An iNTerface between Prologapplication programs and the X Window System that aims to be independeNT from the Prologengine, provided that it has a QuiNTus {foreign function} iNTerface (e.g. {SICStus} and {YAP}). It is mostly written in Prolog and is divided in two libraries: Edipo - the lower level iNTerface to the Xlib functions and Ytoolkit - the higher level user iNTerface toolkit. . E-mail: Ze' Paulo Leal . (1993-03-02)