Assertor

<foaf:Person rdf:about="#bob">
  <foaf:name>Bob B. Bobbington</foaf:name>
  <foaf:mbox rdf:resource="mailto:bob@example.org"/>
  <foaf:mbox_sha1sum>1a9daad476f0158b81bc66b7b27b438b4b4c19c0</foaf:mbox_sha1sum>
</foaf:Person>

<earl:Software rdf:about="#tool">
  <dc:title xml:lang="en">Cool Tool</dc:title>
  <dc:description xml:lang="en">My favorite tool!</dc:description>
  <foaf:homepage rdf:resource="http://example.org/tools/#cool"/>
  <dct:hasVersion>1.0.3</dct:hasVersion>
</earl:Software>