| http://www.w3.org/ns/prov#value | - If it is determined that the message is an error message, such as would be the case when the process operates incorrectly, the protocol proxy sends the error message to the conference server where the message type and the message destination are determined and the error message is sent to the near user/chat client (see FIG. 5, 320) to inform him or her that the message was not delivered.
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