PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Consider refactoring your schema, if possible, since -- arguably -- you have an architectural problem... every table should contain only one kind of thing (he is generally obvious) and there should only be one table for any given kind of thing (he is not always as obvious)... and the thing here is a file, with attributes that tell you what kind of file it is.
http://www.w3.org/ns/prov#wasQuotedFrom
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