"ZigBee Smart Energy version 2.0 will be IP-based and offer a variety of new features. Given the important role ZigBee Smart Energy plays in the Smart Grid, the ZigBee Alliance is taking unprecedented steps for an open organization engaged in standards development. It has made three documents that guide development available for public review: Market Requirements Document, draft Technical Requirements Document and the draft 0.7 Specification."
The ZigBee Alliance has released the Draft 0.7 Document of ZigBee Smart Energy 2.0 which follows the release of draft Technical Requirements Document (TRD) for ZigBee Smart Energy 2.0 last month. It is now available for public review. The next draft to be shared publicly will be the 0.9 document of ZigBee Smart Energy 2.0 and it will be posted once the specification has passed development milestones.
Source: Zigbee Alliance