Raymond K. Wong, H. Lewis Chau, Frederick H. Lochovsky. A Data Model and Semantics of Objects with Dynamic Roles. In W. A. Gray, Per-Åke Larson, editors, Proceedings of the Thirteenth International Conference on Data Engineering, April 7-11, 1997 Birmingham U.K. pages 402-411, IEEE Computer Society, 1997. [doi]
Abstract is missing.