In the material master on which view does the BOM appear?
If I wanted to ALE BOM's for an existing material, I am assuming that the IDOC BOMMAT is the correct IDOC and transaction BD30.
In which tables are material BOM's stored, I may need to use LSMW instead of ALE?
BOM tables are
STKO - BOM Header
STPO - BOM item
MAST - Material to BOM Link