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Temporal Object Modeling: Diagramming Conventions and Design Considerations
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Author(s): Richard Vidgen (University of Manchester Institute of Science and Technology, UK)
Copyright: 1997
Volume: 8
Issue: 1
Pages: 11
Source title:
Journal of Database Management (JDM)
Editor(s)-in-Chief: Keng Siau (City University of Hong Kong, Hong Kong SAR)
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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