Basics for Batch Classification Data

Question

Hello Experts ,
I have few queries for Batch Classification Data .
1. Which are the tables where Batch Classification Data for the batches is stored .
2.Which Function module is called once we do the Goods movement which determines the batch
classification data .
3.When we do stock transfer for batches , then the Batch classification will run in Issuing plant and
the batch classi. data will be copied in the receiving plant . Can you please tell me that which object
carries this data from issuing plant to receiving plant.
4.There is also a user exit with which we can play with Batch classification , can you please give some information on this .
Thank you very much for the help !
Regards
Shashank

Answer 1

1. The table is AUSP - but why would you need to know that. There are good function modules to query, read, change classifications of batches - so why would you like to read directly from DB?
2. This depends on your release. Typicall in MIGO the module VB_CREATE_BATCH is called, the same one that is called within the BAPI to create batches.
3. See 2. When you create a batch with reference, you call the same module additionally with the key of the reference batch (this is the issueing batch). 
Inside that module are loads of user exits for all kind of purposes.
Why not have a look yourself in Customizing at Logistics General -> Batch Management -> Batch Valuation.
There's the "customer exits for goods movements in inventory management" (this is called e.g. in the goodsmovement bapi and the old transactions)  --> EXIT_SAPMM07M_004
and the  "Valuation of Creation of New Batches Using Function Module" (this is called in the MSCxN and in MIGO) --> EXIT_SAPLV01Z_014 .
In Customizing there's also the documentation what you can achieve with the exits.
Hope this helps.
Stefan