Roach, John W.Deighan, John2013-06-192013-06-191990http://hdl.handle.net/10919/19609This paper documents how a user may work with the VPI Prolog compiler. The user interface functions called debugging environment and input/output are all described in detail. Anyone using this manual should be able to program effectively using VPI Prolog.application/pdfenIn CopyrightTechnical reportTR-90-30http://eprints.cs.vt.edu/archive/00000212/01/TR-90-30.pdf