Here a rough draft of the use-cases I can see valuable for us:

UseCase.1: Machine-readable file containing the name of objects as well as the name of possible relationships and permissions.

> allows generating the necessary string constants and can do basic validation of queries client-side



UseCase.2: Machine-readable file containing the name of objects as well as the name and type of possible relationships as well as the name of permissions.

> Allows generating type-safe builders for relationships. Helps creating/removing relationships.



UseCase.3: Machine-readable file containing the name of objects as well as the name and type of possible relationships. Furthermore, have all the predicate information for permissions.

> Allows generating type-safe code to create relationships and check permissions. E.g. generate type-safe methods for things such as `can<Permission><Object>(<Object>, <Subject>) which would then be canWriteDocument(Document d, User u) whereas Document and User are actual generated types and the method would check the document:<id>#write@user:<id> permission