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W e examine the querying requirements of large libraries of multimedia presentations. Given these requirements, w e examine work o n querying temporal and sequence data, and identzfy the similarities and dissimilarities between presentations and these other f o r m s of data. From this analysis, we propose a n integrated composition and query capability t o permit the reuse of multimedia objects, presentations and presentation segments. T h e query facility permits content and attribute based queries along with queries over temporal synchronization characteristics. T h e m a i n contributions of ourwork are: it addresses both determinant and indeterm i n a n t intervals; it permits querying over presentation libraries with heterogeneous structure; it builds o n work f r o m temporal and sequence database to address the unique semantics of presentations.

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