1. Parsons, J., Wand, Y.: Emancipating Instances from the Tyranny of Classes in Information Modelling. ACM Transactions on Database Systems (2000)
2. Staudt Lerner, B., Habermann, A.N.: Beyond Schema Evolution to Database Reorganization. In: Proceedings of OOPSLA/ECOOP (1990)
3. Noy, N.F., Klein, M.: Ontology evolution: Not the Same as Schema Evolution. Knowledge and Information Systems 5 (2003)
4. Corallo, A., Damiani, E., Elia, G.: A Knowledge Management System Enabling Regional Innovation. In: Proceedings of the International Conference on Knowledge-Based Intelligent Information Engineering Systems & Allied Technologies (KES 2002). IOS Press, Amsterdam (2002)
5. Guha, R.V.: The rdfDB Query Language (2000),
http://guha.com/rdfdb/query.html