Temporal Comparison Operators

Another possible generalization of the traditional comparison operators (=, <>, <, <=, etc.) to temporal types consists in determining whether the comparison is true or false at each instant. In this case, the result is a temporal Boolean. The temporal comparison operators are denoted by prefixing the traditional comparison operators with #. Some examples are #= or #<=. Temporal equality and non-equality are available for all temporal types, while temporal inequalities are only available for temporal types whose base type has a total order defined, that is, tint, tfloat, or ttext.