Database abstractions: aggregation and generalization
ACM Transactions on Database Systems (TODS)
Interactive Editing Systems: Part I
ACM Computing Surveys (CSUR)
Document Formatting Systems: Survey, Concepts, and Issues
ACM Computing Surveys (CSUR)
The design requirements of office systems
ACM Transactions on Information Systems (TOIS)
ACM Transactions on Information Systems (TOIS)
A data modeling approach for office information systems
ACM Transactions on Information Systems (TOIS)
Information Processing for CAD/VLSI on a Generalized Data Management System
VLDB '84 Proceedings of the 10th International Conference on Very Large Data Bases
A Multimedia Office Filing System
VLDB '83 Proceedings of the 9th International Conference on Very Large Data Bases
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The problem of the retrieval by content of office documents is addressed here. However, the retrieval by content is greatly enhanced if the semantic role of document objects can he described. For this reason we introduce a conceptual level of modeling resulting in the definition of conceptual structures of documents. Type definition is essential for the retrieval, but since office document structures tend to greatly differ from instance to instance, we introduce the concept of weak type, allowing the definition of types at different levels of detail (type hierarchies). In this paper a modeling approach based on these ideas is presented. Particular emphasis is put on the type definition and the use of types in query formulation and processing.