<detailskey="documentation"value="The sender of the message. Possibly a userid that may be resolved to an IUser or another identifier (e.g. a station or system name)."/>
<detailskey="documentation"value="wether the sender of this message will accept or handle answer (e.g. a message sent by the system to an IUser will not necessarily be handled)"/>
<detailskey="documentation"value="wether the sender of this message will accept or handle an answer, i.e. unidirectional communication."/>