Figure 1. A three-dimensional representation of a paradigmatic classification of three dimensions (upper case letters, Roman numerals, and Arabic numerals).

For example, any item possessing the attributes “I”, “C”, and “2″ would fall into the blue square class, while any item possessing the attributes “II”, A”, and “1″ would fall into the green square class. Redrawn and modified from (Figure 4 in [36]: 72).