Expert System development with open source

Some open source expert systems / expert systems tools (tools you can use to write Expert Systems) include

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• C Language Integrated Production System (CLIPS), CLIPS is an enviroment used to make rule or o bject based expert systems
• Python Knowledge Engine Pyke, Pyke allows you to use Logic Programming to make expert systems in Python
• OpenExpert PHP Expert System Tool mainly focused on application for Legal Expert Systems.
• d3web is Java Knowledge Base System that uses XML
• jColibri Reference Platform for Case Base Reasoning Programs in Java
• DTRules Decision Table based rules engine in Java
• drools is a well supported Java based rule-processing engine
• EulerEuler is an inference engine supporting logic based proofs.
• Infosapient Java Business Rules Engine
• Jena Jena is a Java framework which includes a rule-based inference engine, a ontology API f and a query engine
• JEOps JEOPS adds forward chaining, first-order production rules to Java in order facilitate expert systems development using declarative programming
• JLisa A CLips like rule engine with a Common Lisp interface in Java
• mandarax A derivation rule compiler for Java
• ofBiz Java based Business Rules Engine
• OpenCycOpenCyc is the open source version of the Cyc technology, the world's largest and most complete general knowledge base and commonsense reasoning engine.
• DEX DEX is an interactive computer program for the development of qualitative multi-attribute decision models and the evaluation of options

[출처] https://stackoverflow.com/questions/9642004/are-there-open-source-expert-systems-with-reasoning-capabilities