- RDF data model only supports binary relations (relation between two resources)
- Solution: Use an intermediate resource with additional properties
Statement: The cost of the book 0201000237 is $45.00
<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:s="http://www.schemas.org/Units/">
<rdf:Description about="urn:ISBN:0-201-00023-7">
<s:price rdf:parseType="Resource">
<rdf:value>45.00</rdf:value>
<s:units rdf:resource="http://www.schemas.org/Units/USdollar"/>
</s:price>
</rdf:Description>
</rdf:RDF>