Semantic Web - slide "Statement IDs"

we can use a statement as the subject of another statement
- this is useful for recording source, timetamp, uncertainty, etc.

we give a statement an ID by specifying rdf:ID with the predicate, e.g. <Person rdf:ID="jhd"> <born rdf:ID="stmt1">1923-10-23</born> <died rdf:ID="stmt2">1999-03-17</died> </Person> <rdf:Description rdf:about="#stmt1"> <source rdf:resource="http://..."/> </rdf:Description> <rdf:Description rdf:about="#stmt2"> <source rdf:resource="http://www.detnews.com/obituaries/..."/> </rdf:Description>

statement IDs are part of an RDF feature called reification