28. The apparatus of claim 27 , wherein the data representing the plurality of answers from the user consists of at most one byte of data.
27. The apparatus of claim 26 , further comprising: type tree provision means for providing, to the user, a representation of a type tree including a plurality of types; wherein the discriminant representation means for providing further comprises means for receiving, from the user, input representing a branch of the type tree selected by the user; and wherein the means for generating comprises means for generating a data structure comprising data representing the plurality of answers from the user and the branch of the type tree selected by the user.