While Requisition Import functionality has not vastly changed from 11i to R12, and the content of the note mostly applied, it is recommended that you use documentations intended for R12.
Here are some generic notes about Requisition Import you can use instead:
Frequently Asked Questions: Requisition Import (Doc ID 224025.1)
How To Diagnose Problems With Requisition Import (Doc ID 743666.1)
Master Note of Fixes for Requisition Import Error - This Item is Missing a List Price in the Item Master Setup (Doc ID 1534967.1)
Vision Demo - How To Create Requisitions Using Requisition Import? (Doc ID 944140.1)
Hope this helps.