1. A computer-implemented method of using Resource Description Framework (RDF) reification to associate Semantic Web statements with start properties and stop properties related to lifetimes of the Semantic Web statements using a reification processor, comprising: accessing an RDF statement from a Semantic Web resource wherein the RDF statement includes a subject, a predicate, and an object; determining a lifetime of the subject of the RDF statement, wherein determining the lifetime of the subject is based on at least one of a start property of the subject and a stop property of the subject; determining a lifetime of the predicate of the RDF statement, wherein determining the lifetime of the predicate is based on at least one of a start property of the predicate and a stop property the predicate; determining a lifetime of the object of the RDF statement, wherein determining the lifetime of the object is based on at least one of a start property of the object and a stop property of the object; automatically determining a lifetime of the RDF statement based on an overlap of the lifetime of the subject, the lifetime of the predicate, and the lifetime of the object; generating a reified RDF statement, using the reification processor, wherein the reified RDF statement includes the subject, the predicate, the object and the lifetime of the RDF statement; and storing the reified RDF statement in the Semantic Web resource.
1. A computer-implemented method of using Resource Description Framework (RDF) reification to associate Semantic Web statements with start properties and stop properties related to lifetimes of the Semantic Web statements using a reification processor, comprising: accessing an RDF statement from a Semantic Web resource wherein the RDF statement includes a subject, a predicate, and an object; determining a lifetime of the subject of the RDF statement, wherein determining the lifetime of the subject is based on at least one of a start property of the subject and a stop property of the subject; determining a lifetime of the predicate of the RDF statement, wherein determining the lifetime of the predicate is based on at least one of a start property of the predicate and a stop property the predicate; determining a lifetime of the object of the RDF statement, wherein determining the lifetime of the object is based on at least one of a start property of the object and a stop property of the object; automatically determining a lifetime of the RDF statement based on an overlap of the lifetime of the subject, the lifetime of the predicate, and the lifetime of the object; generating a reified RDF statement, using the reification processor, wherein the reified RDF statement includes the subject, the predicate, the object and the lifetime of the RDF statement; and storing the reified RDF statement in the Semantic Web resource. 6. The method of claim 1 , wherein determining the lifetime of the RDF statement comprises: comparing the lifetime of the object and the lifetime of the subject; and in response to the comparison, selecting an intersection of the compared lifetimes as the lifetime of the RDF statement.