Classification: object dependencies

Dear experts,

I have a question regarding object dependencies. I want to set a default value on a batch class characteristic, which can be established by useing the $set_default functionality, but the value of the default value is inside the material classification view in a material class.

Is this possible in standard SAP by either using a function module or by directly referring to the table AUSP? If yes, can someone provide me some sample coding for this?

Thanks a lot,

Philippe