There are some categories that can be called convenience categories, as they limit the work a user needs to do in order to classify products.These categories combine two characteristics into one, for example the category ''potatoes'' and the label ''frozen'' are converged into one category: ''frozen potatoes''. | There are some categories that can be called convenience categories, as they limit the work a user needs to do in order to classify products.These categories combine two characteristics into one, for example the category ''potatoes'' and the label ''frozen'' are converged into one category: ''frozen potatoes''. |