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The Computer Journal 1988 31(2):116-124; doi:10.1093/comjnl/31.2.116
© 1988 by British Computer Society
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An Object-Oriented Data Model for Database Modelling, Implementation and Access

L. Zhao * and S. A. Roberts *

Artificial Intelligence Group, Department of Computer Studies, University of Leeds, Leeds LS2 9JT, UK

An Object-Oriented Data Model (OODM) has been defined for logical database design and database access. The OODM accommodates three types of relationship – aggregation, generalisation and particularisation – and provides four types of data operations for defining schema, creating database, retrieving objects and expanding objects. The expand operations is used in the context of previously retrieved objects or object types and allows automatic navigation through the database. The OODM supports a structured menu-based interface which allows a user to define the schema and retrieve from the database without any knowledge of the OODM. An important feature of this interface is that menu information is modelled as a set of interrelated objects stored in the database. Therefore menus can be created, accessed and updated in the same way as data. Furthermore, a basic set of menus is generated from the database schema and made available to the user for the purpose of answering simple queries. A prototype of the OODM has been implemented and used to model an application domain-Orchids Description and Classification.

Received June 1987. revised September 1987.

* Artificial Intelligence Group, Department of Computer Studies, University of Leeds, Leeds LS2 9JT


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N. Bhalla
Object-oriented data models: a perspective and comparative review
Journal of Information Science, January 1, 1991; 17(3): 145 - 160.
[Abstract] [PDF]


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