1. ADL Technical Team: Sharable Content Object Reference Model (SCORM) (2004)
2. An, Y., Borgida, A., Mylopoulos, J.: Constructing Complex Semantic Mappings Between XML Data and Ontologies. In: International Semantic Web Conference, pp. 6–20 (2005)
3. Bray, T., Paoli, J., Sperberg-McQueen, C.M., Maler, E., Yergeau, F., Cowan, J. (eds.): Extensible Markup Language (XML) 1.1. W3C Recommendation (2006), http://www.w3.org/TR/xml11/
4. Brickley, D., Guha, R.V. (eds.): RDF Vocabulary Description Language 1.0: RDF Schema. W3C Recommendation (2004), http://www.w3.org/TR/rdf-schema
5. Chang, S.F., Sikora, T., Puri, A.: Overview of the MPEG-7 standard. IEEE Transactions on Circuits and Systems for Video Technology 11, 688–695 (2001)