isomath update (1oct08)

git-svn-id: svn://tug.org/texlive/trunk@10818 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 184 insertions, 182 deletions

diff --git a/Master/texmf-dist/tex/latex/isomath/isomath.sty b/Master/texmf-dist/tex/latex/isomath/isomath.sty
index d2496183dda..7dc97ec2e45 100644
--- a/Master/texmf-dist/tex/latex/isomath/isomath.sty
+++ b/Master/texmf-dist/tex/latex/isomath/isomath.sty
@@ -1,14 +1,15 @@
-% isomath.sty: Math for scientists
+% isomath: Math for scientists
 % ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 % 
-% :Copyright: © 2008 Günter Milde,
-%             Released under the terms of the GNU General Public License 
-%             (v. 2 or later)
+% :Copyright: © 2008 Günter Milde
+% :Licence:   Released under the terms of the GNU General Public License 
+%             (version 2 or later).
 % 
-% :Abstract: The isomath package enables formatting Greek and Latin letters
-%            as symbols for vectors, matrices, and tensors in the typefaces
-%            recommended for scientific papers by the International
-%            Standard ISO 31.
+% :Abstract:  The isomath package enables formatting Greek and Latin 
+%             letters as symbols for vectors, matrices, and tensors 
+%             in the typefaces recommended for scientific papers 
+%             by the International Standard ISO 31. For this, a *bold italic*
+%             and a *sans-serif bold italic* math alphabet are defined.
 % 
 % .. contents:: 
 % 
@@ -18,33 +19,46 @@
 % Motivation
 % ==========
 % 
-% Scientific organisations like IUPAP_, IUPAC_, NIST_, BIPM_, and others
-% recommend typesetting math according to International Standard ISO 31
-% `Quantities and units`_ (ISO 31-0:1992 to ISO 31-14:1992).\ [#]_
+% .. Did you ever manage to write the stress tensor ``$\sigma$`` in a
+%    *sans-serif bold italic* typeface, as recommended by [typefaces]_?
 % 
-% .. [#] A summary of these rules is free available [typefaces]_. See also
-%        [symbol-fonts]_ and [SI-brochure]_.
+% Scientific organisations like IUPAP_, IUPAC_, NIST_, BIPM_, and others
+% recommend typesetting math according to International Standard `ISO 31`_
+% `Quantities and units` (ISO 31-0:1992 to ISO 31-14:1992).\ [#]_
 % 
 % The traditional `LaTeX-style` deviates in some points from this rules:
 % 
 % * The ``\vec`` command produces an array accent, while ISO 31 recommends
-%   a `bold italic` typeface for vector symbols.
+%   a *bold italic* typeface for vector symbols.
 % 
 % * Greek letters are excluded from font changes with the math alphabets,
 %   while the ISO 31 rules apply equally to letters from both the Greek
 %   and the Latin alphabet.
 % 
-% * There is no provision for typesetting of Greek letters in `bold italic`
+% * There is no provision for typesetting of Greek letters in *bold italic*
 %   style recommended for vectors (even though the required fonts are
 %   available).
 % 
-% * There is no provision for typesetting letters in `sans-serif bold italic`
+% * There is no provision for typesetting letters in *sans-serif bold italic*
 %   recommended for typesetting tensor symbols.
 % 
+% Also, the Unicode Standard defines the block `mathematical alphanumeric
+% symbols`_ — *To be used for mathematical variables where style variations
+% are important semantically* — which contains Latin and Greek letters in
+% bold, italic, bold italic, sans-serif bold, and sans-serif bold italic
