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Being a child of, being included in... You can of course manage all those relations in a relational database but the job is done by you, not by the database.

• andrewcooke 13y ago
  but isn't the point of being able to implement any relationship you want rather than having a few particular kinds (child of, included in) "built in" a feature? are you going to extend your database every time someone wants a different kind of relationship?
  • jclevy 13y ago
    Yes, but usual relations could be implemented by default and generic relation still be available. I just want to test this and see if the database can do more and my code less.