Simple example of using a Transformable object as part of a CoreData model. Use it only for very simple objects, with no relations.

MOFAddress.h

@interface MOFAddress : NSObject <NSCoding>

@property (nonatomic, strong) NSString *city;
@property (nonatomic, strong) NSString *number;
@property (nonatomic, strong) NSString *street;
@property (nonatomic, strong) NSString *postCode;
@property (nonatomic, strong) NSString *location;

@end

MOFAddress.m

@implementation MOFAddress


- (id)initWithCoder:(NSCoder *)decoder {
    self = [super init];
    if (self) {
        self.city = [decoder decodeObjectForKey:@"city"];
        self.street = [decoder decodeObjectForKey:@"street"];
        self.number = [decoder decodeObjectForKey:@"number"];
        self.postCode = [decoder decodeObjectForKey:@"postCode"];
        self.location = [decoder decodeObjectForKey:@"location"];
    }
    return self;
}

- (void)encodeWithCoder:(NSCoder *)encoder {
    [encoder encodeObject:self.city forKey:@"city"];
    [encoder encodeObject:self.street forKey:@"street"];
    [encoder encodeObject:self.number forKey:@"number"];
    [encoder encodeObject:self.postCode forKey:@"postCode"];
    [encoder encodeObject:self.location forKey:@"location"];
}

@end

Others

//Define the address as a Transformable in your Model class that contains the address
T addressData Transformable

//Create a category if you want type checks

@property (nonatomic, strong) MOFAddress *address;

- (void)setAddress:(MOFAddress *)address {
    self.addressData = address;
}

- (MOFAddress *)address {
    return self.addressData;
}