[O] [odt][ANN] Embed links to mathml files as ODF formula

[Jambunathan K]

I am pleased to announce (preliminary) support for embedding mathml
files as ODF formulae in odt documents.

Specfically if one provides a link to mathml files as shown below

[[./equation.mathml]]

then the contents of the mathml file is embedded in the exported ODT
document as a ODF formula.

I intend to support link to *.odf files as well. (But this is not
available yet).

Moot point: I am still uncertain how the mathml equations specified in
Org format. For example, does the current approach of using file links
of the form *.mathml (or *.odf) extension sound OK? Should I use a new
mathml:// link type?

Please see the attached Org file for a quick demonstration of what the
current set of changes mean.

1. Update work area
2. Copy mathml.org, formula1.mathml, formula2.mathml to the same
   directory
3. Use C-c C-e O to export.

Currently the equations are embedded as unnumbered, display/paragraph
types.  

IMPORTANT: I am following this mail with a patch to org.el which will
add support for LaTeX-to-MathML conversion using an external
converter.

#+TITLE:     mathml.org
#+AUTHOR:    Jambunathan K
#+EMAIL:     address@hidden
#+DESCRIPTION:
#+KEYWORDS:
#+LANGUAGE:  en
#+OPTIONS:   H:3 num:t toc:t \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
#+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc

#+EXPORT_SELECT_TAGS: export
#+EXPORT_EXCLUDE_TAGS: noexport
#+LINK_UP:   
#+LINK_HOME: 
#+XSLT:

* Unnumbered Display Equation (Non-captioned)
  [[./formula1.mathml]]


* Un-numbered Display Equation (Captioned)
#+CAPTION: Kinetic Energy
#+LABEL:Equation:1
  [[file:formula2.mathml]]


* COMMENT LaTeX Fragment

#+CAPTION: Kinetic Energy 
#+LABEL:Equation:1

  \begin{equation*}
  e = \frac{1}{2}mv^2
  \end{equation*}
  

<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML";>
 <semantics>
  <mrow>
   <mi>x</mi>
   <mi mathvariant="normal">=</mi>
   <msqrt>
    <mi>b</mi>
   </msqrt>
  </mrow>
  <annotation encoding="StarMath 5.0">x = sqrt b</annotation>
 </semantics>
</math>

<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML";>
 <semantics>
  <mrow>
   <mrow>
    <mi>e</mi>
    <mi mathvariant="normal">=</mi>
    <mfrac>
     <mn>1</mn>
     <mn>2</mn>
    </mfrac>
   </mrow>
   <msup>
    <mi mathvariant="italic">mv</mi>
    <mn>2</mn>
   </msup>
  </mrow>
  <annotation encoding="StarMath 5.0">e=1 over 2 mv^2
</annotation>
 </semantics>
</math>

mathml.odt
Description: mathml.odt

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