Non-Binary Relations

• 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>