Hello everyone! Some month ago I sent a mail asking to ensure that all FAMIXEntities could answer to all MooseQuery queries. The answer was no because the community does not want some entities to be able to answer to every query. (For example to have associations that can answer to navigation queries). This bothered me because we already have entities that can answer to #children, #parents, #toScope:, #atScope:... even if it does not make any sense. Now I come back with a proposition to clean this half/half state and to get a clean model query side. I discussed these changes with Anne and she agrees with them. In the current state of MooseQuery we have: - TMetaLevelDependency used by FAMIXEntity that allow querying the children, parents, and scopes of an entity - TEntityMetaLevelDependency using TMetaLevelDependency. It adds the navigation queries. - TAssociationLevelDependency using TMetaLevelDependency. It adds some useful methods to associations for the navigation queries. We have two changes to propose. First. It does not make any sense for TAssociationMetaLevelDependency to use TMetaLevelDependency since an association should not be able to answer to #children, #parents, #toScope:... We propose to remove this usage. I did this change in an image and launched MooseQuery/Chef tests, everything is green. Second. TMetaLevelDependency does not make any sense when we have TEntityMetaLevelDependency. All the methods of TMetaLevelDependency are related to entities. We propose to copy all the methods of TMetaLevelDependency to TEntityMetaLevelDependency and remove it. TMetaLevelDependency has two users: FAMIXEntity and TEntityMetaLevelDependency. Since we copy the methods to the second user, there is no problem with it. The biggest change is that now FAMIXEntity will not implement any Meta trait. It does not need to use any since all its subclasses should not understand generic queries. The only change that needs to be done is to move the caches created on FAMIXEntity to the users of TEntityMetaLevelDependencies. I tried to apply this changes in a quick and dirty way to an image and once again all tests seem to pass. In conclusion, what do we win with this changes? All Famix entities will only understand the queries they can answer to. FAMIXAssociation, FAMIXSourceAnchor, FAMIXSourceLanguage will not understand anymore #children, #parents, #toScope:, #atScope:... Have a nice day :)