Jess programming language
Jess, a
rule engine for the Java platform, is a superset of
CLIPS programming language, developed by
Ernest Friedman-Hill of
Sandia National Labs. It was first written in late
1995.
It provides
rule-based programming suitable for automating an
expert system, and is often referred to as an
expert system shell. In recent years,
intelligent agent systems have also developed, which depend on a similar capability.
Rather than a procedural paradigm, where a single program has a loop that is activated only one time, the declarative paradigm used by Jess continuously applied a collection of rules to a collection of facts by a process called
pattern matching. Rules can modify the collection of facts, or they can execute any Java code.
Jess can be used to build
Java applets as well as full applications that use knowledge in the form of declarative rules to draw conclusions, and inferences. Since many rules may match many inputs, there are few effective general purpose matching algorithms. The Jess rules engine uses the
Rete algorithm.
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