Halliday & Matthiessen (2014: 20, 31-2)
… We have now introduced the major semiotic dimensions that define the ‘architecture’ of language in context. Some of these dimensions enable us to locate lexicogrammar in relation to the other sub-systems that make up the total system of language; these are known as global dimensions because they determine the overall organisation of language in context: the hierarchy of stratification, the cline of instantiation, and the spectrum of metafunctions. The other dimensions enable us to characterise the internal organisation of lexicogrammar and also of the other sub-systems of language, and of context; these are known as local dimensions because they operate locally within linguistic sub-systems. Let us summarise the semiotic dimensions of language in context under these two headings: see Table 1-7.
