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ITRM: A Temporal Data Model Supporting Indeterminacy


Jia-Dong Ren, Hui-Li Peng, Xiao-Jian Zhang


Vol. 6  No. 9  pp. 97-101


The depiction of indeterminate temporal and atemporal data is important to obtain a suitable model of database management systems. This paper presents a formal relation model, called ITRM (Indeterminate Temporal Relation Model), for the representation, manipulation and query of indeterminate information. Moreover, indeterminate time interval is classified and temporal relation algebra operators are extended. All the operations of the algebra are defined and are proved to be closed. The given examples show that the ITRM model can efficiently represent indeterminate data.


Indeterminacy, ITRM, Time interval, Temporal relational algebra operator