myPGP stores its documentation in DocBook-XML format. This allows us to maintain an updated version of it on-line (in XHTML). You can visit it here.

For a DocBook tutorial, consider Writing documentation using DocBook - A crash course.

The DocBook file lives in the directory doc of the source code (doc/mypgp.docbook). To get the latest version of the code, check out the module mypgp from the CVS (read instructions here).