What is Nested Attachment ?

Question

Hi I hope I get a detail reply on this. 
 What is Nested Attachment ? What is Live Nesting, Nesting Depth ? When it should be done ? 
 I have been using "Coincident World" as attachment Method all the time. How is Nested attachment different from Nested attachment ?

PEvans · Answer

Suppose that file B has file C attached as a reference file. 
 You are in file A and attach file B as a reference file. If live nesting is on you will see file B and file C in your drawing. 
 If file C had file D attached as a reference and you set the nest depth to 2 you would see files B, C and D while in file A. 
 
 Coincident World attachment is a completely different thing than live nesting. Coincident World is a method of aligning the coordinate systems. Live nesting determines how many files are coming with the reference attachment. 
 hth