FOMS (our Ficticious Online Music Shop) sells three types of product:
For each product type, there are a number of categories that items can fall into:
Each item has the following properties:
It would appear that there is a property missing from the above list, namely Category. The reason this is not included is that when the owner of FOMS is shipping items, they find them by product type and name. The different categories are only an aid to the user of the online shop.
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