namespace PhotoFlash::Data {
  entity Album in [Album];
  entity ScreenTime;
  entity User in [UserGroup] { account: Account };
  entity UserGroup;
  entity Account { age: Long };
  entity Photo in [Album] { owner: User };

  action edit appliesTo { principal: [User], resource: [Photo] };
  action view
    appliesTo {
      principal: [User],
      resource: [Photo, ScreenTime],
      context: {
        addr: { city: String, street: String },
        person: { age: Long, name: String },
        role: Set<String>
      }
    };
}