0sd_c03 0DOC_CLASS and 0DEB_CRED

Hi,

How does 0DOC_CLASS and 0DEB_CRED of 0SD_C03 get populated??

DS used are 2LIS_11_VAHDR,2LIS_11_VAITM,2LIS_11_V_ITM,2LIS_12_VCHDR,2LIS_12_VCITM,2LIS_13_VDHDR,2LIS_13_VDITM.

Thanks

Prashant