+% typeface.\ [#]_
+% 
 % Some of these points are already adressed by `related packages`_, however
 % there is currently no package (known to the author) that defines the
 % *sans-serif bold italic* math alphabet needed for tensor symbols.
 % 
+% .. [#] A summary of these rules is free available [typefaces]_. See also
+%        [fonts-for-symbols]_ and [SI-brochure]_.
+% 
+% .. [#] Plus Number variants and Latin letters in script, bold script,
+%    fraktur, bold fraktur, double-struck, sans-serif and monospace;
+%    alltogether 1023 codepoints.
+% 
 % 
 % Features
 % ========
@@ -64,65 +78,55 @@
 %   + Upright Greek letters are available through the ``\mathrm`` and
 %     ``\mathbf`` alphabets, if the corresponding fonts are OML encoded.
 % 
+%   Caution: small Greek letters in a math alphabet command can lead to garbage. 
+%     Use the options for `OML math alphabets`_ (if the used font supports the
+%     `OML font encoding`_) or place Greek letters outside the math alphabet
+%     command. Some packages (including fixmath_) provide ``\up*`` or
+%     ``\var*`` macros for upright Greek letters, e.g. ``\mathrm{k}\upOmega``.
+% 
 % * The `command aliases`_ ``\vectorsym``, ``\matrixsym``, and ``\tensorsym``
-%   select an ISO-conforming typeface.
+%   allow semantic markup selecting an ISO-conforming typeface.
 %     
-% * For this, `new math alphabets`_ are defined:
-% 
-%   :``\mathbold``: for *boldface italic*  (vector and matrix
-%     symbols),
-% 
-%   :``\mathsans``: for *sans-serif italic* ,
+% * For this, new `math alphabets`_ are defined:
 % 
-%   :``\mathboldsans``: for *sans-serif bold italic*  (tensor symbols).
+%   :``\mathbold``: *boldface italic* (vector and matrix symbols),
+%   :``\mathsans``: *sans-serif italic* (optional),
+%   :``\mathboldsans``: *sans-serif bold italic*  (tensor symbols).
 % 
 %   The family for these fonts is by default taken from the document's
 %   ``\rmdefault`` and ``\sfdefault`` values.  The ``rmdefault=<family>`` and
 %   ``sfdefault=<family>`` options_ can be used to override the defaults.
 % 
-% * `Font mappings`_ are defined for families which have an OML encoded
-%   counterpart but miss the substitution definition.
-% 
-% .. Now, it should be possible to typeset, e.g., the symbol for the tensor of
-%    dielectric permittivity ε according to the rules (i.e. sans-serif bold
-%    italic).
-% 
-% .. caution::  Using small Greek letters in a math alphabet command (e.g. 
-%    ``\mathrm{\pi}``) can lead to garbage. 
-%   
-%    You can use the `OML math*`_ options (if the used font supports the
-%    `OML font encoding`_) or place the Greek letter outside the math
-%    alphabet command. Some packages (including fixmath_) provide ``\up*``
-%    or ``\var*`` macros for upright Greek letters, e.g. 
-%    ``\mathrm{k}\upOmega``. 
+% * Missing `font mappings`_ are defined for font families which have an OML
+%   encoded counterpart but miss the substitution definition in their ``*.fd``
+%   files.
 % 
 %    
 % Examples   
 % ========
 % 
-% * ``\usepackage{isomath}``
 % 
-%   In many cases (when ``\sfdefault`` expands to "cmss"), the
+% * In many cases (e.g. when ``\sfdefault`` expands to "cmss"), the
 %   ``\mathboldsans`` alphabet is neither bold nor sans, as "cmss" has no OML
 %   encoded variants and maps to "cmmi".
 % 
-% * Use cmbright_ for the sans-serif math alphabets::
+%   Use cmbright_ for sans-serif math alphabets::
 
