Gadia, Shashi K. (1997) Applicability of Temporal Data Models to Query Multilevel Security Databases: A Case Study. Technical Report TR97-17, Department of Computer Science, Iowa State University.
Applicability of temporal data models to query multilevel security databases: a case study
Shashi K. Gadia
Computer Science Department
Iowa State University
Ames, IA 50011
Abstract. In a multilevel security database there are multiple beliefs about a given real world object. The ability of a database model to accommodate multiple beliefs is termed polyinstantiation in the multilevel security literature. In this paper we remark that in an abstract sense polyinstantiation is a priori present in all models for temporal and spatial databases. In particular we investigate the applicability of the parametric model for temporal data to query multilevel security data and, as a case study, compare it to a model for multilevel security given by Winslett, Smith, and Qian.
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