In the past few decades, the field of phonology has witnessed the development of an assortment of phonological theories and their offshoots. Seminal among them is the theory of
Prosodic Phonology
, which explores how prosodic structure is built in relation to morphosyntactic structure. Prosodic Phonology employs mapping rules that aim at organizing chunks of structure (e.g. strings smaller or larger than the grammatical word) into hierarchically ordered layers of prosodic units which, in turn, form the domains within which phonological rules apply. Such
phonological domains
need not be isomorphic to morphosyntactic constituents. More importantly, the existence of a mapping mechanism entails that rules of phonology proper (i.e. rules inducing changes in the phonological shape and pattern of a string of elements) do not make direct reference to morphosyntactic constituents.
1
In general, the basic tenet of Prosodic Phonology is that phonological rules cannot see nor refer to any structure other than the units of the
Prosodic Hierarchy
(Selkirk 1978b, 1980, 1981a, 1981b, 1984, 1986, 1995; Nespor and Vogel 1982, 1986; Hayes 1989; see also
chapter
syllable‐internal structure
,
chapter
the foot
,
chapter
stress‐timed
VS
.
syllable‐timed languages
,
chapter
the skeleton
,
chapter
root—affix asymmetries
, and
chapter
sign syllables
for some other aspects of the Prosodic Hierarchy):