Add documentation to Org Zettelkasten

3 files changed, 666 insertions, 0 deletions

diff --git a/doc/doc-setup.org b/doc/doc-setup.org
new file mode 100644
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+# SETUPFILE for Org manual
+
+# Copyright (C) 2021-2022 Free Software Foundation, Inc.
+#
+# This file is part of GNU Emacs.
+#
+# GNU Emacs 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.
+#
+# GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+#+todo: REVIEW TODO | DONE
+#+property: header-args :eval no
+#+startup: overview nologdone
+
+# Use proper quote and backtick for code sections in PDF output
+# Cf. Texinfo manual 14.2
+#+texinfo_header: @set txicodequoteundirected
+#+texinfo_header: @set txicodequotebacktick
+
+# Contact Info
+#+texinfo_header: @set MAINTAINERSITE @uref{https://yannherklotz.com,maintainers webpage}
+#+texinfo_header: @set MAINTAINER Yann Herklotz
+#+texinfo_header: @set MAINTAINEREMAIL @email{yann@ymhg.org}
+#+texinfo_header: @set MAINTAINERCONTACT @uref{mailto:yann@ymhg.org,contact the maintainer}
+
+#+options: H:4 num:t toc:t author:t \n:nil ::t |:t ^:nil -:t f:t *:t <:t e:t ':t
+#+options: d:nil todo:nil pri:nil tags:not-in-toc stat:nil broken-links:mark
+#+select_tags: export
+#+exclude_tags: noexport
+
+#+macro: cite @@texinfo:@cite{@@$1@@texinfo:}@@
+#+macro: var @@texinfo:@var{@@$1@@texinfo:}@@
+
+# The "version" macro extracts "Version" keyword from "org.el".  It
+# returns major.minor version number.  This is sufficient since bugfix
+# releases are not expected to add features and therefore imply manual
+# modifications.
+#+macro: version (eval (with-current-buffer (find-file-noselect "../org-zettelkasten.el") (org-with-point-at 1 (if (re-search-forward "Version: +\\([0-9.]+\\)" nil t) (mapconcat #'identity (cl-subseq (split-string (match-string-no-properties 1) "\\.") 0 2) ".") (error "Missing \"Version\" keyword in \"org.el\"")))))
+
+# The "kbd" macro turns KBD into @kbd{KBD}.  Additionally, it
+# encloses case-sensitive special keys (SPC, RET...) within @key{...}.
+#+macro: kbd (eval (org-texinfo-kbd-macro $1))
diff --git a/doc/fdl.org b/doc/fdl.org
new file mode 100644
index 0000000..81e2cd9
--- /dev/null
+++ b/doc/fdl.org
@@ -0,0 +1,489 @@
+# The GNU Free Documentation License.
+#+begin_center
+Version 1.3, 3 November 2008
+#+end_center
+
+# This file is intended to be included within another document.
+
+#+begin_verse
+Copyright \copy{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+https://fsf.org/
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+#+end_verse
+
+0. [@0] PREAMBLE
+
+   The purpose of this License is to make a manual, textbook, or other
+   functional and useful document @@texinfo:@dfn{@@free@@texinfo:}@@
+   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 "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.
+
+1. APPLICABILITY AND DEFINITIONS
+
+   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
+   "Document", below, refers to any such manual or work.  Any member
+   of the public is a licensee, and is addressed as "you".  You accept
+   the license if you copy, modify or distribute the work in a way
+   requiring permission under copyright law.
+
+   A "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 "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 "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 "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 "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
+   "Transparent" is called "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 "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, "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 "publisher" means any person or entity that distributes copies
+   of the Document to the public.
+
+   A section "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
+   "Acknowledgements", "Dedications", "Endorsements", or "History".)
+   To "Preserve the Title" of such a section when you modify the
+   Document means that it remains a section "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.
+
+2. VERBATIM COPYING
+
+   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.
+
+3. COPYING IN QUANTITY
+
+   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.
