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Core Data is a framework that you use to manage the model layer objects in your application. It provides generalized and automated solutions to common tasks associated with object life cycle core data error validating url store object graph management, including persistence. Core Data typically decreases by 50 to 70 percent the amount of code you write to support the model layer. This is primarily due to the following built-in features that you do not have to implement, test, or optimize:.

Change tracking and built-in management of undo and redo beyond basic text editing. Maintenance of change propagation, including maintaining the consistency of relationships among objects. Lazy loading of objects, partially materialized futures faultingand copy-on-write data sharing to reduce overhead. Automatic validation of property values. Managed objects extend the standard key-value coding validation methods to ensure that individual values lie within acceptable ranges, so that combinations of values make sense.

Schema migration tools that simplify schema changes and allow you to perform efficient in-place schema migration. Sophisticated query compilation. Version tracking and optimistic locking to support automatic multiwriter conflict resolution. Creating a Managed Object Model. All rights reserved. Terms of Use Privacy Policy Updated: Core data error validating url store Data Programming Guide.


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