The interaction of the dimensions within a cluster is not yet very well studied, so for a partial solution, we make the simplifying assumptions that the dimensions of a cluster are independent and that each can be reduced to a true numeric dimension.
16 two distinctions d 1 and d 2 are commensurate if the following two conditions hold: • d 1 and d 2 are of the same type (i.e., stylistic, expressive, or denotational).