path: root/Master/texmf-dist/doc/latex/latex-tds/README

============================
README for project latex-tds
============================

Heiko Oberdiek
2014/05/15


Table of Contents
=================

    1. Project latex-tds
       1.1. How it has started
       1.2. Goals of the project
       1.3. Scope
       1.4. Module list
    2. Abbreviations, Glossary
    3. Download
    4. Installation Hints
       4.1. Hints
    5. Copyright, License
    6. Manifest
       6.1. Documentation
       6.2. Licenses
       6.3. Scripts
       6.4. Configuration
       6.5. Documentation driver
       6.6. Patches
    7. Design Principles
    8. Remarks
       8.1. Base
       8.2. Tools
       8.3. Knuth
       8.4. e-TeX
    9. Build Hints
   10. History


1. Project latex-tds
=====================

Bundle `latex-tds' provides a set of ZIP file modules containing TDS-compliant
trees for items of the LaTeX distribution (both the base system and required
packages), together with `user-friendly' documentation (PDF files with
navigation support using bookmarks and links).

Version:

    2014/05/15

Author:

    Heiko Oberdiek

Email and bug report address:

    heiko.oberdiek at googlemail.com

CTAN home page with distribution files:

    CTAN:macros/latex/contrib/latex-tds/

Source repository (without distribution files):

    https://github.com/oberdiek/latex-tds

1.1. How it has started
------------------------

The project started as I wanted to install the new LaTeX release 2005/12/01
that was announced at 2006/04/27. However the files are not packed in TDS
format, ready for unpacking in the destination directory. And the documentation
files were not yet generated or the provided PDF files are lacking of basic
features such as bookmarks or link support. Thus this project has started. I
thought it could be finished during the afternoon at the day of the
announcement …

1.2. Goals of the project
--------------------------

  • From the sources a TDS compliant tree is constructed and populated. The
    zipped result is distributed.

  • All the documentation is generated from the sources. The PDF files are user
    friendly and provide navigational support with bookmarks and links.

  • The PDF files are post-processed to reduce the file size.

1.3. Scope
-----------

I do not have the time to assemble a TeX distribution with thousands of
packages. Therefore I restricted myself to the LaTeX base distribution and the
required bundles. In the following I will use the term ‘module’ for a package
bundle.

1.4. Module list
-----------------

The link addresses are the sources for the modules.

base

    CTAN:macros/latex/base.zip
    CTAN:macros/latex/doc.zip
    http://www.latex-project.org/guides/lb2.err
    http://www.latex-project.org/guides/lgc2.err
    http://www.latex-project.org/guides/manual.err
    http://www.latex-project.org/guides/tlc2.err

tools

    CTAN:macros/latex/required/tools.zip

cyrillic

    CTAN:macros/latex/required/cyrillic.zip

amslatex

    CTAN:install/macros/latex/required/amslatex/amscls.tds.zip
    CTAN:install/macros/latex/required/amslatex/math.tds.zip
    CTAN:macros/latex/contrib/amsrefs.zip
    CTAN:macros/latex/required/amslatex.zip
    ftp://ftp.ams.org/pub/tex/amsrefs/amsrefs.zip
    ftp://ftp.ams.org/pub/tex/amscls.zip
    ftp://ftp.ams.org/pub/tex/amsmath.zip

amsfonts

    CTAN:install/fonts/amsfonts.tds.zip

psnfss

    CTAN:macros/latex/required/psnfss.zip

tds

    CTAN:tds.zip

knuth

    CTAN:systems/knuth/dist/errata.zip
    CTAN:systems/knuth/dist/etc.zip
    CTAN:systems/knuth/dist/mfware.zip
    CTAN:systems/knuth/dist/texware.zip
    CTAN:systems/knuth/dist/web.zip
    CTAN:systems/knuth/dist/tex.zip
    CTAN:systems/knuth/dist/mf.zip

etex

    CTAN:systems/e-tex/v2.1/etex_doc.zip


2. Abbreviations, Glossary
===========================

CTAN

    Comprehensive TeX Archive Network.
    FAQ entry: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=archives
    For example, you can resolve the prefix CTAN: by using http://
    mirror.ctan.org/.

latex-tds

    The name of this project.

