Temporal Object Modeling: Diagramming Conventions and Design Considerations

Temporal Object Modeling: Diagramming Conventions and Design Considerations

Richard Vidgen (University of Manchester Institute of Science and Technology, UK)
Copyright: © 1997 |Pages: 11
DOI: 10.4018/jdm.1997010102
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Abstract

Many applications that use a database management system are required to hold temporal data, although few commercially available DBMSs provide temporal facilities. Furthermore, requirements specification techniques, such as structured methods and Object-Oriented Analysis, typically do not support a temporal modelling notation. This paper describes components of temporal modelling, such as granularity, events, and transaction time and introduces a temporal diagramming notation that is suitable for Object-Oriented analysis. Examples are furnished of class diagrams for timestamped attributes and associations. A logical relational design for a class diagram is given that could be used as the basis for physical design of a relational database. The future direction is represented by temporal modelling of object reclassifications, which will require access to business model meta-data.

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