::::I undid the move you did, Enric, was obviously could not have been considered uncontroversial in light of this discussion.  Also verified that the noun/adj. phrase distinction is in Witkin's original and subsequent papers:  and .   The unhyphenated form was adopted by others independent of Witkin's team, like ,  , .  It's just English; no reason to punish the reader by making the structure more ambiguous.