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Release notes
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E3 (in progress - coming January 26, 2012)
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* Portable identifiers: modifiable, string ID in database backend
* Contract compliance: version response and ATOM, 300 multiple choice

See https://launchpad.net/keystone/+milestone/essex-3


E2 (December 15, 2011)
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* D5 compatibility middleware
* Database versioning
* Much more documentation: http://keystone.openstack.org

See https://launchpad.net/keystone/+milestone/essex-2
