RDF action items

What does a statement like the one below represent?

<rdf:Description rdf:about="https://www.daml.org/actionitems/12.rdf">
 <a:state>closed</a:state>
   <a:Action>
      <a:status>available at
http://www.ai.sri.com/daml/ontologies</a:status>
      <a:date>2000-10-31</a:date>
      <a:by>daml@ai.sri.com</a:by>
   </a:Action>
</rdf:Description>

Thanks
Charlie