Graphical View Language. A visual language for specifying interactive graphical output by T.C.N. Graham & J.R. Cordy, Queen' s University, Canada. ["GVL: A Graphical, Functional Language for the Specification of Output in Programming Languages", J.R. Cordy & T.C.N. Graham, Proc Ieee Intl Conf on Comp Lang ICCL' 90 (March 1990)].