The notion of head alignment was introduced to account for the observation that in a word with multiple feet, one is more prominent than the others. In particular, this notion is meant to capture the characteristic edge-orientation of main stress by requiring the (left or right) word boundary and the respective (left or right) boundary of the head foot to coincide (McCarthy & Prince 1993). In the present paper the notion of head alignment will be applied to compounds, which are also characterized by the property that one of their members, located in a margin position, is most prominent. The adequacy of an analysis in terms of head alignment hinges on the question of whether observable prominence peaks associate with the boundaries of independently motivated constituents. It will be argued that such links exist for German compounds, indicating reference to at least three distinct compound categories established on morphological grounds: copulative, phrasal, and a default class of “regular” compounds. The evidence for the relevant distinctions sheds light on morphological parsing, indicating that compound categories can be – and often are – determined by properties pertaining to their complete form, rather than by conditions affecting their (original) construction.
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