PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Instant messaging systems are based on an architecture that usually includes at least one instant messaging server (???IM server???), multiple clients, and software that allows the multiple clients to communicate with each other and with the IM server. [0003] IM server clients can exchange text messages, audio, data and other types of multimedia files.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com