Simple Ontology for Drupal

Well, I don't know if you know about simpleontology module for Drupal 6.x, this module work with concepts, relations, tag and properties, this work with inferences.
The owner of this project is a chinesse student who published his document in chinesse language.
Well this project not is my owner.
This module is available at: http://code.google.com/p/simpleontology/
Pre requisites

• graphviz

There is an error in utils.php file under src directory at line 362, here there is a line with (%s) parameter, this should be ('%s').
This module build a XML file, I show it in this discussion.
I hope that someone can improve this module and integrate with rdf module or other modules for semantic web.

Sorry for my english.

Greetings.