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Object Composition and Reuse in a Distributed Multimedia Database This paper proposes a distributed multimedia database. We use object-oriented methodology with the support of multimedia networking technologies in the design and implementation of our system. The database supports an easy to reuse mechanism. Objects in the two layered database hierarchy can be grouped and declared as a class, which serve as a reusable multimedia presentation subject. In the hierarchy, we use four type of links to group presentation windows and resources, which are the two kind of basic objects in the database. A locking mechanism can be applied to both layers of persistent objects. The centralized control of the database allows a number of local databases hold the image of transactions of the global database. The implementation of the database is to support and intelligent multimedia presentation system that we have developed earlier.