Hi PY,
When you say classification extraction then why your looking 2LIS_11_VAITM data source. As you know 2LIS_11* is LO data sources for sales.
For classification we have different ETL. please check the Data Source - 1CL_OMAT001
Tx - CTBW(at ecc system)
for more details you can get from google by search term "Extraction material classification into bw".
Thanks