PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The most common use for them is to get rid of spam (unwanted advertising) by scanning the subjects for common spam headers like XXX for you, and automatically deleting anything that arrives with that header.However, there is much more that you can do with filters, including automatically filing messages away from your InBox (to keep your various mailing lists separate, for example); highlighting
http://www.w3.org/ns/prov#wasQuotedFrom
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