<http://webisa.webdatacommons.org/prov/130053008>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/398853872> .
<http://webisa.webdatacommons.org/398853872>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/398853872>	<http://www.w3.org/ns/prov#value>	"A method of determining the status of a certificate at a particular point in time comprising the steps of:creating one or more tables; obtaining information regarding at least one certificate, said information including information regarding the operational period of said at least one certificate; creating a validity history for a certificate beginning with its creation; storing said validity hist" .
<http://webisa.webdatacommons.org/398853872>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .