Hi Ed,
Below link is going to be use full to create classification of master data using Tcode-CTBW and after creating the classification of data source load the data into the DSO .
This data source is a delta capable.
One disadvantage of this data source is you can’t extract multiple values .
Before creating the data source you have to check these 2 notes:350296 and 535370.
No need of lookup just in the info set you can join 2lis_11vaitm and new DSO.
http://affine.co.uk/cms/uploads/How_to_Extract_Classification_Data_into_BW.pdf
http://scn.sap.com/docs/DOC-28359
Do let me know in case of questions/concerns.
Thanks