Studierende stehen vor dem LC und blicken lächelnd einer Kollegin mit einer Mappe in der Hand nach.

Exercise No. 5: Material and Supplier

Partial Solution 1

a) Items (Item-#) belong to a category (Cat-ID). An (Item) category can be assigned to only one item. There is a hierarchical classification system of item categories. Each item category is assigned exactly to one category hierarchy.