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The Generic Frame Protocol (GFP) accesses knowledge bases stored in frame knowledge representation systems (FRSs). GFP consists of a set of Common Lisp functions that provide a generic interface to these underlying FRSs. This interface isolates an application from many of the idiosyncrasies of speci c FRS software and enables the development of generic tools (eg, graphical browsers, frame editors) that operate on many FRSs. To date, GFP has been used as an interface to LOOM, Ontolingua, THEO, and SIPE {2.