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I thought I'll post this to the community. I am using coredata, and have two entities. Both entities have a hierarchical relationship. I am noticing quite a lot of duplicated functionality now, and am wondering if I should re-structure to have a base Entity which is abstract (HierarchicalObject), and make my entities inherit from them. So the question is are there some limitations of this inheritance that I should take into account? Reading some of the posts out there, I see a few trade-offs, let me know if my assumptions are correct. (Good) clean up structure, keep the HierarchicalObject functionality in one spot. (Ok) With inheritance, both objects now end up in the same sqlite table (I am using Sqlite as the backend). So if the number of objects grow, search/sorting could take longer? Not sure if this is a huge deal, as the number of objects in my case should stay pretty static. (not so good) With inheritance, the relationship could get more complicated? ( http://www.cocoadev.com/index.pl?CoreDataInheritanceIssues ) Are there other things to take into account? Thanks for your comments.

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