4Buitelaar P, Olejnik D, Sintek M. OntoLT: A protege plug-in for ontology extractionfrom text [G]// ISWC. Proceedings of the International Semantic Web Conference, 2003.
5Celjuska D, Vargas-Vera M. Ontosophie: A semiautomatic system for ontology population from text [ G]//ICON. International Conference on Natural Language Processing, 2004.
6Soderland S. Learning to extract text-based information from the World Wide Web[ G]//Third international conference on Knowledge Discovery and Data Mining, 1997.
7Zeldman J. Designing with web standards[M]. New Riders Publishing, Thousand Oaks, CA, 2003.
