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Document Revision History

This table describes the changes to Model Object Implementation Guide.

Date	Notes
2008-02-08	Corrected the implementation example for setNilValueForKey:; updated the examples for dependent keys.
2007-10-31	Updated for Mac OS X v10.5.
2007-07-10	Corrected minor typographical errors.
2007-02-08	Corrected a link to "Managed Object Validation."
2006-09-05	Reorganized Validation article.
2006-04-04	Revised reference to Data Modeling article.
2006-03-08	Added example of interproperty validation; made minor correction to validation method (to check for null error parameter).
2006-01-10	Corrected a typographical error.
2005-06-04	New document that describes issues relating to the design and implementation of model objects

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