[OASIS Issue Tracker] (MQTT-204) Make $ topic separation normative

Allan Stockdill-Mander  created MQTT-204:
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             Summary: Make $ topic separation normative
                 Key: MQTT-204
                 URL: https://tools.oasis-open.org/issues/browse/MQTT-204
             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
          Issue Type: Improvement
          Components: core
            Reporter: Allan Stockdill-Mander 


Section 4.7.2.1 of wd-20 states;
A Topic Filter that starts with a wildcard character (# or +) does not match Topic Names that begin with a $ character

This appears to be a normative statement regarding server behaviour without any accompanying normative language.
While server implementations may choose whether or not to implement predefined $topics I thought we explicitly did want separate all topics starting with $ from the rest of the topic space.



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