PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Several features engage the user and promote sharing, including a discussion board, a notes feature to save content and share it with others, and a function which allows the user to print a page or a chapter as a PDF. Unlike a printed textbook, the site has been developed with the expectation that it will provide a foundation of methods, but also evolve as new issues emerge.
http://www.w3.org/ns/prov#wasQuotedFrom
  • medicalxpress.com