1. Berners-Lee, T., Hendler, J., Lassila, O.: The Semantic Web. Scientific American 279(5), 34–43 (2001)
2. Brickley, D., Guha, R.: Resource Description Framework (RDF) Schema Specification, World Wide Web Consortium (2000), http://www.w3.org/TR/2000/CR-rdf-schema-20000327
3. Carr, L., Bechhofer, S., Goble, C., et al.: Conceptual Linking: Ontology-based Open Hypermedia. In: Proc. of the 10th Intl. WWW Conference, Hong-Kong (2001)
4. Ciravegna, F.: Adaptive Information Extraction from Text by Rule Induction and Generalisation. In: Proc. of the 17th Intl. Joint Conference on AI, Washington, USA (2001)
5. DAML.org.: Reference description of the DAML+OIL ontology mark-up language (2001), http://www.DAML.org/2001/03/reference.html