-
RDF - the Resource Description Framework - is a standard a
way for simple descriptions to be made
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RDF Schema - a means for declaring and relating semantics
used in description
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OWL - a means for way to develop richer subject - or domain
- specific vocabularies and stipulating constraints
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RDF, RDF Schema and OWL build on XML for providing a
serialization syntax and URIs for unique identification
As of Feb 2004, RDF, RDF Schema and OWL are W3C
Recommendations
(Press
release and
testimonials)