1. ece 720 intelligent web: ontology and beyond
lecture 4a: rdf – addendum

2. RDF URI and URIref
URI identifies a resource in the Web URIref is URI Reference, it is a URI with an optional fragment identifier
ece 720, winter ‘12

3. RDF URI and URIref
fragment identifier is a string that refers to a resource “within” another primary resource identified by URI is attached to URI and preceded by the character #
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4. RDF URIref absolute http://www.w3.org/People/EM/contact#me
relative
#PrivateDoc
equivalent to
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5. RDF rdf:type
is a property that provides an elementary typing system in RDF there is a triple: R rdf:type C
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6. RDF rdf:type
R rdf:type C states that C is an instance of rdfs:Class and R is an instance of C. the rdfs:domain of rdf:type is rdfs:Resource the rdfs:range of rdf:type is rdfs:Class
ece 720, winter ‘12