Hi Intel,
To replicate MM03 data into BW use the below data sources.
0MATERIAL_ATTR - this holds the entire material data from MARA tables.
0MAT_SALES_ATTR --> this holds data from MVKE
0MAT_PLANT_ATTR --> source table MARC
0MAT_ST_LOC_ATTR --> source table MARD
To extract Material Classification data we need to create a classification data source using CTBW. search on google or SCN where you can find documents which explain steps to create a classification data sources.
Regards
KP