When you install or upgrade Oracle Inventory or Oracle Purchasing, Oracle provides two category flexfield structures by default: Item Categories and PO Item Category.
Each segment structure can display prompts and fields that apply specifically to a particular naming convention. For example, you might want one of your category sets to use two segments for the names of categories. Another item grouping scheme might use just one segment for the names of categories. You choose a flexfield structure for every category set and category that you define.
Product Line – Electronics, Machine, FMG
3. Define the item category flex field.
4. Filling up the value set of the stucture product information