Part I of Representing Phonological Detail focuses on the latest phonological research on a range of issues. The first main theme in this volume is vowel representation, with special attention paid to topics such as vowel harmony and other vocalic processes (e.g., historical umlaut, vowel epenthesis, and the representation of vowel quality and height). The second main theme is consonant representation and consonantal processes (including laryngeal phonology and stop insertion). Finally, the acquisition of phonology and the interface between phonology and morphosyntax are examined, attending in particular to boundary symbols, morphological blends, and the status of recursion in phonology and syntax.