Editing Michael Halliday (section)

===Grammar as functional===
Halliday's grammar is not just ''systemic'', but ''systemic functional''. He argues that the explanation of how language works "needed to be grounded in a functional analysis since language had evolved in the process of carrying out certain critical functions as human beings interacted with their ... 'eco-social' environment".<ref name=Meaning /> Halliday's early grammatical descriptions of English, called "Notes on Transitivity and Theme in English – Parts 1–3"<ref>M.A.K. Halliday, 1967/68. ''Journal of Linguistics'', 3.1, 1967; 3.2, 1967; 4.2, 1968. In Halliday, 2005, ''Studies in English Language'', Vol. 7 in ''The Collected Works''.</ref> include reference to "four components in the grammar of English representing four functions that the language as a communication system is required to carry out: the experiential, the logical, the discoursal and the speech functional or interpersonal".<ref>M.A.K. Halliday, 1968. ''Journal of Linguistics'', 4.2, 1968; in Halliday, 2005, ''Studies in English Language'', Vol. 7 in ''The Collected Works'', p. 145.</ref> The "discoursal" function was renamed the "textual function".<ref>Halliday, M.A.K. 1970. "Functional Diversity in Language as seen from a Consideration of Modality and Mood in English. Foundations of Language", ''International Journal of Language and Philosophy'', 6, pp. 322–61; in Halliday, 2005, ''Studies in English Language''.</ref> In this discussion of functions of language, Halliday draws on the work of [[Karl Bühler|Bühler]] and [[Bronislaw Malinowski|Malinowski]]. Halliday's notion of language functions, or "[[metafunctions]]", became part of his general linguistic theory.