Description
The MQTT version 3.1 spec contribution.
The zip file contains the specification for the version of MQTT that has been used in the field for many years. It is being contributed as the starting point / basis for creating the OASiS MQTT Standard.
It contains both a PDF as well as HTML source.
This version of the spec is also publically available under a royalty free licence here:
http://www.ibm.com/developerworks/webservices/library/ws-mqtt/index.html