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I've had similar thoughts before myself.

IMO, The catalog should return version-less endpoints where those
endpoints return a "300 Multiple Choice".

The extra HTTP request is going to be painful though, in an attempt to
remain practical, a supportedVersions list could be returned by keystone.

Thanks,
Kiall

On 29/01/13 15:46, Jay Pipes wrote:
> I think versionList is pointless, as you mention above the proper way of
> handling this is a 300 Multiple Choice response on the base endpoint.
> The endpoints themselves should be the source of truth about what
> versions of an API they expose or support. Keystone, IMHO, should merely
> be a directory of endpoints/services, not a directory of endpoints and
> API versions on an endpoint.