+%
+% Define conditionals which we will be using in the package
+% \& set some initial values for them.
+%
+% The package issues a warning if copyright-holders aren't
+% declared \& it doesn't print the GFDL-notice in this case,
+% because a copyright-notice without copyright-holders makes
+% no sense. The following conditional is at work for this.
+%
+% \begin{macrocode}
+\newif\ifgfdl@copyrightholdersgiven
+\gfdl@copyrightholdersgivenfalse
+% \end{macrocode}
+%
+% With the following code we first define various internal
+% conditionals which we require. We also set their initial
+% values here.
+%
+% \begin{macrocode}
+\newif\ifgfdl@copyrightableyearsgiven
+\gfdl@copyrightableyearsgivenfalse
+\newif\ifgfdl@copyrightedmaterialdesc
+\gfdl@copyrightedmaterialdescfalse
+\newif\ifgfdl@licensetextnotprinted
+\gfdl@licensetextnotprintedtrue
+\newif\ifgfdl@noticenotprinted
+\gfdl@noticenotprintedtrue
+% \end{macrocode}
+%
+% Define package options with \pkg{expkv}.
+%
+% \begin{macrocode}
+\ekvdefinekeys{gfdl}{
+% \end{macrocode}
+%
+% \begin{macro}{manual}
+%
+% The |invbool| type is used to define package option
+% |manual|\footnote{Read the documentation of \pkg{expkv}
+% for explanation.}. We define the conditional
+% |\ifgfdl@printgfdl| with it.
+%
+% \begin{macrocode}
+ invbool manual = {\ifgfdl@printgfdl},
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{(C)}
+%
+% The following code defines the package option |(C)|
+% which defines an internally used conditional
+% |\ifgfdl@bracketedcopyright|. The default value of this
+% conditional is false.
+%
+% \begin{macrocode}
+ bool (C) = {\ifgfdl@bracketedcopyright},
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{version}
+%
+% The following code develops the option |version| which
+% takes three options seen in the documentation. By using
+% the |initial| key-type, we set the initial value of this
+% option to |1.3|.
+%
+% \begin{macrocode}
+ choice version = {%
+ 1.1 = {\def\gfdl@version{1p1}},%
+ 1.2 = {\def\gfdl@version{1p2}},%
+ 1.3 = {\def\gfdl@version{1p3}}%
+ },
+ initial version = {1.3}
+}
+% \end{macrocode}
+% \end{macro}
+%
+% After developing all the options, we set process them with
+% the following code.
+%
+% \begin{macrocode}
+\ekvoProcessLocalOptions{gfdl}
+% \end{macrocode}
+%
+% We have used the |bool| type from \pkg{expkv} for
+% developing the package option |(C)|. It defines the
+% conditional |\ifgfdl@bracketedcopyright| which is by
+% default false. We use an internal macro, i.e.,
+% |\gfdl@copyrightsymbol| for printing the copyright symbol
+% with the following code. We |\let| it be |\textcopyright|
+% when the aforementioned conditional is false \& it is
+% defined as |(C)| when the conditional is true (i.e., when
+% the option is explicitly used by the user).
+%
+% \begin{macrocode}
+\ifgfdl@bracketedcopyright
+ \def\gfdl@copyrightsymbol{(C)}%
+\else
+ \let\gfdl@copyrightsymbol\textcopyright
+\fi
+% \end{macrocode}
+%
+% \begin{macro}{\gfdlcopyrightdescription}
+% The following |\NewDocumentCommand| is used to develop
+% this command.
+% \begin{macrocode}
+\NewDocumentCommand{ \gfdlcopyrightdescription }{ m }{%
+ \def\@copyrightedmaterialdesc{#1}%
+ \gfdl@copyrightedmaterialdesctrue
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\gfdlcopyrightableyears}
+% For this command we have the following code.
+% \begin{macrocode}
+\NewDocumentCommand{ \gfdlcopyrightableyears }{ m }{%
+ \def\@copyrightableyears{#1}%
+ \gfdl@copyrightableyearsgiventrue
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\gfdlcopyrightholders}
+% And lastly, we have this command coded as follows.