-\usepackage[sfdefault=cmbr]{isomath}
- 
+%   \usepackage[sfdefault=cmbr]{isomath}
+%    
 % * Redefine the standard ``\vec`` macro to typeset its argument in `bold
 %   italic`::
 
 %   \usepackage[sfdefault=cmbr]{isomath}
 %   \renewcommand{\vec}{\vectorsym}
 % 
-% * The mathdesign_ package comes with an OML encoded bold roman font but does
-%   not use it for ``\mathbf`` in the default setting. With ::
+% * The mathdesign_ package provides an OML encoded *bold roman* font but does
+%   not set it up for ``\mathbf``::
 
 %   \usepackage[charter]{mathdesign}
 %   \usepackage[OMLmathbf,sfdefault=cmbr]{isomath}
 %   
-%   ``\mathbf{\pi}`` works as expected.
+%   Now, ``\mathbf{\pi}`` works as expected.
 % 
 % Related packages
 % ================
@@ -159,13 +163,6 @@
 % OML font encoding
 % =================
 % 
-% If a math alphabet shall support both, Greek and Latin letters, it must use
-% the OML font encoding — no other established encoding provides Latin and
-% Greek letters in one font:
-% 
-% * LGR is Greek-only,
-% * T7 is just a "reserved name" for a standard Greek encoding.
-% 
 % The `LaTeX font encodings` guide [encguide]_ defines:
 % 
 %    The OML encoding contains italic Latin and Greek letters for use in
@@ -187,13 +184,21 @@
 % * A more suitable public name would be `TeX math letters` or `Original/Old
 %   Math Letters`. The latter would also explain the acronym OML.
 % 
+% The OML font encoding is the only established encoding providing
+% Latin and Greek letters in one font:
+% 
+% * LGR is Greek-only,
+% * T7 is just a "reserved name" for a standard Greek encoding.
+% 
 % Unfortunately, support for the OML encoding is missing for many font
 % families even if the base font contains all Greek letters.
 % Supported font families can be found searching for ``oml*.fd`` files and by
 % grepping for "DeclareFont.*OML", "SymbolFont.*OML" and "MathAlphabet.*OML"
 % in ``*.sty`` files.
 % 
-% .. table:: Table 1: Fonts supporting the OML font encoding
+% .. _table 1:
+% 
+% .. table:: Fonts supporting the OML font encoding
 %    :class: booktab
 % 
 %    ============= =========================== ======= ======== ====== =======
@@ -249,7 +254,7 @@
 % 
 % .. _table 2:
 % 
-% .. table:: Table 2: Non-CM fonts with ``cmm`` as OML substitution
+% .. table:: Non-CM fonts with ``cmm`` as OML substitution
 %    :class: booktab
 % 
 %    ============= ===============================
@@ -323,14 +328,6 @@
 
 \RequirePackage{fixmath}
 
-% ifthen
-% ------
-% 
-% The standard LaTeX package `ifthen`_ provides the commands ``\ifthenelse``,
-% and ``\whiledo``. ::
-
-\RequirePackage{ifthen}
-
 % kvoptions
 % ---------
 % 
@@ -345,7 +342,7 @@
 % rmdefault
 % ---------
 % 
-% Alternative math font family name for roman. The default is to use the
+% Alternative family for roman math fonts. The default is to use the
 % corresponding text font family (``\rmdefault``) in OMS encoding.
 % `Table 2`_ lists some fonts where a different setting is advised.
 % ::
@@ -355,21 +352,20 @@
 % sfdefault
 % ---------
 % 
-% Alternative math font family name for sans-serif. The default is to use the
+% Alternative family for sans-serif math fonts. The default is to use the
 % corresponding text font family (``\sfdefault``) in OMS encoding.
 %  
-% Computer Modern Sans Serif (cmss) has no italic and bold variants in OMS
-% encoding. Nor have many derivatives (lmss, aess, ...).
-% Actually, there are only a few OML-encoded sans-serif fonts (all
-% slanted/italic):
+% Computer Modern Sans Serif (cmss) has no OMS encoded variant. Nor have many
+% derivatives (lmss, aess, ...). Actually, there are only a few OML-encoded
+% sans-serif fonts (all slanted/italic):
 % 
-% :zavm:  arev_ (Vera Sans with math extension)
+% :zavm:  arev_ (Vera Sans with math extension, large x-hight)
 % :cmbr:  cmbright_ (Computer Modern Bright, slightly lighter than cmss)
-% :iwona: iwona_ (Humanistic Sans Serif)
+% :iwona: iwona_ (Humanistic Sans Serif, some shapes very similar to roman)
 % :hvm:   hvmath_ (Helvetica Math, commercial, free bitmap version)
-% :llcmm: lxfonts_ (LX Fonts, very wide and quite eccentric, new in 2008)
+% :llcmm: lxfonts_ (LX Fonts, very wide, excentric, large x-hight, new in 2008)
 % 
-% For many fonts (especially CM and related), ``[sfdefault=cmbr]`` is the
+% For most fonts (especially CM and related), ``[sfdefault=cmbr]`` is the
 % recommended setting.
 % 
 % ::
@@ -377,37 +373,43 @@
 \DeclareStringOption[\sfdefault]{sfdefault}
 
 
+% TODO
+%   Allow scaling?
+% 
+%   
 % reuseMathalphabets
 % ------------------
 % 
-% The definition of `new math alphabets`_ can lead to a "too many math
+% The definition of new `math alphabets`_ can lead to a "too many math
 % alphabets used in version normal" error.
 % 
 % As a workaround, this option tells ``isomath`` to re-use the existing
-% ``\mathbf`` and ``\mathsf`` alphabets for italic bold and sans-serif.
+% ``\mathbf`` and ``\mathsf`` alphabets for italic bold and sans-serif bold.
 % 
 % To access the upright shapes, the corresponding ``\textbf`` and ``\textsf``
-% command can be used (remember that this toggles the math-mode off and might
-% use a different font). 
+% commands might be used (however, that this toggles the math-mode off and
+% might use a different font). 
 % 
-% Both standard and `new math alphabets`_ are in upright shape, if this option
-% is combined with the corresponding `OML math*`_ option. 
 % ::
 