+
+4. MODIFICATIONS
+
+   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:
+
+   #+attr_texinfo: :enum A
+   1. 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.
+
+   2. 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.
+
+   3. State on the Title page the name of the publisher of the
+      Modified Version, as the publisher.
+
+   4. Preserve all the copyright notices of the Document.
+
+   5. Add an appropriate copyright notice for your modifications
+      adjacent to the other copyright notices.
+
+   6. 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.
+
+   7. Preserve in that license notice the full lists of Invariant
+      Sections and required Cover Texts given in the Document's
+      license notice.
+
+   8. Include an unaltered copy of this License.
+
+   9. Preserve the section Entitled "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 "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.
+
+   10. 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.
+
+   11. For any section Entitled "Acknowledgements" or "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.
+
+   12. 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.
+
+   13. Delete any section Entitled "Endorsements". Such a section may
+       not be included in the Modified Version.
+
+   14. Do not retitle any existing section to be Entitled
+       "Endorsements" or to conflict in title with any Invariant
+       Section.
+
+   15. Preserve any Warranty Disclaimers.
+
+   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 "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.
+
+5. COMBINING DOCUMENTS
+
+   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
+   "History" in the various original documents, forming one section
+   Entitled "History"; likewise combine any sections Entitled
+   "Acknowledgements", and any sections Entitled "Dedications".  You
+   must delete all sections Entitled "Endorsements."
+
+6. COLLECTIONS OF DOCUMENTS
+
+   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.
+
+7. AGGREGATION WITH INDEPENDENT WORKS
+
+   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 "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.
+
+8. TRANSLATION
+
+   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 "Acknowledgements",
+   "Dedications", or "History", the requirement (section 4) to
+   Preserve its Title (section 1) will typically require changing the
+   actual title.
+
+9. TERMINATION
+
+   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.
+
+10. FUTURE REVISIONS OF THIS LICENSE
+
+    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
+    https://www.gnu.org/copyleft/.
+
+    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.  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.
+
+11. RELICENSING
+
+    "Massive Multiauthor Collaboration Site" (or "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 "Massive Multiauthor Collaboration" (or "MMC")
+    contained in the site means any set of copyrightable works thus
+    published on the MMC site.
+
+    "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.
+
+    "Incorporate" means to publish or republish a Document, in whole
+    or in part, as part of another Document.
+
+    An MMC is "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.
+
+#+texinfo: @page
+
+* ADDENDUM: How to use this License for your documents
+:PROPERTIES:
+:UNNUMBERED: notoc
+:END:
+
+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_example
+    Copyright (C)  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 ``GNU
+    Free Documentation License''.
+#+end_example
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the "with...Texts."\nbsp{}line with this:
+
+#+begin_example
+      with the Invariant Sections being LIST THEIR TITLES, with
+      the Front-Cover Texts being LIST, and with the Back-Cover Texts
+      being LIST.
+#+end_example
+
+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.
diff --git a/doc/org-zettelkasten-manual.org b/doc/org-zettelkasten-manual.org
new file mode 100644
index 0000000..e5b424b
--- /dev/null
+++ b/doc/org-zettelkasten-manual.org
@@ -0,0 +1,126 @@
+#+title: Org Zettelkasten Manual
+#+subtitle: Release {{{version}}}
+#+author: Yann Herklotz
+#+language: en
+
+#+texinfo: @insertcopying
+
+* Introduction
+:PROPERTIES:
+:DESCRIPTION: Getting started.
+:END:
+#+cindex: introduction
+
+Niklas Luhmann’s Zettelkasten is becoming increasingly popular for being a great
+note taking technique. However, it is often misunderstood as taking notes
+without any structure, whereas Luhmann actually structured his notes
+hierarchically, but also allowed for arbitrary links between notes. This post
+will describe the general note-taking workflow that Luhmann used and a practical
+implementation of the Zettelkasten in Emacs’ built-in org-mode, which I have
+been using regularly for my notes and has been working well.
