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Reference.org
Rule Interchange Format
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<p>The Rule Interchange Format (RIF) is a <a href="/facts/W3C_Recommendation/lGWmhF6M">W3C Recommendation</a>. RIF is part of the infrastructure for the <a href="/facts/Semantic_web/NFHo9dB7">semantic web</a>, along with (principally) <a href="/facts/SPARQL/XPP7pFDJ">SPARQL</a>, <a href="/facts/Resource_Description_Framework/WMufyukm">RDF</a> and <a href="/facts/Web_Ontology_Language/jkr0IGn8">OWL</a>. Although originally envisioned by many as a "rules layer" for the semantic web, in reality the design of RIF is based on the observation that there are many "rules languages" in existence, and what is needed is to exchange rules between them. </p><p>RIF includes three dialects, a Core dialect which is extended into a Basic Logic Dialect (BLD) and Production Rule Dialect (PRD). </p>