PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Many users also want to be able to view opposing pages to a given page at the same time as viewing a given page (as they can with a conventional magazine). [0008] In one aspect, the present invention provides systems and methods for distributing and viewing electronic documents, such as magazines, periodicals, books, etc., which closely simulate the experience of reading the printed counterparts.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com