Document Revision History

This table describes the changes to Key-Value Observing Programming Guide.

Date	Notes
2016-09-13	Clarified a number of topics and updated the code examples.
2012-07-17	Updated to use new Objective-C features.
	ARCification
2011-03-08	Clarified terminology in "Registering Dependent Keys."
2009-08-14	Added links to some key Cocoa definitions.
2009-05-09	Corrected minor typo.
2009-05-06	Clarified Core Data requirement in Registering Dependent Keys.
2009-03-04	Updated Registering Dependent Keys chapter.
2006-06-28	Updated code examples.
2005-07-07	Clarified that you should not release objects before calling willChangeValueForKey: methods. Noted that Java is not supported.
2004-08-31	Corrected minor typos.
	Clarified the need to nest manual key-value change notifications.
2004-03-20	Modified source example in Registering Dependent Keys.
2004-02-22	Corrected source example in Registering for Key-Value Observing. Added article Key-Value Observing Implementation Details .
2003-10-15	Initial publication of Key-Value Observing.