RDF. RDF (W3C, 2005) and RDF schema (RDFS) became a W3C recommendation
in 1999. It is a general framework to describe the contents of Internet
resources. RDFs can be used directly to describe an ontology by making
objects, classes, and properties available to programmers.
???. DAML+OIL. The DARPA agent markup language + ontology inference layer
(DAML+OIL) (DAML, 2005) is an extension of XML and RDF. DAML+OIL
aims at complete support for defining ontologies. It provides rich constructors
for forming complex class expressions and axioms for enabling reasoning and
inference on ontology data.
Develop ng Dynam c Packag ng Appl cat ons
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission
of Idea Group Inc. is prohibited.
???. OWL. OWL (W3C, 2004) is a semantic markup language for publishing and
sharing ontologies on the Web. It is the newest Semantic Web standard and
became a W3C recommendation in February 2004.
From the different Semantic Web languages available (e.g., RDF, RDFS, DAML+OIL,
and OWL) we have selected OWL to develop our e-tourism ontologies.
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