Structural operations — inserting elements, ordering elements, and so on — are explained as realising systemic choices. … When we speak of structural features as ‘realising’ systemic choices, this is one manifestation of a general relationship that pervades every quarter of language. Realisation derives from the fact that a language is a stratified system.
Wednesday, 16 November 2016
Halliday & Matthiessen (2014: 24):