About: http://webisa.webdatacommons.org/334463722

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	SIP allows functionality such as presence management and instant messaging that H.323, [the International Telecommunication Union standard for Internet voice and video conferencing,] doesn't, he points out.
http://www.w3.org/ns/prov#wasQuotedFrom	wi-fiplanet.com