Comment 1 for bug 1338121

I'm trying to triage this bug, and found this blueprint marked implemented.

https://blueprints.launchpad.net/keystone/+spec/service-catalog-version-support

The discussion of versioning seems to indicate MIME type is desired. Since this 2.0 document was considered a spec at the time, I'm a bit hesitant to change it "just" because it's not implemented. Does that match your understanding?