user- Scientific American 284(5):34-43 (2001)
- International Semantic Web Conference, volume 3298 of Lecture Notes in Computer Science, page 6-16. Springer, (2004)
- Information and Software Technology 37(7):383-393 (1995)
- Proceedings of the 10th 10th International Workshop on Cooperative Information Agents,CIA2006, 4149, page 1--7. Springer-Verlag, (2006)
- The Knowledge Engineering Review 17(1):93--96 (2002)
- (2004)
- Proc. of 5th International Semantic Web Conference, Athens, GA, USA, November 5-9, 2006, LNCS 4273, (2006)
- Formal Ontology in Conceptual Analysis and Knowledge Representation, Deventer, The Netherlands, Kluwer Academic Publishers, (1993)
- Proceedings of the European Conference on Artificial Intelligence ECAI, (2006)
- W3C, (2004)
- http://www.dajobe.org/2004/01/turtle/, (2003)
- Institute for Learning and Research Technology, Bristol, (2004)
- W3C, (1998)
- W3C Recommendation, (2004)
- WC3 Recommendation, (2004)
- W3C Recommendation, (2004)
- WWW '06: Proceedings of the 15th international Conference on World Wide Web, page 585--594. New York, NY, USA, ACM Press, (2006)
- IEEE Intelligent Systems 2(16):60--71 (2001)
- Journal of Web Semantics 4(2):144--153 (June 2005)
- http://www.\-altova.\-com/, (2007)accessed 2007-02-27 .
