Hi With the current REST API engine in neutron we can declare attributes validations. We have a rich set of validation functions https://github.com/openstack/neutron/blob/master/neutron/api/v2/attributes.py However we do not have the concept of entity level validation. Example: I have an API ‘create-something’ and Something is an entity having 2 attributes: Something { Attribute A Attribute B } And according to the business logic A must be greater than B As for today our framework cannot handle this kind of validation and the call is going inside a lower layer of neutron and must be validated there. Example: https://review.openstack.org/#/c/93871/9 With this we have the validations implemented across multi layers. I think we better have the validations in one layer. Thanks Avishay -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20140605/572e39be/attachment.html>