Stratification

The topic of stratification covers both the question of how the domain of application is to be stated for particular rules, and the related and more complex matter of the number of lexical levels. We have seen that, although Booij and Rubach (1987) attempt to limit the lexicon to two levels, Halle and Mohanan (1985) propose four strata. Any limitation will depend on the shape of affixation processes and the possibility of reference by phonological rules to morphological boundaries.