Document Revision History

This table describes the changes to NSNotificationCenter Class Reference.

Date	Notes
2009-09-01	Corrected method heading for addObserverForName:object:queue:usingBlock:. Added trailing colon.
2009-08-28	Added addObserverForName:object:queue:usingBlock: method.
2009-05-15	Updated for Mac OS X v10.6.
2008-07-11	Removed a statement that the observer parameter can be nil in the removeObserver:name:object: method.
2007-04-02	Updated for Mac OS X v10.5
2006-11-07	Clarified how a notification center manages observers in its dispatch table.
	Updated return type of defaultCenter.
2006-05-23	First publication of this content as a separate document.

---