we have:
https://github.com/FriendsOfSymfony/FOSRestBundle/blob/master/Resources/config/schema/routing/rest_routing-1.0.xsd
https://github.com/FriendsOfSymfony/FOSRestBundle/blob/master/Resources/config/schema/routing-1.0.xsd

ie.

``../../Resources/config/schema/routing/rest_routing-1.0.xsd``
``../../Resources/config/schema/routing-1.0.xsd``