Cal/EPA has released the final CERS EDT Schemas (Version 1.00), which are available at:
http://cers.calepa.ca.gov/TempDocs/EDT/CERS2EDT-Ver-1dot00.zip

Cal/EPA considers these XML Schemas as final unless Cal/EPA or EDT clients uncover any serious errors that could not be ignored or reasonably worked around in client and/or server code. Cal/EPA will recommend to the Unified Program's Data Steering Committee that any future schema changes be staged annually, with the first adoption deadline being a specific date sometime in the March 2013-October 2013 timeframe, and technical implementation in CERS and local systems occurring in an 8-16 month timeframe after that, depending upon the nature and complexity of the changes.

In late May 2012 Cal/EPA will release draft/testing EDT web services for Facility Submittal Exports, Action Notifications, and the Violation/Chemical Libraries. Cal/EPA anticipates a production release of these services during July 2012. In late 2012 Cal/EPA will implement additional web services for Facility Submittals (needed by local reporting portals) and CME data (inspections/enforcements).

[A more detailed version of this message was cross-posted on the CERS EDT Implementers listserv]