GLog

A database query language that visualizes the database as a single directed graph.

J. Paredaens, P. Peelman and L. Tanca, "G-Log: A Declarative Graphical Query Language ", Proceedings of the Second International Conference On Deductive and Object-Oriented Databases (DOOD), Munich. Springer-Verlag LNCS 566, 1991, pp. 108-128