Re: NSPredicate and related classes ?

[hns]

Neither...

NSPredicate and NSExpression are defined in Foundation - they simply
describe a query. They evaluate on NSObjects (NSString, NSArray,
NSNumber, NSDictionary etc.). A reference is
http://cocoadevcentral.com/articles/000086.php (page 14).

Storage (Core Data) is not handled by Foundation. NSManagedObject* and
NSPersistent* are part of a separate CoreData framework on MacOS X.

At the moment I have not started to include anything from CoreData =>
http://developer.apple.com/documentation/Cocoa/Reference/CoreData_ObjC/index.html

But if I would, I would use SQLite and XML since they are directly
supported by the API (NSPersistentStoreCoordinator: NSSQLiteStoreType,
NSXMLStoreType).

-- hns