Functional discourse grammar

Functional grammar (FG) and functional discourse grammar (FDG) are grammar models and theories motivated by functional theories of grammar. These theories explain how linguistic utterances are shaped, based on the goals and knowledge of natural language users. In doing so, it contrasts with Chomskyan transformational grammar. Functional discourse grammar has been developed as a successor to functional grammar, attempting to be more psychologically and pragmatically adequate than functional grammar.

The top-level unit of analysis in functional discourse grammar is the discourse move, not the sentence or the clause. This is a principle that sets functional discourse grammar apart from many other linguistic theories, including its predecessor functional grammar.

Functional grammar (FG) is a model of grammar motivated by functions. The model was originally developed by Simon C. Dik at the University of Amsterdam in the 1970s, and has undergone several revisions since then. The latest standard version under the original name is laid out in the 1997 edition, published shortly after Dik's death. The latest version features the expansion of the model with a pragmatic/interpersonal module by Kees Hengeveld and Lachlan Mackenzie. This has led to a renaming of the theory to functional discourse grammar. This type of grammar is quite distinct from systemic functional grammar as developed by Michael Halliday and many other linguists since the 1970s.

The notion of "function" in FG generalizes the standard distinction of grammatical functions such as subject and object. Constituents (parts of speech) of a linguistic utterance are assigned three types or levels of functions:

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