An extended relational data model for multimedia DBMSs

We have extended the canonical relational data model to enable the manageme nt of multimedia objects. In an attempt to provide a smooth paradigm shift to multimedia information system development, we have enhanced the relation al data model framework with techniques for modeling, storing and manipulat ing multimedia data. In particular, we have provided a graphical conceptual model for structuring a multimedia document and mapping rules for translat ing it into an extended relational data schema. Extensions have regarded th e management of foreign keys, active components, mechanisms for the managem ent of spatial and temporal relations, and finally functions for handling m ultimedia presentations. As a consequence, we have also provided extensions to the SQL language to handle these new mechanisms. (C) 2000 Academic Pres s.