Ditto Protocol topic structure for connections
A valid topic consists of four elements, describing the connection affected by this message and the type of the message:
_: empty field.
connectionId: the ID of the connection.
group: the group for addressing connections is
criterion: the type of protocol messages addressing connection announcements is
subject: for announcements the
subjectcontains the announcement name
Note: The topic path of the connections group does not contain a namespace since there is no correlation between namespaces and connections. Also there is no channel unlike the things group.