PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Now Ruby 2.2 and Rails 4.2 released with several improvements in terms of performance, scalability, maintainability more stable and mature like other framework and language, I will suggest you to check date while posted article, I will say Rails is ready for enterprise application (all world moving towards REST architecture and rails is by born has REST support).
http://www.w3.org/ns/prov#wasQuotedFrom
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