TDS

    TeX Directory Structure.
    FAQ entry: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=tds
    Specification: http://www.ctan.org/pkg/tds


3. Download
============

The home of the project is located at:

CTAN:macros/latex/contrib/latex-tds/

The following files can be downloaded:

  • README, README.html, README.pdf: The README file in different formats.

  • <module>.tds.zip: The module distribution files, see section ‘Module list’
    above for the available modules.

  • source.tds.zip: The sources, mainly the build script, configuration and
    driver files, and patches. Some of the used tools are not provided, see
    section ‘Build Hints’.

  • latex-tds.tds.zip: The universe, the contents of all the ZIP files above,
    merged together.


4. Installation Hints
======================

Hopefully the result of this project helps you in the installation process. You
get a TDS compliant tree just by unpacking.

Example:

  cd /some/where/texmf
  unzip latex-tds

or unzip’s option -d:

  unzip latex-tds -d /some/where/texmf

Instead of the universe ZIP file single modules can be selected.

Important to remember, point your unpack process right in the root directory of
your TDS tree. The directory structure in the ZIP files start with the
top-level directories:

  doc/latex/base/...
  tex/latex/tools/...
  source/...

Rationale: The root directory of a TDS tree can have different names, such as
texmf-dist, texmf-local, …

4.1. Hints
-----------

  • Refresh the file name database.

  • Be aware that unpacking can insert and update files, but never deletes
    obsolete ones. Remainders of previous releases can cause trouble.

  • Depending on the module further installation steps can be necessary,
    consult the module’s own documentation.

4.1.1. Module base

  • The default texsys.cfg that LaTeX provides is put into TDS:tex/latex/base.
    It must be removed, if you need a specialized version. Consult your TeX
    distribution and TDS:doc/latex/base/source2e.pdf (module ltdirchk). Usually
    changes are not required for many TeX distributions such as Unix (web2c),
    MikTeX, …

  • Formats need rebuilding (e.g., fmtutil).

4.1.2. Module psnfss

  • The map files need further configuring (e.g., updmap).

4.1.3. Module graphics

  • Module graphics does not provide all driver files, because some are
    developed independently (pdftex.def, …).


5. Copyright, License
======================

Copyright © 2006-2014 Heiko Oberdiek.

License is LPPL 1.3c:

This work may be distributed and/or modified under the conditions of the LaTeX
Project Public License, either version 1.3 of this license or (at your option)
any later version. The latest version of this license is in

  http://www.latex-project.org/lppl.txt

and version 1.3c or later is part of all distributions of LaTeX version 2005/12
/01 or later.

This work has the LPPL maintenance status ‘maintained’.

The Current Maintainer of this work is Heiko Oberdiek.

See the following section ‘Manifest’ for a list of all files belonging to the
project ‘latex-tds’.


6. Manifest
============

Included are the projects ‘adjust_checksum’ and ‘ziptimetree’. They are
projects of their own.

6.1. Documentation
-------------------

README                      plain text file

README.html                 standalone HTML file

README.pdf                  PDF version

README.asciidoc             main source code in text document format AsciiDoc

README-docinfo.html         source code, read by asciidoc to generate
                            README.html

6.2. Licenses
--------------

license/lppl.txt                LPPL (The LaTeX Project Public License) for
                                latex-tds and adjust_checksum

license/ziptimetree/lgpl.txt    LGPL (GNU Lesser General Public License) for
                                ziptimetree, check-ascii, check-eolspaces

6.3. Scripts
-------------

build.pl                    main script for building the distribution

lib/adjust_checksum.pl      Perl script that runs a DTX file through LaTeX and
                            corrects its \Checksum if necessary

lib/check-ascii.pl          Perl script that looks for non-ASCII characters

lib/check-eolspaces.pl      Perl script that looks for trailing spaces

lib/ziptimetree.pl          Perl script that generates a ZIP file from a
                            directory tree with sorted entries (LGPL)

