Canonical derivational morphology

The approach of Canonical Typology has proved fruitful for investigating a range of problems in syntax, inflectional morphology and most recently in phonology. It is therefore logical to take a canonical approach to derivational morphology. It provides a new perspective on some old issues, showing how previous key ideas fit together. The criteria proposed prove to have some degree of external justification. And from the point of view of canonical typology the results are particularly promising, since the criteria are interestingly different from those proposed in other domains.