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Zerorule is a lite ruleengine/expert system that implements the RETE algorithm which can improve the speed of forward-chained rule system. It is written entirly in the powerful python language. it supplies both a script interpreter and simple CLI.
AutoSummary uses Natural Language Processing to generate a contextually-relevant synopsis of plain text. It uses statistical and rule-based methods for part-of-speech tagging, word sense disambiguation, sentence deconstruction and semantic analysis.
Program E is an AIML chatterbot written in PHP and using MySQL. It's composed by a converter which loads the AIML files into the database, a core ruleengine that adheres to the AIML 1.0.x specification and several chat interfaces: HTML, Flash and XML-R
Algernon is a rule-based reasoning engine written in Java. It allows forward and backward chaining across Protege knowledge bases. In addition to traversing the KB, rules can call Java functions and LISP functions (from an embedded LISP interpreter)
JEOPS is a Java based forward chaining RULEENGINE.
This RuleEngine is used to power up the business process by rules in Java Application Servers, client applications, and Servlets.
Contextual rule-based text normalization engine written in java, that can be used to implement stemming algorithms or phonetic normalizers. The project includes a french stemmer/phonetic normalizer, and a soundex implementation. Includes a Lucene Analyzer
Top Engine the Semantic Web Engine for the Enterprise. Top Engine is a Business RuleEngine that utilize OWL DL ontologies for vocabulary primitive to write rules on top of ontology. Top Engine support forward and backward chaining with truth maintenance
Clone of the creator of expert systems CLIPS, with an inference engine that works in both chaining, with a strategy of depth or breadth for the conflict resolution. Rule-based paradigm only with operators AND, NOT, OR.