Weak temporal relations

In modeling temporal databases, one essentially time stamps all the atomic data elements. As long as this time stamping is not altered, the information content, in some sense, remains unchanged. This observation gives rise to an interesting concept of a weak temporal rala-tion and weak equality. We discuss several semantics for algebraic operatora on certain homogeneous temporal relations, and prove their equivalence in the sense of weak equality. It follows that a user may be allowed the freedom of viewing the relations in any one of the three ways, and the machine can possibly store them differently.