if the originating host does not support the concept of user ids.
SDPOrigin.username
string username() @propertyGet username field.
Returns
the user's login on the originating host, or it is "-"
void username(string propval) @propertySet username field.
Parameters
propval | the user's login on the originating host, or it is "-" if the originating host does not support the concept of user ids. |