 \DeclareBoolOption{reuseMathalphabets}
 
-% OML math*
-% ---------
+% Caution: Do not use ``reuseMathalphabets`` together with ``OMLmathbf`` or
+% ``OMLmathsf``.  
 % 
-% These options cause isomath to `redefine standard alphabets`_ in OML
+%   
+% OML math alphabets
+% ------------------
+% 
+% The following options cause isomath to (re)define `math alphabets`_ in OML
 % encoding.
 % 
 % With Greek letters defined as ``\mathalpha``, the math alphabets are
-% expected to be in `OML font encoding`_. OT1 encoded fonts have ligatures and
-% non-alpha symbols in place of the small Greek letters.
+% expected to be in `OML font encoding`_ as OT1 encoded fonts have ligatures
+% and non-alpha symbols in place of the small Greek letters.
 % 
 % Setting these options enables access to small Greek letters in different
-% shapes with e.g. ``\mathrm{\pi}``. 
+% shapes with e.g. ``\mathrm{\pi}`` **if an OML encoded font is available**. 
 % Currently, support for the `OML font encoding`_ is rather limited:
 % 
 % * only the mathdesign_ fonts support *bold roman* in OML encoding, while
@@ -421,10 +423,10 @@
 \DeclareBoolOption{OMLmathrm}
 \DeclareBoolOption{OMLmathbf}
 \DeclareBoolOption{OMLmathsf}
+\DeclareBoolOption{OMLmathsans}
 \DeclareBoolOption{OMLmathtt}
 
-
-% ============
+% ---------------------------------------------------
 % 
 % Process the options with ``kvoptions`` extensions::
 
@@ -433,69 +435,86 @@
 % Declarations
 % ============
 % 
-% New math alphabets
-% ------------------
+% Math alphabets
+% --------------
+% 
+% In math, LaTeX uses "absolute" fontnames instead of a selection by family,
+% shape, and weight (see the [fntguide]_ for the rationale). 
+% 
+% We define a math alphabet for every required font variant and optionally
+% re-define the standard math alphabets in `OML font encoding`_.
+% Unfortunately, the number of math alphabets in one math version is limited
+% to 16, so we have to be carefull not to exceed this.
 % 
-% The `italic bold` math alphabet is named ``\mathbold`` in `related
-% packages`_. For letters, this is the same as the bold version of
-% ``\mathnormal``. With the reuseMathalphabets_ option, ``\mathfb`` is
-% redefined and ``\mathbold`` made an alias (overwriting existing
-% definitions). ::
+% mathbold
+% """"""""
+% 
+% For the *`italic bold* math alphabet we use the name ``\mathbold``
+% established in `related packages`_. With the reuseMathalphabets_ option,
+% ``\mathfb`` is redefined and ``\mathbold`` made an alias (overwriting
+% existing definitions). ::
 
-\ifthenelse{\boolean{isomath@reuseMathalphabets}}
-{
+\ifisomath@reuseMathalphabets
   \DeclareMathAlphabet{\mathbf}{OML}{\isomath@rmdefault}{bx}{it}
   \def\mathbold{\mathbf}
-}
-{
+\else
   \DeclareMathAlphabet{\mathbold}{OML}{\isomath@rmdefault}{bx}{it}
-}
-
-% For `italic sans-serif`, we either redefine ``\mathsf`` (with
-% reuseMathalphabets_) or, in analogy to ``\mathbold``, we define the new
-% alphabet ``\mathsans``::
-
-\ifthenelse{\boolean{isomath@reuseMathalphabets}}
-{
-  \DeclareMathAlphabet{\mathsf}{OML}{\isomath@sfdefault}{m}{it}
-  \def\mathsans{\mathsf}
-}
-{
-  \DeclareMathAlphabet{\mathsans}{OML}{\isomath@sfdefault}{m}{it}
-}
+\fi
 
-% A `sans serif slanted bold` alphabet is needed for the tensor
-% symbols. As there is no standard math alphabet to re-use, we define the new
-% alphabet ``\mathboldsans``::
+% mathsans
+% """"""""
+% 
+% For *italic sans-serif*, we define a new alphabet named ``\mathsans`` (in
+% analogy to ``\mathbold``). As this typeface is not required by ISO 31, it is
+% only defined if the ``OMLmathsans`` option is set::
+
+\ifisomath@OMLmathsans
+  \DeclareMathAlphabet{\mathsans}{OML}{\isomath@sfdefault}{m}{it}
+\fi
 
