Hi, I've got a problem in defining the structure of a core data model.
I have data fields that come from a record (row) that was imported from a file, so it's like an array of numbers which is currently unknown until the user assigns meaning to these data fields. I'm wondering if an entity can have a property w/ an array (or variable length of types) type of data. My reasoning is that these variable number of datas are all part of the same record or problem set. So, using Core Data I have an Entity (entityA) which has a one-to-many relationship with EntityB (entityB being the variable number of data fields which usually have the same meaning and are specific to a single data pattern). EntityA defines the algorithm and other parts of the problem. I know I don't want to just assign a bunch of empty properties and guesstimate what the largest number of properties would be for my users, cause I'd be wrong. And I also know that my users can assign any meaning (field name) to a single data item that they want to experiment with. But it really seems like my entity should be a single pattern (row) of data from the files I read in since a row in itself is a complete problem data set (problem is, it can be variable length and the user has to assign meaning which I don't' have at the point of importing it into Core Data (and by the time the user does assign meaning, I'd lose many benefits of using Core Data since the solution is almost finished). examples of data from files … --- -0.749318 0.0892089 -1 -0.171308 0.167947 1 -0.651408 0.923422 -1 --- 5.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 6.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 7.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 8.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Any suggestions? _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
