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)].