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Chapter 10. Core Data > Attribute Types
10.3. Attribute Types
Core Data attributes are more limited than Objective-C instance variables. They can only store a small number of basic types. These are similar to the data types implemented by Foundation, with some C types.
Integer 16 values are 16-bit integers, represented by an NSNumber.
Integer 32 values are 32-bit integers, represented by an NSNumber.
Integer 64 values are 64-bit integers, represented by an NSNumber.
Decimal values correspond to binary-coded decimal data, represented by an NSDecimalNumber.
String values are Objective-C strings, represented by an NSString subclass.
Boolean values are either true or false, and are represented by an NSNumber.
Date values correspond to a date, represented by an NSDate.
Binary data values are raw data stored in an NSData.