6.4. Configuration
-------------------

tex/docstrip.cfg            enables TDS feature and creates directories

tex/errata.cfg              for errata lists of latex/base

tex/hyperref.cfg            hyperref configuration file

tex/ltnews.cfg              for LaTeX News of latex/base

tex/ltugboat.cls            setup for class ltugboat

tex/ltxdoc.cfg              setup for class ltxdoc

tex/ltxguide.cfg            setup for the guide manuals in latex/base and
                            required/psnfss

tex/lualatex-tds.ini        init file for format generation for LuaTeX

tex/lualatex-tds2.ini       init file for LuaTeX format without LM Math

tex/manual.cfg              setup for errata list of the LaTeX manual in latex/
                            base

tex/pdflatex-tds.ini        init file for format generation for pdfTeX

tex/tdsguide.cfg            setup for class tdsguide.cls

6.5. Documentation driver
--------------------------

tex/ams.drv                 generic doc driver for files from the amslatex
                            bundle

tex/doc_lppl.tex            doc driver for base/lppl.tex

tex/errata.all              doc driver for knuth/errata/errata.pdf

tex/errata.drv              doc driver for knuth/errata/errata_*.pdf

tex/errorlog.drv            doc driver for knuth/errata/errorlog.tex

tex/etex_man.drv            doc driver for etex/etex_man.tex

tex/knuth.drv               doc driver for knuth/{texware,mfware,etc}+/*.web+

tex/knuth-outline.tex       outline file list for module knuth

tex/ltnews.tex              master file that merges all base/ltnews*.tex

tex/ltxcheck.drv            doc driver with patches for ltxcheck.tex

tex/psnfss2e.drv            doc driver with patches for psnfss2e.tex

tex/tools-overview.cls      class for tools.tex

tex/tools.tex               master file for tools overview, generated by the
                            build.pl script from tools/manifest.txt

6.6. Patches
-------------

Diff/patch file                        Patched file

patch/amsclass.dtx.diff                amslatex/amsclass.dtx

patch/amsfndoc.def.diff                amsfonts/amsfndoc.def

patch/amsfndoc.tex.diff                amsfonts/amsfndoc.tex

patch/amsldoc.tex.diff                 amslatex/amsldoc.tex

patch/changes.tex.diff                 amslatex/amsrefs/changes.tex

patch/encguide.tex.diff                base/encguide.tex

patch/errorlog.tex.diff                knuth/errata/errorlog.tex

patch/logmac.tex.diff                  knuth/errata/logmac.tex

patch/source2e.tex.diff                base/source2e.tex

patch/tlc2.err.diff                    base/tlc2.err

patch/trapman.tex.diff                 knuth/mf/trapman.tex

patch/tripman.tex.diff                 knuth/tex/tripman.tex

patch/utf8ienc.dtx.diff                base/utf8ienc.dtx

patch/webman.tex.diff                  knuth/web/webman.tex


7. Design Principles
=====================

  • Compliance with the latest TDS specification.

  • No redundancy.

  • User friendly PDF files with navigational support:

      □ bookmarks

      □ links

  • Complete documentation. The documentation generation with enhanced PDF
    files is the tricky part and should be saved from the user.

  • Output format of generated documentation is PDF, see above. Other formats
    such as DVI or PS are not generated and provided.

  • Documentation bundles are preferred to many partial documentation files
    (e.g. source2e.pdf or ltnews.pdf).

  • If several expansion stages of a documentation are available, then just the
    most complete expansion stage should be used.

  • Files that do not fit in a program sub tree of TDS stay below TDS:source
    (e.g. latexbug.el from latex/base). Then they do not get lost at least.

  • Page layout: a4paper with reduced vertical margins (exception: ltnews).
    (This also decreases the page number usually.)

  • …


8. Remarks
===========

8.1. Base
----------

  • source2e.pdf is used instead of many single lt*.pdf files.

  • ltnews.pdf is introduced to avoid cluttering the doc directory with many
    single sheet ltnews*.pdf files.

  • Patch for ltfssdcl.dtx: Checksum fixed.

  • …

8.2. Tools
-----------

  • Added: tools.pdf as overview/contents/index file with links and short
    descriptions of the single packages. (It uses the data from manifest.txt).

  • …

8.3. Knuth
-----------

  • Current CTAN → TDS mapping in use: CTAN:systems/knuth/dist → TDS:<toplevel>
    /knuth

  • Unsure where to put trip/trap files. Currently they are put in TDS:source,
    because the documentation files (tripman.pdf, trapman.pdf) are in TDS:doc.
    They lists the trip/trap files already.

