Babel, a multilingual package for use with LATEX's ... - linsrv.net

\SetCase
{\uccode‘i="9D\relax
\uccode"19=‘I\relax}
{\lccode"9D=‘i\relax
\lccode‘I="19\relax}
\EndBabelCommands
(Note the mapping for OT1 is not complete.)
\SetHyphenMap
{〈to-lower-macros〉}
New 3.9g Case mapping serves in T E X for two unrelated purposes: case
transforms (upper/lower) and hyphenation. \SetCase handles the former, while
hyphenation is handled by \SetHyphenMap and controlled with the package option
hyphenmap. So, even if internally they are based on the same T E X primitive
(\lccode), babel sets them separately.
There are three helper macros to be used inside \SetHyphenMap:
• \BabelLower{〈uccode〉}{〈lccode〉} is similar to \lccode but it’s ignored if
the char has been set and saves the original lccode to restore it when
switching the language (except with hyphenmap=first).
• \BabelLowerMM{〈uccode-from〉}{〈uccode-to〉}{〈step〉}{〈lccode-from〉} loops
though the given uppercase codes, using the step, and assigns them the
lccode, which is also increased (MM stands for many-to-many).
• \BabelLowerMO{〈uccode-from〉}{〈uccode-to〉}{〈step〉}{〈lccode〉} loops
though the given uppercase codes, using the step, and assigns them the
lccode, which is fixed (MO stands for many-to-one).
An example is (which is redundant, because these assignments are done by both
luatex and xetex):
\SetHyphenMap{\BabelLowerMM{"100}{"11F}{2}{"101}}
This macro is not intended to fix wrong mappings done by Unicode (which are the
default in both xetex and luatex) – if an assignment is wrong, fix it directly.
4 Compatibility and changes
4.1 Compatibility with german.sty
The file german.sty has been one of the sources of inspiration for the babel
system. Because of this I wanted to include german.sty in the babel system. To be
able to do that I had to allow for one incompatibility: in the definition of the macro
\selectlanguage in german.sty the argument is used as the 〈number〉 for an
\ifcase. So in this case a call to \selectlanguage might look like
\selectlanguage{\german}.
In the definition of the macro \selectlanguage in babel.def the argument is used
as a part of other macronames, so a call to \selectlanguage now looks like
\selectlanguage{german}. Notice the absence of the escape character. As of
version 3.1a of babel both syntaxes are allowed.
All other features of the original german.sty have been copied into a new file,
called germanb.sty 20 .
20 The ‘b’ is added to the name to distinguish the file from Partls’ file.
27