Аннотация
The new Semantic Web recommendations for RDF, RDFS and
OWL have, at their heart, the RDF graph. Jena2, a
second-generation RDF toolkit, is similarly centered on
the RDF graph. RDFS and OWL reasoning are seen as
graph-to-graph transforms, producing graphs of virtual
triples. Rich APIs are provided. The Model API includes
support for other aspects of the RDF recommendations,
such as containers and reification. The Ontology API
includes support for RDFS and OWL, including advanced
OWL Full support. Jena includes the de facto reference
RDF/XML parser, and provides RDF/XML output using the
full range of the rich RDF/XML grammar. N3 I/O is
supported. RDF graphs can be stored in-memory or in
databases. Jena's query language, RDQL, and the Web API
are both offered for the next round of
standardization.
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