Add Version Based Feature Discovery in Technical Vision
As discussed in original proposal of OpenStack Technical Vision patch[1] and in summit also[2], this commit adds the "Version Based Feature Discovery" information under Bidrectional Compatibility section. [1] https://review.openstack.org/#/c/592205/5/reference/technical-vision.rst@132 [2] http://lists.openstack.org/pipermail/openstack-discuss/2018-December/000431.html Change-Id: I4a3bb3a2df80ad65df47e937b506f7ac2500a158
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@ -133,6 +133,9 @@ move to another cloud running an older version of OpenStack. OpenStack services
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should therefore evolve in such a way that they either work correctly or fail
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gracefully with *both* older and newer clients.
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Any changes to public APIs should be versioned and phased in, with a common
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mechanism to allow client introspection of the available versions and features.
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Cross-Project Dependencies
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--------------------------
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