Using a rules engine can lower an application's maintenance and extensibility costs by reducing the complexity of components that implement complex business logic. This updated article shows you how to use the open source Drools rules engin...
www.ibm.com/developerworks/java/library/j-drools/
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A rule-based framework for developing rule-based applications with major emphasis on maximum separation of business logic and data, conflict handling, and interoperability of rules.
www.alphaworks.ibm.com/tech/commonrules
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ILOG JRules lets users quickly and securely change business rules. The rule engine features an easy-to-understand business rule language and an open, extensible business rule repository. Applications include Web self-service, online lendin...