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dc.titleQueries in a temporal modelling system
dc.contributor.authorYeo, G.K.
dc.contributor.authorLi, G.
dc.identifier.citationYeo, G.K.,Li, G. (1999). Queries in a temporal modelling system. Asia-Pacific Journal of Operational Research 16 (1) : 99-112. ScholarBank@NUS Repository.
dc.description.abstractA temporal modelling framework (Yeo and Li, 1996) 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 (Geoffrion, 1987, 1989a, 1989b, 1991) 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.
dc.subjectStructured modelling
dc.subjectTemporal structured modelling language
dc.subjectTime modelling
dc.subjectTime-specific query
dc.contributor.departmentINFORMATION SYSTEMS
dc.description.sourcetitleAsia-Pacific Journal of Operational Research
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