+% \begin{macrocode}
+\NewDocumentCommand{ \gfdlcopyrightholders }{ m }{%
+ \def\@copyrightholders{#1}%
+ \gfdl@copyrightholdersgiventrue
+}
+% \end{macrocode}
+% \end{macro}
+% We issue a warning when copyright-able years are not
+% given. The following code generates the warning. We define
+% the internal macro containing the copyright-able years as
+% |??| in bold font here itself.
+% \begin{macrocode}
+\AddToHook{begindocument/before}{%
+ \ifgfdl@copyrightableyearsgiven
+ \else
+ \def\@copyrightableyears{\textbf{??}}%
+ \PackageWarningNoLine{gfdl}{%
+ Copyright-able years not given. I can't print the
+ \MessageBreak
+ copyright notice without them. To give me this
+ \MessageBreak
+ information use the \string\gfdlcopyrightableyears\space
+ command.\MessageBreak Using `??' as a placeholder%
+ }%
+ \fi
+% \end{macrocode}
+% The following code is used to check if user has given
+% information about copyright-holders. If not, then we issue
+% a warning with this code \& again define the internal
+% macro containing this information as bold |??|.
+% \begin{macrocode}
+ \ifgfdl@copyrightholdersgiven
+ \else
+ \def\@copyrightholders{\textbf{??}}%
+ \PackageWarningNoLine{gfdl}{%
+ Copyright-holders not given. I can't print the
+ \MessageBreak
+ copyright notice without them. To give me this
+ \MessageBreak
+ information use the \string\gfdlcopyrightholders\space
+ command.\MessageBreak Using `??' as a placeholder%
+ }%
+ \fi
+% \end{macrocode}
+%
+% With default settings of this package, \pkg{hyperref},
+% \pkg{csquotes} \& \pkg{hyperxmp} are loaded, but to avoid
+% potential conflicts, we load them conditionally. With the
+% following code this is achieved.
+%
+% \begin{macrocode}
+ \@ifpackageloaded{csquotes}{}{%
+ \RequirePackage{csquotes}%
+ }%
+ \@ifpackageloaded{hyperref}{}{%
+ \RequirePackage{hyperref}%
+ }%
+ \@ifpackageloaded{hyperxmp}{}{%
+ \RequirePackage{hyperxmp}%
+ }%
+% \end{macrocode}
+%
+% For setting the metadata we use the following code.
+%
+% \begin{macrocode}
+ \hypersetup{%
+ pdfcopyright = {%
+ \ifgfdl@copyrightedmaterialdesc
+ \@copyrightedmaterialdesc
+ \textLF
+ \fi
+ Copyright
+ \gfdl@copyrightsymbol\
+ \@copyrightableyears\
+ \@copyrightholders\textLF
+ Permission is granted to copy, distribute and/or
+ modify this document under the terms of the GNU Free
+ Documentation License, Version 1.3 or any later
+ version published by the Free Software Foundation;
+ with no Invariant Sections, no Front-Cover Texts, and
+ no Back-Cover Texts. A copy of the license is included
+ in the section entitled “GNU Free Documentation
+ License”.%
+ },%
+ pdflicenseurl = {%
+ https://www.gnu.org/licenses/fdl-1.3.txt%
+ }%
+ }%
+}
+% \end{macrocode}
+%
+% Printing the text automatically at the bottom of the first
+% page is achieved with the help of a float. It is developed
+% using package \pkg{float} for the following commands.
+%
+% \begin{macrocode}
+\newfloat{gfdl@float}{b}{delme}
+% \end{macrocode}
+%
+% \begin{macro}{\printgfdlnotice}
+% This command is developed using the following code.
+% \begin{macrocode}
+\NewDocumentCommand{ \printgfdlnotice }{ }{%
+ \begin{gfdl@float}[b!]
+ \hrule\medskip
+ \ifgfdl@copyrightedmaterialdesc
+ \@copyrightedmaterialdesc\par
+ \fi
+ Copyright
+ \gfdl@copyrightsymbol\
+ \@copyrightableyears\
+ \@copyrightholders
+
+ Permission is granted to copy, distribute and/or modify
+ this document under the terms of the GNU Free
+ Documentation License, Version 1.3 or any later version
+ published by the Free Software Foundation; with no
+ Invariant Sections, no Front-Cover Texts, and no
+ Back-Cover Texts. A copy of the license is included in
+ the section entitled \enquote{%
+ GNU Free Documentation License%
+ }.%
+ \end{gfdl@float}%
+ \gfdl@noticenotprintedfalse
+}
+% \end{macrocode}
+% \end{macro}
+%
+% We use |\printgfdlnotice| at the first page of the
+% document with the following code.