-\DeclareMathAlphabet{\mathboldsans}{OML}{\isomath@sfdefault}{bx}{it}
+% mathboldsans  
+% """"""""""""
+% 
+% A *sans serif slanted bold* alphabet is needed for tensor symbols.  With the
+% reuseMathalphabets_ option, ``\mathsf`` is redefined and ``\mathboldsans``
+% made an alias::
 
+\ifisomath@reuseMathalphabets
+  \DeclareMathAlphabet{\mathsf}{OML}{\isomath@sfdefault}{bx}{it}
+  \def\mathboldsans{\mathsf}
+\else
+  \DeclareMathAlphabet{\mathboldsans}{OML}{\isomath@sfdefault}{bx}{it}
+\fi  
 
 % Redefine standard alphabets
-% ---------------------------
+% """""""""""""""""""""""""""
 % 
 % Redefine standard alphabets in `OML font encoding`_
-% (if the corresponding `OML math*`_ option is true). ::
-
-\ifthenelse{\boolean{isomath@OMLmathrm}}
-{\SetMathAlphabet{\mathrm}{normal}{OML}{\isomath@rmdefault}{n}{n}}{}
-\ifthenelse{\boolean{isomath@OMLmathbf}}
-{\SetMathAlphabet{\mathbf}{normal}{OML}{\isomath@rmdefault}{b}{n}}{}
-\ifthenelse{\boolean{isomath@OMLmathbf}}
-{\SetMathAlphabet{\mathsf}{normal}{OML}{\isomath@sfdefault}{n}{n}}{}
-\ifthenelse{\boolean{isomath@OMLmathtt}}
-{\SetMathAlphabet{\mathtt}{normal}{OML}{\ttdefault}{n}{n}}{}
+% (if the corresponding `OML math alphabets`_ option is true). ::
+
+\ifisomath@OMLmathrm
+  \SetMathAlphabet{\mathrm}{normal}{OML}{\isomath@rmdefault}{n}{n}
+\fi
+\ifisomath@OMLmathbf
+  \SetMathAlphabet{\mathbf}{normal}{OML}{\isomath@rmdefault}{b}{n}
+\fi
+\ifisomath@OMLmathsf
+  \SetMathAlphabet{\mathsf}{normal}{OML}{\isomath@sfdefault}{n}{n}
+\fi
+\ifisomath@OMLmathtt
+  \SetMathAlphabet{\mathtt}{normal}{OML}{\ttdefault}{n}{n}
+\fi
 
 % Command aliases
 % ---------------
 % 
-% Define commands to typeset some symbol categories complying to
-% the ISO standard.
+% The following macros allow semantic markup of mathematical symbols.
+% The symbols argument is typeset as proposed by ISO 31 and [typefaces]_.
 % 
-% Vector symbols
-% """"""""""""""
+% \\vectorsym
+% """""""""""
 % 
-% Symbols for vectors are *boldface italic*::
+% Symbols for vectors are typeset *boldface italic*::
 
 \newcommand{\vectorsym}{\mathbold}
 
@@ -503,20 +522,17 @@
 % you might want to re-define the standard ``\vec`` command after loading this
 % package (cf. the Examples_ section).
 % 
-% Matrix symbols
-% """"""""""""""
+% \\matrixsym
+% """""""""""
 % 
-% Symbols for matrices are *boldface italic*, i. e. typeset in the same face as
-% vectors (see [typefaces]_). [#]_ ::
+% Symbols for matrices are typeset *boldface italic*, i. e. in the same face
+% as vectors. ::
 
 \newcommand{\matrixsym}{\mathbold}
 
-% .. [#] However, matrix symbols are usually capital letters whereas vectors
-%        are small ones. Exceptions are physical Quantities like the force
-%        vector F or the electrical field E.
-% 
-% Tensor symbols
-% """"""""""""""
+
+% \\tensorsym
+% """""""""""
 % 
 % Symbols for tensors are *sans-serif bold italic*::
 
@@ -530,7 +546,7 @@
 % 
 % We define the substitutions needed for the math alphabet definitions in this
 % package. Ideally, these should become part of a more complete set of
-% definitions in the package's fd file(s):
+% definitions in the package's ``*.fd`` files:
 % 
 % Mathpazo (Palatino) ppl -> zplm ::
 
@@ -545,58 +561,48 @@
 \DeclareFontShape{OML}{fav}{bx}{it}{<->ssub * zavm/b/it}{}
 
