1 files changed, 72 insertions, 24 deletions
diff --git a/Master/texmf-dist/doc/generic/FAQ-en/faq-projects.tex b/Master/texmf-dist/doc/generic/FAQ-en/faq-projects.tex
index d427436dbf7..f4b93ef1e1a 100644
--- a/Master/texmf-dist/doc/generic/FAQ-en/faq-projects.tex
+++ b/Master/texmf-dist/doc/generic/FAQ-en/faq-projects.tex
@@ -362,7 +362,7 @@ distraction.
 
 \Question[Q-omegaleph]{Omega and Aleph}
 
-Omega \nothtml{(\ensuremath{\Omega})} was developed as an extension of
+Omega\nothtml{ (\ensuremath{\Omega})} was developed as an extension of
 \TeX{}, to use with multilingual texts, expressed in a variety of
 input encodings.  Omega uses 16-bit, Unicode-encoded, characters.  It
 provides many innovative concepts, notably including the ``translation
@@ -390,34 +390,82 @@ typesetting.  The new system was to be known as Omega-2
 designed in a modular fashion so that support of new facilities (such
 as use of advanced OpenType fonts) could be added in a relatively
 straightforward fashion.  A quick web search leads to a recommendation
-that potential users consider \Qref{\LuaTeX{}}{Q-luatex} instead.
-Fortunately, lessons learned in Aleph project are being carried
-forward in the \Qref*{\LuaTeX{}}{Q-luatex} project.
+that potential users consider \Qref*{\luatex{}}{Q-luatex} instead;
+fortunately, lessons learned in Aleph project have been carried
+forward in the development of \luatex{}.
 
-\Question[Q-xetex]{The \xetex{} project}
+\Question[Q-xetex]{\xetex{}}
 
 \href{http://scripts.sil.org/xetex}{\xetex{}}, by Jonathan Kew, is a
-successor to the shareware \TeX{}/\acro{GX} program for Macintoshes.
-It is a Unicode-based \TeX{} implementation which is able to make
-direct use of the fonts installed on a system. It supports the
-advanced typographical features available in modern font technology
-(OpenType, \acro{AAT} on Mac~\acro{OS}~X, Graphite).  \xetex{} was
-originally developed for Mac~\acro{OS}~X but it is now fully
-integrated in \texlive{} on a wide range of platforms, as well as
-being available as part of \miktex{}. \xetex{} supports Unicode
-character sets and bidirectional typesetting (via \eTeX{} primitives).
-It is popular among linguists and scholars in the humanities, as well
-as an increasing range of people working in other fields.  Support for
-mathematical Unicode fonts (such as Asana Math and Cambria) is
-progressing.
-
-The project has an active % ! line break
-\href{http://www.tug.org/mailman/listinfo/xetex}{mailing list}; a
-collection of other information is to be found in a set of % ! line break
-\href{http://www.tug.org/xetex/}{links on the \acro{TUG} web site}.
+successor to the shareware TeX/GX program for Macintoshes.  It was
+developed as a \acro{WEB} `change file' applied to the original source
+of \tex{}; the main changes include:
+\begin{description}
+\item[The input stage] \xetex{} by default reads Unicode (UTF-8, for
+  instance), although it's also capable of interpreting differently
+  encoded files (for backwards compatibility).  Multibyte characters
+  are reduced to a single internal character upon reading, so they are
+  considered as a unique entity when tokenization is performed.  (So,
+  for example, you can have command names in cyrillic, if you must,
+  but such a practice is not recommended.)
+\item[The font management] a substantial revision has added support
+  for OpenType and TrueType fonts, delegating some parts to
+  third-party libraries.
+\item[The maths font set up] \xetex{} introduces new primitives for
+  extending the \csx{mathcode} and \csx{mathchardef} commands in TeX,
+  allowing the user to specify characters in the whole Unicode set and
+  in 256 `math families' (\tex{} only has 16, which limits some maths
+  coding techniques).
+\item[``Post-processing'' features (A)] \xetex{} links to the
+  \ProgName{teckit} library so it can apply a \extension{map} file
+  that allows transformation of characters in already formed token
+  lists, before they are processed in the ``stomach'' for typesetting.
+  In this way, a declaration ``\texttt{Ligatures=TeX}'' is provided,
+  which attaches a map directive to the font that transforms the
+  character combinations (familiar to \tex{} users) into a single
+  character; for instance \texttt{-{}-{}-} is transformed into
+  ``\textemdash''.
+\item[``Post-processing'' features (B)] Characters can be assigned to
+  an ``interchar token class'' and it is possible to specify tokens to
+  be added when there is a transition from one class to another.  The
+  packages \Package{polyglossia}, \Package{xeCJK} and
+  \Package{ucharclasses} exploit this feature.
+\end{description}
+Otherwise, the process of typesetting is essentially the same as
+\tex{}'s.  (However some changes have also been made in the
+hyphenation stage that may give slightly different results if the same
+document is compiled with \pdftex{} or \xetex{}.
 \begin{ctanrefs}
-\item[\nothtml{\rmfamily}XeTeX reference]\CTANref{xetexref}
+\item[polyglossia.sty]\CTANref{polyglossia}
+\item[xeCJK.sty]\CTANref{xecjk}
+\item[ucharclasses.sty]\CTANref{ucharclasses}
 \end{ctanrefs}
+\LastEdit{2013-02-21}
+
+% \href{http://scripts.sil.org/xetex}{\xetex{}}, by Jonathan Kew, is a
+% successor to the shareware \TeX{}/\acro{GX} program for Macintoshes.
+% It is a Unicode-based \TeX{} implementation which is able to make
+% direct use of the fonts installed on a system. It supports the
+% advanced typographical features available in modern font technology
+% (OpenType, \acro{AAT} on Mac~\acro{OS}~X, Graphite).  \xetex{} was
+% originally developed for Mac~\acro{OS}~X but it is now fully
+% integrated in \texlive{} on a wide range of platforms, as well as
+% being available as part of \miktex{}. \xetex{} supports Unicode
+% character sets and bidirectional typesetting (via \eTeX{} primitives).
+% It is popular among linguists and scholars in the humanities, as well
+% as an increasing range of people working in other fields.  Support for
+% mathematical Unicode fonts (such as Asana Math and Cambria) is
+% progressing.
+
+% The project has an active % ! line break
+% \href{http://www.tug.org/mailman/listinfo/xetex}{mailing list}; a
+% collection of other information is to be found in a set of % ! line break
+% \href{http://www.tug.org/xetex/}{links on the \acro{TUG} web site}.
+% \begin{ctanrefs}
+% \item[\nothtml{\rmfamily}XeTeX reference]\CTANref{xetexref}
+% \end{ctanrefs}
+
+
 
 \Question[Q-luatex]{\PDFTeX{} and \LuaTeX{}}