* A filter group can be owned by a user or a project.
* The name of a filter is unique only among projects and filters with the same owner_uuid.
* Filters can be targets (@head_uuid@) of permission links, but not origins (@tail_uuid@). Putting a filter in a @tail_uuid@ field is an error.
* A filter group can be owned by a user or a project.
* The name of a filter is unique only among projects and filters with the same owner_uuid.
* Filters can be targets (@head_uuid@) of permission links, but not origins (@tail_uuid@). Putting a filter in a @tail_uuid@ field is an error.