| http://www.w3.org/ns/prov#value | - Please see more details at User Subscriptions and User Presence in our documentation.In the application below, we???ve built both a sending and receiving of IMs. The sending occurs if a user is recognized as being friend, and online; if the user is not a friend, an invitation to chat is sent instead, and if the user is a friend, but offline, then nothing happens.
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