On Matrix Representations of Participation Constraints

Abstract. We discuss the existence of matrix representations for generalised and minimum participation constraints which are frequently used in database design and conceptual modelling. Matrix representations, also known as Armstrong relations, have been studied in literature e.g. for functional dependencies and play an important role in example-based design and for the implication problem of database constraints. The major tool to achieve the results in this paper is a theorem of Hajnal and Szemer´edi on the occurrence of clique graphs in a given graph.

• Type: Conference
• Year: 2009
• Where: ER
• Authors: Sven Hartmann, Uwe Leck, Sebastian Link
• Keywords: Conceptual Modelling, ER 2009, Matrix Representations, Minimum Participation Constraints, Programming Languages