  • Not covered is CTAN:systems/knuth/dist/lib/ In TeX Live 2007/2008 the files
    are installed at different locations:

    texmf-dist/fonts/source/public/mflogo/logo10.mf
    texmf-dist/fonts/source/public/mflogo/logo8.mf
    texmf-dist/fonts/source/public/mflogo/logo9.mf
    texmf-dist/fonts/source/public/mflogo/logobf10.mf
    texmf-dist/fonts/source/public/mflogo/logo.mf
    texmf-dist/fonts/source/public/mflogo/logosl10.mf
    texmf-dist/fonts/source/public/misc/grayf.mf
    texmf-dist/fonts/source/public/misc/manfnt.mf
    texmf-dist/fonts/source/public/misc/slant.mf
    texmf-dist/metafont/base/expr.mf
    texmf-dist/metafont/base/io.mf
    texmf-dist/metafont/base/null.mf
    texmf-dist/metafont/base/plain.mf
    texmf-dist/metafont/misc/3test.mf
    texmf-dist/metafont/misc/6test.mf
    texmf-dist/metafont/misc/rtest.mf
    texmf-dist/metafont/misc/test.mf
    texmf-dist/metafont/misc/waits.mf
    texmf-dist/metafont/misc/ztest.mf
    texmf-dist/mft/base/cmbase.mft
    texmf-dist/mft/base/plain.mft
    texmf-dist/tex/generic/misc/null.tex
    texmf-dist/tex/plain/base/manmac.tex
    texmf-dist/tex/plain/base/mftmac.tex
    texmf-dist/tex/plain/base/plain.tex
    texmf-dist/tex/plain/base/story.tex
    texmf-dist/tex/plain/base/testfont.tex
    texmf-dist/tex/plain/base/webmac.tex
    texmf/tex/generic/hyphen/hyphen.tex

8.4. e-TeX
-----------

  • Only the manual ‘etex_man’ is covered by this module.


9. Build Hints
===============

The most important advice I can give: ‘Forget it’! The purpose of the source
files are rather to show, what was done in which way. The *.zip with TDS trees
are the goal of the project, not the build process. Some remarks, if someone
wants to build the modules himself:

  • TeX compiler: LuaTeX and pdfTeX (≥ 1.30).

  • An up-to-date LaTeX installation, at least TeX Live 2012.

  • Additional packages can be necessary, e.g. CTAN:language/armenian/
    armtex.zip is not part of TeX Live 2012.

  • Most of the PDF files are generated using lualatex and package ‘fontspec’
    that uses the Latin Modern fonts as default. They are available as OpenType
    fonts. LuaTeX generates with OpenType fonts considerably smaller PDF files.
    Also PDF object stream compression is used (PDF 1.5). Therefore the further
    post-processing of PDF files are currently dropped.

  • (Outdated since 2011-07-01) PDF post-processing, I have used two steps:

     1. First step:

         1. I have written a tool that analyzes page stream contents and
            optimizes them (removal of unnecessary color settings, minimize
            translation operations, …) → pdfbox-rewrite.jar.

         2. For reading and writing the PDF file I have used PDFBox →
            PDFBox-0.7.2.jar (http://pdfbox.apache.org/).

         3. To get better results I patched some of the classes of PDFBox
            (especially the write module) → pdfbox-rewrite.jar.

     2. The final conversion step was done by Multivalent, because it makes a
        very good job in PDF compression: → Multivalent20060102.jar (http://
        multivalent.sourceforge.net/)

    Multivalent and PDFBox are available, pdfbox-rewrite.jar, however, is just
    a first prototype, not ripe for a release. Therefore this step of
    post-processing is optional for the project latex-tds. The build script
    looks for the library and skips this steps automatically if necessary. If
    you give the build script the option --nopostprocess, then it will skip the
    postprocess steps (building is faster, the pdf files a little larger).
    Install the jar files in the directory lib where they are expected by the
    build script.

  • Unix, Perl background is expected.

  • No support or documentation.


10. History
============

2006/04/27
      □ Start of the project (without babel, amslatex, psnfss).

2006/06/01
      □ Module amslatex added.

2006/06/03
      □ Modules psnfss and babel added, now all modules are covered.

2006/06/07
      □ The project uploaded to CTAN.

2006/07/31
      □ Index added to base/classes.dtx.

      □ ZIP files renamed: *-tds.zip → *.zip

      □ Comment added to ZIP files.

      □ Update of readme.txt.

