X Window Interface for Prolog. A package for Prologsfollowing the Quintus foreign function interface(e.g. SICStus Prolog). XWIP provides a (low-level)Xlib-style interface to X. The current version wasdeveloped and tested on SICStus 0.7 and MIT X11 R5 underSunOS 4.1.1. It should be adaptable to many other Unixconfigurations. Version 0.6.