Lexical knowledge representation at the phonological level of description is usually segmental, based on phonemes or feature representations. A standard feature bundle representation is just a simple sequence of segments which contains no explicit temporal information. For particular speech tasks, however, a nonsegmental description based on autosegmental representation, gestural scores or event representations may be more desirable. In the discussion which follows, we will extend our descriptions to deal with nonsegmental representations.
2. Feature representations3. Multilinear descriptions
4. Time map domain