+
+** Inserting new notes
+#+cindex: notes
+
+There are several possible notes that can be inserted into the Zettelkasten, but
+the need for them should arise naturally and one therefore doesn’t have to think
+about the separate types of notes directly. In addition to the following types
+of notes, Luhmann also had a separate box for references and notes about those
+references, however, these are not added to the Zettelkasten in my case because
+I felt like using tools specifically to keep track of references is a better
+system for me. This is mentioned further in the keeping track of references
+section.
+
+*** Permanent Notes
+#+cindex: notes
+
+Inserting new notes into the Zettelkasten can be done for any new piece of
+information one wants to permanently add to the tree of notes and therefore the
+network of notes. These are therefore called “permanent notes,” however, these
+are not the only notes that may appear in the network. The most important thing
+to take into consideration is that “permanent notes” should be completely in
+your own words, and express an idea that also links to other parts in the
+network. At the start it may be necessary to create a few topics that these
+notes fit into, however, eventually one should be able to find notes that are
+similar enough which this new note should follow.
+
+*** Index notes
+#+cindex: notes
+
+Apart from that, there can also be “index notes,” which try to give some
+structure to a subsection that may have gotten lost with all of the branches
+that may have been added. In addition to that, these may tie in other notes from
+other topics as well that relate to that topic. These can therefore just be
+added whenever you feel like there are too many notes for a subtopic and cannot
+keep track of all the possible links.
+
+** Keeping track of references
+#+cindex: references
+
+Luhmann kept track of references by inserting them into their own box in a
+linear structure and then referring to them by ID whenever they needed to be
+cited. These are often called “bibliographical notes.” In addition to that,
+notes that were not permanent and more relevant to a specific paper or book were
+also added separately to the other notes and were called “literature notes,” as
+these often contained summaries of the papers or books that were cited. Even
+though these were written in his own words, they only really were relevant to
+the paper itself as temporary notes, which could eventually be added as
+“permanent notes” into the Zettelkasten and linked to other notes when a
+narrative developed that did link this piece of knowledge to other notes.
+
+As references are quite separate to the other notes anyways, I prefer to keep
+them quite separate as well, and instead use standard bibliography management
+tools to keep track of all my references as well as linking notes to the
+references in the tool itself. In my case this is using ebib in Emacs, however,
+any alternative works as well, such as Zotero.
+
+In my notes, I then reference these by their bibtex identifier that is
+automatically generated, and which is later used when referencing the same
+literature in LaTeX, for example. This allows me to keep these notes quite
+separate and forces me to think about links when I do eventually add them to the
+network as “permanent notes.”
+
+* GNU Free Documentation License
+:PROPERTIES:
+:APPENDIX: t
+:DESCRIPTION: The license for this documentation.
+:END:
+
+#+include: fdl.org
+
+* Main Index
+:PROPERTIES:
+:INDEX:    cp
+:DESCRIPTION: An index of Org Zettelkasten concepts and features.
+:END:
+
+* Copying
+:PROPERTIES:
+:copying: t
+:END:
+
+This manual is for Org Zettelkasten version {{{version}}}.
+
+Copyright \copy 2022  Yann Herklotz.
+
+#+begin_quote
+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, with the Front-Cover Texts being "A GNU Manual,"
+and with the Back-Cover Texts as in (a) below.  A copy of the license
+is included in the section entitled "GNU Free Documentation License."
+
+(a) The FSF's Back-Cover Text is: "You have the freedom to copy and
+modify this GNU manual."
+#+end_quote
+
+* Export Setup :noexport:
+
+#+setupfile: doc-setup.org
+
+#+export_file_name: org-zettelkasten.texi
+
+#+texinfo_dir_category: Zettelkasten
+#+texinfo_dir_title: Org Zettelkasten
+#+texinfo_dir_desc: A Zettelkasten mode leveraging Org