2006/08/26
      □ Module tds for CTAN:tds/ added.

      □ Obsolete hyphenation patterns added to babel’s source directory to
        avoid violation of LPPL.

      □ Script adjust_checksum added and scripts are put below TDS:scripts.

      □ TDS:makeindex/base/ renamed to TDS:makeindex/latex/

      □ Exception for sample2e.tex and small2e.tex that now go into TDS:tex/
        latex/base/.

2006/08/28
      □ Default texsys.cfg is generated.

      □ adjust_checksum.pl and ziptimetree.pl now moved from the scripts branch
        to TDS:source/latex/latex-tds/lib/.

2006/12/27
      □ Fix of ltxguide.cfg that had loaded doc.sty that disturbs the verbatim
        stuff in fntguide.tex.

2007/01/08
      □ Fix for documentation of longtable.

2007/03/19
      □ Patch for babel/latin.dtx added (babel/3922).

2007/09/04
      □ A minor update on CTAN regarding babel: iahyphen.tex, icehyph.tex, and
        lahyph.tex are now symbolic links to their location in CTAN:language/
        hyphenation/. Therefore also lahyph.tex is now installed in TDS:tex/
        generic/hyphen/.

2007/10/18
      □ Update of module amslatex because of updated package amsrefs.

      □ Fix in latin.dtx.diff.

2007/10/24
      □ Update of babel.

      □ Update of amsrefs (TDS:tex/latex/amscls → TDS:tex/latex/amsrefs).

2008/04/01
      □ Update of babel (2008/03/17).

2008/04/02
      □ Fix: latex/base/*.err added to TDS:source/latex/base/.

2008/04/05
      □ Using .tds.zip instead of .zip to follow CTAN:install's naming
        conventions.

2008/06/28
      □ Update of babel (2008/06/01).

      □ Babel documentation: table of contents reformatted.

2008/07/07
      □ Update of babel (2008/07/06).

2008/07/10
      □ Module knuth added.

      □ Update of babel (2008/07/07).

2008/07/11
      □ Fixes and additions for module knuth.

2008/07/25
      □ Module amslatex: instr-l.tex vanished from CTAN (but not at AMS side).

      □ Some unwanted spaces in generated PDF files fixed. (Caused by a wrong
        package file that was found on my system first.)

2008/08/10
      □ Module latex3 added.

      □ Module base: CTAN hyperlinks fixed.

      □ Module amslatex: Outdated URL fixed in amsldoc.tex.

      □ Module babel: Problem with already defined \meta in tb1604.tex fixed.

2008/09/06
      □ Module base:

          ☆ Using uptodate versions from LaTeX project page for errata lists.

          ☆ lgc2.err added (LaTeX Graphics Companion, 2. ed.).

          ☆ Various fixes in errata lists.

      □ Module tools: array.dtx: documentation fixed (tools/4044).

2008/09/10
      □ Module base: Missing title date for utf8ienc.pdf fixed.

2009/09/05
      □ Module amslatex: updated.

      □ Module latex3: xpackages updated.

      □ Module latex3: expl3 removed, because nothing to do.

2009/09/25
      □ Module amslatex: updated.

      □ Module babel: updated.

      □ Update of LaTeX, release 2009/09/24.

2009/12/07
      □ Module amslatex: Unhappily the .zip files are quite a mess, because
        they contain a mixup of old and new versions. Tried to sort this out
        and fix the last update.

      □ Module latex3: xpackages removed, because nothing to do.

      □ Module latex3 removed, nothing left to do.

2010/05/04
      □ Module base: page layout for source2e fixed (changes, index).

      □ Module base: update of .err files.

2010/10/27
      □ Module amslatex: amscls and amsrefs updated.

      □ Module etex added (only for etex_man).

      □ Erratas updated.

2011/03/10
      □ Module base: patch for latex/4148 (Missing \label and \ref in
        lppl.tex).

2011/04/18
      □ Module amslatex: There is an outdated version of amsthm.sty in
        CTAN:install/macros/latex/required/amslatex/amscls.tds.zip. The package
        amsthm.sty is now generated from the source.

      □ Using TDS tree for missing packages that are not part of TeX Live.
        Module base: CTAN:language/armenian/armtex.zip.

