Teeno files daalein (kisi bhi naam se, tool khud pehchan lega): mapping file (ID → CategoryID), category names file (CategoryID → Name), aur department hierarchy file (ID → MasterDept/Dept/Class/Subclass). Ek hi file mein sab kuch ho to bhi chalega.
Woh product/data file jismein category columns add karni hain.
Jis column se match karna hai (jaise SKU, ID, ProductID). Khali chorein to tool khud best column dhoondh lega.