+%
+% \begin{macrocode}
+\AddToHook{begindocument/end}{%
+ \ifgfdl@printgfdl
+ \printgfdlnotice
+ \fi
+}
+% \end{macrocode}
+%
+% \begin{macro}{\printgfdltext}
+%
+% The following code is used to define this command.
+%
+% \begin{macrocode}
+\NewDocumentCommand{ \printgfdltext }{ }{%
+ \input{gfdl-tex-\gfdl@version.tex}%
+ \gfdl@licensetextnotprintedfalse
+}
+% \end{macrocode}
+% \end{macro}
+%
+% In default settings the entire license text is printed
+% with the following code.
+%
+% \begin{macrocode}
+\AddToHook{enddocument}{%
+ \ifgfdl@printgfdl
+ \newpage
+ \phantomsection
+ \addcontentsline{toc}{section}{%
+ GNU Free Documentation License%
+ }%
+ \printgfdltext
+ \fi
+ \ifgfdl@noticenotprinted
+ \PackageError{gfdl}{%
+ You didn't print the copyright notice%
+ }{%
+ You are in the `manual' mode of the GFDL package and
+ hence you\MessageBreak are supposed to print the
+ copyright notice at a suitable place\MessageBreak of
+ your choice, but you haven't printed it at all. This
+ violates\MessageBreak the requirement of the GFDL. To
+ print it use:\MessageBreak
+ \space\space\string\printgfdlnotice.%
+ }%
+ \fi
+ \ifgfdl@licensetextnotprinted
+ \PackageError{gfdl}{%
+ You didn't print the license text%
+ }%
+ {%
+ You are in the `manual' mode of the GFDL package and hence you%
+ \MessageBreak
+ are supposed to print the full license text at a suitable place%
+ \MessageBreak
+ of your choice, but you haven't printed it at all. This violates%
+ \MessageBreak
+ the requirement of the GFDL. To print it use:%
+ \MessageBreak
+ \space\space\string\printgfdltext.%
+ }%
+ \fi
+}
+% \end{macrocode}
+%
+% This is the end of the package.
+%
+% \begin{macrocode}
+%</package>
+% \end{macrocode}
+% \end{implementation}
+% \Finale \ No newline at end of file
diff --git a/macros/latex/contrib/gfdl/gfdl.ins b/macros/latex/contrib/gfdl/gfdl.ins
new file mode 100644
index 0000000000..e8bae2e677
--- /dev/null
+++ b/macros/latex/contrib/gfdl/gfdl.ins
@@ -0,0 +1,46 @@
+% File: linguistix.ins
+\input l3docstrip.tex
+
+\keepsilent
+\askforoverwritefalse
+
+\preamble
+----------------------------------------------------------
+Package: gfdl
+Version: v0.1 (January 1, 2023)
+Author: निरंजन
+Description: Enhanced support for linguistics.
+Repository: https://puszcza.gnu.org.ua/projects/gfdl
+License: GPLv3+, GFDLv1.3+
+----------------------------------------------------------
+
+The LaTeX package gfdl v0.1
+Copyright © 2022, 2023 निरंजन
+
+This program is free software: you can redistribute it
+and/or modify it under the terms of the GNU General Public
+License as published by the Free Software Foundation, either
+version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied
+warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+PURPOSE. See the GNU General Public License for more
+details.
+
+You should have received a copy of the GNU General Public
+License along with this program. If not, see
+<https://www.gnu.org/licenses/>.
+----------------------------------------------------------
+\endpreamble
+\usedir{tex/latex/\jobname}
+\generate{%
+ \file{\jobname.sty}{\from{\jobname.dtx}{package}}%
+}
+\nopreamble\nopostamble
+\usedir{doc/latex/\jobname}
+\generate{%
+ \file{README.txt}{\from{\jobname.dtx}{readme}}%
+}
+\endbatchfile
diff --git a/macros/latex/contrib/gfdl/gfdl.pdf b/macros/latex/contrib/gfdl/gfdl.pdf
new file mode 100644
index 0000000000..f240daaa63
--- /dev/null
+++ b/macros/latex/contrib/gfdl/gfdl.pdf
Binary files differ