Queries in a temporal modelling system

Queries in a temporal modelling system

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Article ID: iaor20003846
Country: Singapore
Volume: 16
Issue: 1
Start Page Number: 99
End Page Number: 112
Publication Date: May 1999
Journal: Asia-Pacific Journal of Operational Research
Authors: ,
Keywords: computers: data-structure, systems
Abstract:

A temporal modelling framework was proposed to allow dynamic modelling along the time dimension. Specifically, a new time genus with many variations has been added to the Structured Modelling framework. The variations take care of special properties of time in modelling such as orderedness and useful modelling concepts such as circular time and scoping among others. This paper further explores some possible time-specific queries based on the proposed temporal modelling framework. Because the knowledge has been embedded in a structured model, a simplified SQL-like manipulation language can be used to formulate the queries. Queries for retrieval, genus evaluation, and sensitivity analysis are discussed. It is believed that the exploration here would be helpful in designing a unified query language in modelling.

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