1 Introduction
1.1 Audience
AEMO Australian Energy Market Operator provides this information as a service targeting business analysts and IT staff in Registered Participant See Relevant Rules or Procedures companies.
1.2 Objective
The EMMS Energy Market Management System (formerly MMS); software, hardware, network and related processes. - Technical Specification - Data Model The definition of the interface to participants of data published by AEMO for gas or electricity. A database conforming to the Data Model can contain a local copy of all current participant-specific data recorded in the main database. The Data Model includes database tables, indexes, and primary keys. v5.6 - November 2025 (Release) describes the projects planned by AEMO from a participant perspective and includes any system related changes for participants.
1.3 Status
|
Version |
Status |
|---|---|
|
3.01 |
Final. The Data Model is available in Production. |
|
3.00 |
Final. The Data Model is available in Production. |
|
2.02 |
The Data Model design is ready for participant builds. The design is certified so no major changes are planned. However, there may be minor changes due to current testing. |
|
2.01 |
The Data Model design is ready for participant builds. The design is certified so no major changes are planned. However, there may be minor changes due to current testing. |
|
2.00 |
The Data Model design is ready for participant builds. However, there are a few critical changes identified by business. |
|
1.02 |
The Data Model design is ready for participant builds. The design is certified so no major changes are planned. However, there may be minor changes due to current testing. |
|
1.01 |
In progress. The design is not ready for participants’ builds Improving Security Frameworks (ISF) – Design complete estimation – 80% Operational Forecasting – Design complete estimation – 80% ST PASA Procedure and Recall Period – Additional updates – 90% Frequency Performance Payments (FPP) Settlements – Additional updates – 90% |
|
1.00 |
In progress. The design is not ready for participants’ builds Improving Security Frameworks (ISF) – Design complete estimation – 10% Operational Forecasting – Design complete estimation – 10% |
|
0.01
|
Presents the EMMS - Technical Specification - Data Model v5.6 - November 2025 evolving design. Please send feedback to Contact Us. In the Details of your enquiry section, mention the EAS Knowledge Management team as the Resolver group. |
Initial Draft for review. The design is not ready for participants’ builds
1.4 Release dates
Scheduled for implementation in:
-
Pre-production: Tuesday 14 October 2025
-
Production: Wednesday 19 November 2025
1.5 Rule and procedure changes
For details, see the Rule and procedure changes section in EMMS – Technical Specification – 2 December 2025
1.6 Related technical specifications
|
Title |
Project |
|---|---|
|
ST PASA Procedure and Recall Period |
|
|
Frequency Performance Payments (FPP) Settlements |
|
|
Improving Security Frameworks (ISF) |
1.7 Related documents
These guides and resources are updated according to this technical specification and published by the dates below.
|
Title |
Description |
Published |
|---|---|---|
|
Help for participants using Data Interchange and the Data Model |
See Release Dates in Timeline |
|
|
Explains the packages, tables and reports in the Electricity and Gas Data Models |
||
|
Release Notes |
1.8 Approval to change
AEMO gained approval to proceed from all participant change controllers on close of business Monday, 7 July 2025.
1.9 Market systems user group meetings
The Market Systems User Group (MSUG Market Systems User Group) is an industry user group established to discuss NEM wholesale and retail IT systems releases. Its purpose is to facilitate the continuing improvement of AEMO's IT systems by seeking feedback and collaboration from participants.
MSUG meetings are open to all interested parties, with invitations sent to all included on the distribution list. If you have a technical question for a project and want to attend the MSUG ask your company’s support team to include your email address in their AEMO Help Desk Bulletin (CRM) distribution list.
1.10 Version numbers
Incremental version numbers such as 1.01, 2.01 and so on mean there is a minor change to the technical specification.
Major version numbers such as 1.00, 2.00 means there are substantial changes to the technical specification. Participants must carefully review these changes, detailed Page 1.
1.11 Changes in this version
The changes in this version are:
-
Data Model v5.6 is now available in Production.
-
Updates to Participant interfaces changes.