IBM has successfully implemented the OASIS MQTT Version 5.0 Committee Specification 1
http://docs.oasis-open.org/mqtt/mqtt/v5.0/cs01/mqtt-v5.0-cs01.docx dated December 25, 2017 in accordance with the conformance clauses Server and Client as defined in Section 7 (Conformance) of the specification. This use of the specification includes interoperation with other independent implementations. Ken Borgendale --
kwb@us.ibm.com Architect - IBM MessageSight and Watson IoT Messaging