How to program new PHP Xindice functions

[Eric MERY]

Hello,
I'm using the Xindice PHP class of Jill Rhoads.
But some functions are note programmed like indexer functions...
How can I program them? Which document can help me? Which document tells
me the name of the xml methods with the parameters?
Thanks.
Eric.
http://eric.mery.free.fr/xindice_1_1_PHP.htm