Diatype is a term first used by the linguist Michael Gregory to describe a type of language variation which is determined by its social purpose. In his formulation, language variation can be divided into two categories: dialect, for variation according to user (eg. African American Vernacular English), and diatype for variation according to use (eg. the specialised language of an academic journal).
| Diatype | Dialect |
|---|---|
| Defined by use | Defined by user |
| Intra-speaker variation | Inter-speaker variation |
| Discourse community | Speech community |
| Field, tenor, mode | Geographic, social, temporal |
The distinction between the terms is not always clear; in some cases a language variety may be understood as both a dialect and a diatype. The term register is often used in place of 'diatype'. The terms style and genre can also overlap in meaning.
Three variables of dialect are:
Diatype is usually analysed in terms of:
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