India - Annual Survey of Industries 1994-95

Here again 4 sets of item code (NIC code in this case) is recorded. No document is available as to how this has been created.
There are 4 types of materials - Basic materials, Components, Chemical & auxiliary materials and Packing materials. These may be represented by 4 item codes.

Seems proceesing would be done for 5 major item code 99201-99205 and rest may be added to others (Value only).

Would be looked into this issue.