 % LX Fonts (lxfonts): llcmss -> llcmm ::
+  
+% repeat font declarations from lxfonts.sty
+\DeclareFontFamily{OML}{llcmm}{\skewchar\font'177}
+\DeclareFontShape{OML}{llcmm}{m}{it}{<-> lcmmi8}{}
+\DeclareFontShape{OML}{llcmm}{bx}{it}{<-> lcmmib8}{}
 
 \DeclareFontFamily{OML}{llcmss}{}
 \DeclareFontShape{OML}{llcmss}{m}{it}{<-> ssub * llcmm/m/it}{}
 \DeclareFontShape{OML}{llcmss}{bx}{it}{<-> ssub * llcmm/bx/it}{}
 
-% The end
-% =======
-% ::
+
+% No declarations below this point::
 
 \endinput
 
-% TODO
-% ====
-% 
-% The ``\mathsans`` definition "increases symmetry". However, it adds a math
-% alphabet that is rarely (or not at all) used. Giving the limit of 16 math
-% alphabets, it might be better not to define it. Make it an option?
-% 
-% About this file
-% ===============
-% 
-% The package documentation is included in the source file. 
-% 
-% The bidirectional text <-> code converter PyLit_ can be used to transform
-% the LaTeX package ``isomath.sty`` to a `reStructured Text`_ document
-% ``isomath.sty.txt`` (and back again). To translate ``isomath.sty.txt`` to
-% LaTeX or HTML, the Python docutils_ are required.
-% 
-% 
+
 % References
-% ==========
-% 
-% .. [encguide] `LaTeX font encodings`:
-%    http://dante.ctan.org/CTAN/macros/latex/doc/encguide.pdf
-% 
-% .. [symbol-fonts] `On the use of italic and roman fonts for symbols in
-%    scientific text`, I.M. Mills and W.V. Metanomski (Revised December 1999):
-%    http://old.iupac.org/standing/idcns/fonts_for_symbols.html
-% 
-% .. [Green-Book] `Quantities, Units and Symbols in Physical Chemistry`,
-%    3rd edition, RSC Publishing, Cambridge 2007:
-%    [ISBN 0 85404 433 7; ISBN-13 978 0 85404 433 7]
+% **********
 % 
 % .. [typefaces] `Typefaces for Symbols in Scientific Manuscripts`:
 %    http://physics.nist.gov/Document/typefaces.pdf
 % 
+% .. [fonts-for-symbols] `On the use of italic and roman fonts for symbols in
+%    scientific text`, (Revised December 1999):
+%    http://old.iupac.org/standing/idcns/fonts_for_symbols.html
+% 
 % .. [SI-brochure] `The International System of Units (SI)`:
 %    http://www.bipm.org/en/si/si_brochure/
 % 
+% .. [encguide] `LaTeX font encodings`:
+%    http://dante.ctan.org/CTAN/macros/latex/doc/encguide.pdf
+% 
+% .. [fntguide] `LaTeX 2e font selection`:
+%    http://dante.ctan.org/CTAN/macros/latex/doc/fntguide.pdf
+% 
 % .. see also
 %    [koma-mail] Custom font substitution: http://www.komascript.de/node/823
 % 
+%    [Green-Book] `Quantities, Units and Symbols in Physical Chemistry`,
+%    3rd edition, RSC Publishing, Cambridge 2007:
+%    [ISBN 0 85404 433 7; ISBN-13 978 0 85404 433 7]
+% 
 % .. Links
 % .. *****
 % 
@@ -604,7 +610,7 @@
 % .. _IUPAC: http://iupac.org/
 % .. _IUPAP: http://www.iupap.org/
 % .. _NIST:  http://physics.nist.gov/
-% .. _Quantities and units:
+% .. _ISO 31:
 %     http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_tc_browse.htm?commid=46202
 % .. _mathematical alphanumeric symbols:
 %     http://www.unicode.org/charts/PDF/U1D400.pdf
@@ -628,7 +634,3 @@
 % .. _pxfonts: http://dante.ctan.org/CTAN/help/Catalogue/entries/pxfonts.html
 % .. _tmmath: http://dante.ctan.org/CTAN/help/Catalogue/entries/tmmath.html
 % .. _txfonts: http://dante.ctan.org/CTAN/help/Catalogue/entries/txfonts.html
-% 
-% .. _pylit: http://pylit.berlios.de
-% .. _reStructured Text: http://docutils.sourceforge.net/rst.html
-% .. _docutils: http://docutils.sourceforge.net/rst.html