neutron/releasenotes/notes/conditional_updates-10b9aa6...

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---
features:
- |
The Neutron API now supports conditional updates to resources with the
'revision_number' attribute by setting the desired revision number in
an HTTP If-Match header. This allows clients to ensure that a resource
hasn't been modified since it was retrieved by the client. Support for
conditional updates on the server can be checked for by looking for the
'revision-if-match' extension in the supported extensions.