1. Berners-Lee, T., Hendler, J., Lassila, O.: The Semantic Web. Scientific American 284(5), 34–43 (2001)
2. http://www.w3.org/TR/rdf-schema/
3. http://www.w3.org/TR/daml+oil-reference/
4. Veltman, K.H.: Towards a Semantic Web for Culture. Journal of Digital Information 4(4), Article No. 255 (March 15, 2004)
5. Klopprogge, M.R., Lockeman, P.C.: TERM: An Approach to Include the Time Dimension in the Entity-Relationship Model. In: Proc. Of Secong Int’l Conf. Entity Relationship Approach, pp. 477–512 (October 1981)