An Expert System Written in prolog with a knowledge builder, Forward/Backward chaining, and inference engine. Modelled, Architected and designed by Vance King Saxbe. A. with the geeks from GoldSax Consulting, GoldSax Money, GoldSax Treasury, GoldSax Finance, GoldSax Banking and GoldSax Technologies email @vsaxbe@yahoo.com. Development teams from Power Dominion Enterprise, Precieux Consulting. Project sponsored by GoldSax Foundation, GoldSax Group and executed by GoldSax Manager. A Complex Event Processing Engine applicable for any functional domain. Used in conjunction with GoldPatterns for pattern detection and the Decision Engine makes it a true expert engine. Ideal for Policy decision making for Corporates, Governments and the like. The GoldDSL-(domainname) package in conjuction with the expert system helps the domain expert raise queries, write rules and constraints in the natural language.