==================
Basics
==================

model
  schema 1.2

type merchant # module: core, file: core.module.fga
  relations
    define accountant: [user]
    define admin: [user] or owner

---

(source_file
  (model
    (schema
      (version)))
  (type_declaration
    (identifier)
    (comment)
    (relations
      (definition
        (identifier)
        (relation_def
          (direct_relationship
            (identifier))))
      (definition
        (identifier)
        (relation_def
          (direct_relationship
            (identifier))
          (operator)
          (identifier))))))
