1. Berners-Lee (1998) Semantic Web Road map
http://www.w3.org/DesignIssues/Semantic.html
2. Lassila O & Swick R (1999) Resource Description Framework (RDF) Model and Syntax.
http://www.w3.org/RDF/Group/WD-rdf-syntax/
3. Guha L. & Brickley D. (2000). Resource Description Framework (RDF) Schema Specification 1.0 W3C Candidate Recommendation 27 March 2000
http://www.w3.org/TR/rdf-schema
4. RDF Site Summary (RSS) 1.0
http://groups.yahoo.com/group/rss-dev/files/specification.html
5. Brian McBride, Rigo Wenning, Lorrie Cranor, An RDF Schema for P3P W3C Note 25 January 2002.
http://www.w3.org/TR/p3p-rdfschema/