set ordered set Damion Dooley This data type is for items that have a unique order or rank with respect to each other in a set BUT NO meaningful DISTANCE metric exists between items aside from their position in the full set. "Favorite soft drinks" or "Favorite colours" or "Closest friends" are examples. Letters of the alphabet cannot be interpreted as ordinal with respect to their use in words, since no uniform rules exist about their placement in words. But they can be ordinal insofar as they are stated in a particular order in listing off the alphabet. A distance metric becomes possible if the items have units, e.g. 5cm or 10degrees celcius. The set's elements can then be mapped to one dimension. requires discussion