PGML, the Proof General Markup Language

PGML is a simple markup language which was designed for Proof General to contain elements for describing mathematical symbols (glyphs) as they appear in the conrete syntax output of proof assistants. The symbol names were chosen to match the X-Symbol names which are used by ProofGeneralEmacs. These in turn are named after TeX and LaTeX macros for generating symbols.

TODO:

• describe PGML markup
• add list of symbol names
• tools for converting
• relationship to MathML