There was within the last 50 years a lot of database applications in which time plays an
important role. These applications revealed a lack in time support within the current DBMSs as
the application should give the data the temporal semantics rela
ted to it, also to check the
temporal constraints. Therefore, researches were made in order to embed this temporal
semantics and constraints in the DBMS itself, also to provide a new query language that can be
tagged as “temporal”.
