GTL

A query language combining the capabilities of temporal and graphical database languages. GTL-queries may be related to single database states (e.g. Is there a database state where condition c1 holds?) or to sequences of database states (e.g. Is there a database state sequence where first c1 holds, then c2, and finally c3?).

A. Oberweis, V. Sänger, "GTL - A Graphical Language For Temporal Data", Proceedings of the 7th International Working Conference on Scientific and Statistical Database Management