What is the Objective-C equivalent of the Java Language Specification or the C++ Standard?

Is it this: http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Introduction/introObjectiveC.html ?

(I'm just looking for an (official) authoritative document which will explain the little nitty-gritties of the language. I'll skip the why for now :)

objective-c standards
Edit
Report