What is scope in SQL Server / how is it defined?

Question

I am trying to find documentation on SQL Server where concept of scope is defined. I just want to understand it better.

I had been looking at scope_identity() function and it says that @@identity result and scope_identity() result will differ in case there are triggers defined which insert records into another table with an identity column.

It seems scope_identity() decides that insert in the trigger is in different scope. I want to see how that is determined/where it is documented...

Solution

A scope is a module: a stored procedure, trigger, function, or batch. Therefore, two statements are in the same scope if they are in the same stored procedure, function, or batch.

https://msdn.microsoft.com/en-us/library/ms190315.aspx