This paper addresses the relationship between phonology and morphology
, using the vowel alternations of Standard German Umlaut and Ablaut as
relevant examples. Umlaut is analysed as a completely unified process
of vowel fronting which can be found in a wide variety of morphologic
ally derived environments. A number of nonlinear phonological analyses
of Umlaut, involving a floating feature, are presented and compared.
While Umlaut is interpreted, in current analyses, as a morphological r
ule, the present paper argues for its status as a lexical phonological
rule. Ablaut, on the other hand, is, synchronically, a totally unpred
ictable vowel change found mostly in the paradigms of so-called strong
verbs. On the grounds of its internal and external behaviour, it is a
rgued that this phenomenon must receive a completely different descrip
tion by means of additional specifications for lexical entries.