Selected Papers from the Symposium on Conceptual Modeling, Current Issues and Future Directions
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Object identification by abstract identifiers should be considered as a modeling and not as a database concept. This means that object identifiers are not appropriate for the access to specific objects using a database language. In this paper we discuss how the relational concept of a functional dependency can be adapted to object databases in order to get more convenient ways of fetching objects. Object functional dependencies are proposed allowing the determination of value based identification criteria. For these constraints different definitions of satisfiability are given based on a so-called validation relation. These definitions are related to different forms of identification.