2011/06/24
      □ Module amslatex: Two downloads from AMS server removed, because the
        files are not longer available (and they are on CTAN).

      □ Module amslatex: 00readme.txt and amsrefs.dtx taken from CTAN:macros/
        latex/contrib/amsrefs.zip instead of CTAN:install/macros/latex/contrib/
        amsrefs.tds.zip because the later archive file is out of sync.

2011/06/30
      □ Module base:

          ☆ Update of LaTeX, release 2011/06/27.

          ☆ Patch ltpatch.ltx to match the kernel version.

          ☆ Patch lppl.tex.diff removed (no longer needed).

          ☆ Patch ltfssdcl.dtx.diff added (checksum fixed).

      □ Module tools: Release 2011/06.

      □ Module babel: Release 2011/06.

2011/07/01
      □ PDF generation:

          ☆ Use of LuaTeX instead of pdfTeX for most of the files.

          ☆ Use of package ‘fontspec’ with Latin Modern fonts as default in
            OpenType format (smaller PDF file sizes). The post-processing of
            PDF files is skipped.

          ☆ Various patches and fixes for LuaLaTeX and package ‘fontspec’.

      □ Module base:

          ☆ Update of LaTeX.

          ☆ Patches ltpatch.ltx.diff and ltfssdcl.dtx.diff removed (no longer
            needed).

      □ Module tools: Update.

2011/07/03
      □ build.pl:

          ☆ Caching for PDF generation added.

          ☆ ‘FINAL’ markers in the output of build.pl for final (Lua|pdf)TeX
            runs.

2011/07/26
      □ PDF generation: Use of package unicode-math with Latin Modern Math
        where possible.

2011/08/10
      □ Update of tools.

2011/10/05
      □ Update of tools (varioref).

2011/11/16
      □ Update of babel.

2012/05/12
      □ Update of amslatex (amsrefs).

      □ Update of readme.txt that is renamed to README (CTAN convention).

      □ Update of tlc2.err.

2013/02/14
      □ Update of amslatex (amsrefs).

      □ Module amslatex: cite-x*.tex, jb.bib in TDS:source/, because these
        files are now classified as test files.

      □ Module base: lb2.err and tlc2.err updated.

      □ Change in version control system from CVS to git with public source
        repository.

2013/02/15
      □ Module amsfonts added.

2013/02/25
      □ Patch file lb2.err.diff removed by call of sed inside build.pl.

      □ README rewritten in text document format AsciiDoc and added as HTML and
        PDF files.

      □ README.asciidoc updated.

      □ Makefile: Target ‘check-links’ added.

2013/02/26
      □ README generated from README.asciidoc via README.html.

2013/02/27
      □ README.asciidoc: Additions and updates.

      □ README.pdf generated by wkhtmltopdf via README.html.

2013/03/07
      □ Update of amslatex (amsrefs 2013/03/06 v2.13).

2013/03/10
      □ Update of amslatex (amsrefs 2013/03/07 v2.14).

2013/03/30
      □ Update of babel (3.9) including reorganization of language files.

2014/02/03
      □ Removal of module babel. It has a new maintainer and the languages are
        now maintained separately.

      □ Update of knuth (2014/01/19).

      □ Update of base (errata lists: lb2.err, tlc2.err).

2014/05/03
      □ Update of LaTeX, release 2014/05/01 using public subversion repository
        of LaTeX2e. Modules: base, cyrillic, graphics, tools.

      □ Line ends are normalized in source text files of the LaTeX modules.
        Trailing spaces are removed and the line ends are Unix line ends.

      □ Update of armtex (needed to generate module base).

      □ New options --vcs and --vcs-update for using the files of the public
        source repository of the LaTeX project.

2014/05/05
      □ Using LaTeX modules from CTAN.

2014/05/08
      □ Update of base and graphics.

      □ README.html with Unix line ends.

      □ ZIP file for CTAN upload with top level directory latex-tds.

2014/05/10
      □ Module cyrillic: Missing 00readme.txt added.

2014/05/15
      □ Module base: fix-cm updated (2014/05/13 v1.1q).

      □ Module tools: tabularx updated (2014/05/13 v2.10).

      □ Module tools: readme.txt renamed to 00readme.txt+.

      □ Module knuth: .web files are put below TDS:web/knuth//.

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Last updated 2014-05-15 12:50:26 CEST