Cameleon is not maintained any more. It has been splitted in various parts. Have a look at these separated projects:
The documentation generated by OCamldoc can be browsed here.
2007-09-18 - Odot 0.6 (Download): Handle new form of bounding box of graphs.
2005-12-16 - Odot 0.5 (Download): Parse HTML ids, escaped newlines and #-lines; add some useful functions and documentation comments.
2005-12-15 - Odot 0.4 (Download): Add Odot.node_id function; improve usability of Odot_view.box class.
2005-12-12 - Odot 0.3 (Download): Parse case-unsensitive keywords, parse "+" (concatenate double-quoted ids).
2005-12-09 - Odot 0.2 (Download): Initial release.