itex2MML.md

+# itex2MML extension
+
+## References
+
+* [MathJax TeX and LaTeX Support](http://docs.mathjax.org/en/latest/tex.html) ;
+  [TeX Input Jax](https://github.com/mathjax/MathJax/blob/master/unpacked/jax/input/TeX/jax.js) ;
+  [TeX Extensions](https://github.com/mathjax/MathJax/tree/master/unpacked/extensions/TeX)
+
+* [itex Commands](http://golem.ph.utexas.edu/~distler/blog/itex2MMLcommands.html) ; [Source](http://golem.ph.utexas.edu/~distler/code/itexToMML/changes)
+
+## General syntax
+
+* In itex, inline equations are demarcated by $ $. Display equations are demarcated by $$ $$ or \[ \].
+
+  Should the itex2MML define these default delimiters?
+
+* In itex, $pin$ is a single token, which is translated into
+  <mi>pin</mi> in
+  MathML. $p i n$, on the other hand, is three tokens, which is translated into
+  <mi>p</mi><mi>i</mi><mi>n</mi> in MathML.
+  TeX makes no distinction between these two.
+  
+  The itex2MML extension must override MathJax.InputJax.TeX to treat multiple
+  letters as a single variable.
+
+* It is possible (though probably not recommended) to insert MathML markup
+  inside itex equations. So "<" and ">" are significant. To obtain a less-than
+  or greater-than sign, you should use \lt or \gt, respectively.
+
+  MathJax supports \lt or \gt. It does not seem worth allowing MathML in TeX.
+
+## The svg Environment
+  
+  \begin{svg} ... \end{svg} allows you to embed snippets of SVG in itex
+  equations. To assist in Instiki's LaTeX export feature, you can also include
+  a graphicx command: \begin{svg}  ... \end{svg}
+  \includegraphics[width=...]{foo} where foo.pdf is a file containing a PDF
+  version of the graphic. In itex, the \includegraphics command is defined as a
+  NOOP, and the SVG is embedded in the MathML output. In Instiki's LaTeX
+  export, the opposite is true: the svg environment is a NOOP, and the
+  \includegraphics command is included in the output.
+
+  The itex2MML extension can define \includegraphics as a NOOP. Including
+  SVG inside the TeX source might be a more difficult, cf for example the
+  issue with \verb. For example, with itex2MML
+  \begin{svg} &lt;svg&gt;&lt;text&gt;\end{svg}&lt;/text&gt; \end{svg} is an
+  error and \begin{svg} &lt;svg&gt;&lt;text&gt;\end{svg&lt;/text&gt; \end{svg}
+  generates invalid markup.
+
+## WebTeX-style Arrays and Array Options
+
+   The itex2MML extension should implement the following array options: 
+
+<pre>
+\array
+     \arrayopts
+              \collayout (=\colalign), 
+              \rowalign, 
+              \align, 
+              \eqcols, 
+              \eqrows, 
+              \collines, 
+              \rowlines,
+              \frame,
+              \padding
+      \rowopts
+             \colalign, 
+             \rowalign
+      \cellopts
+             \colalign, 
+             \rowalign,
+             \rowspan,
+              \colspan
+</pre>
+
+## Greek Letters
+
+  Missing commands:
+  \Alpha, \Beta, \Zeta, \Eta, \Iota, \Kappa, \Mu, \Nu, \Pho, \Tau, \Upsi
+
+## Log-like Symbols
+
+  All commands are supported.
+
+## Arrows
+
+  Missing commands: \embedsin, \to, \nearr, \nwarr, \searr, \swarr,
+  \neArrow \nwArrow \seArrow \swArrow, \darr, \uparr, \downuparrow
+  \leftsquigarrow, \curvearrowbotright, \righttoleftarrow,
+  \lefttorightarrow  
+
+## Extensible Arrows
+
+  \xrightarrow and \xmapsto are supported by the extpfeil extension. The
+  itex2MML extension can implement other commands similarly.
+
+## Delimiters
+
+   Missing commands: \lang and \rang
+
+## Operators
+
+   Missing commands:
+
+   \bottom \minusb \plusb \timesb \intersection \union \VDash \nequiv \notni \invamp \Del \odash \Perp \sslash \nsubset \nsupset \qed \coloneqq \Coloneqq \coloneq \Coloneq \eqqcolon \Eqqcolon \eqcolon \Eqcolon \colonapprox \Colonapprox \colonsim \Colonsim \dblcolon
+   
+   In keeping with  AMSLaTeX, rather than MathML's conventions, \smallsetminus
+    is designated as a small (non-stretchy) reverse solidus,  \backslash is a
+    reverse solidus.  \setminus is stretchy.
+
+   The itex2MML extension should modify the MathJax's default behavior.
+
+## Symbols
+
+   Missing command: \infinity
+
+## Dots
+
+   Missing command: \udots
+
+## Large Math Operators and Integrals
+
+   Missing commands: \Union, \Intersection, \Oplus, \Otimes, \bigsqcap,
+   \biginterleave, \Wedge, \Vee, \coproduct
+
+## Sizes and Styles
+
+   Missing commands: \textsize, \scriptscriptsize, \mathfr
+
+## Spaces
+
+   Missing commands: \medspace, \thickspace, \negspace, \mathrlap, \mathllap, \mathclap
+
+## Accents
+
+   Missing commands: \closure, \widebar, \widevec, \widecheck, \slash
+
+## Fractions, Sub/Superscripts and Roots
+
+   Missing commands: \underoverset, \tensor, \multiscripts, \mathraisebox
+
+## Numbers
+
+   itex2MML does its best to intelligently parse what's a number and what's not. Unfortunately, conventions for things like decimal markers are very culture-dependent, and incompatibly-so. If you don't like the way itex2MML parses the would-be numbers in your input, you can force it to interpret a certain string as a number, using the \itexnum{} command.
+
+   The extension should modify the number parsing and add the \itexnum command.
+
+## Colors
+
+   \color is already supported (perhaps with the color extension for the named
+   colors). 
+
+   Missing command: \bgcolor
+
+## Interactivity
+
+   Missing commands: \statusline, \tooltip.
+
+   \toggle is implemented differently (as a 2-parameters command).
+