Referencing Outlet vs. Outlet
http://www.iphonedevsdk.com/forum/iphone-sdk-development/11838-referencing-outlet-vs-outlet.html
An outlet is an IBOutlet. I'll assume you know what that is.
The term referencing outlet means an outlet in another object that
references, or points to, the current object.
As an example, say you have a nib that has a File's Owner and a
UITableView in it, among other things. In order for a tableview to work
it has a datasource and delegate, which are outlets and can be
connected in IB. From the standpoint of the tableview the datasource
and delegate are outlets. From the standpoint of the File's Owner the
datasource and delegate in the tableview are referencing outlets.