Bernd Walter, Stefan Benzschawel. Complex Structures in (Deductive) Database Systems: Variables and Open Property Sets. In Kai von Luck, Heinz Marburger, editors, Management and Processing of Complex Data Structures, Third Workshop on Information Systems and Artificial Intelligence, Hamburg, Germany, February 28 - March 2, 1994, Proceedings. Volume 777 of Lecture Notes in Computer Science, pages 1-21, Springer, 1994.
Abstract is missing.