# New EHR reference model draft

**Category:** [Technical (archive)](https://discourse.openehr.org/c/technical-archive/156)
**Created:** 2002-08-15 13:05 UTC
**Views:** 4
**Replies:** 0
**URL:** https://discourse.openehr.org/t/new-ehr-reference-model-draft/12010

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## Post #1 by @thomas.beale

Dear all,

a new draft of the openEHR EHR reference model is available at http://www.deepthought.com.au/health/openEHR/rm/ehr_rm_3_3_1.pdf.

While there is still a lot of work to do, the models are solid enough to start being used\. The main change from previous versions is the addition of a Change\_control cluster to define the semantics of versioning generically, and the use of these semantics for versioning of Transactions\.

All comments welcome\.

\- thomas beale

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**Canonical:** https://discourse.openehr.org/t/new-ehr-reference-model-draft/12010
**Original content:** https://discourse.openehr.org/t/new-ehr-reference-model-draft/12010