Martin (1992: 510-1):
Two-way visual context [contact?] means that any attendant semiosis that is realised visually can be brought into play (kinesics, proxemics, the social action in which the speaker/listener dyad is engaged and so on). This increases the potential for a text to depend on its material context, as part of the accompaniment to what is going on.
This confuses two distinct notions in SFL theory:
- the rôle of language as constitutive or ancillary (mode), and
- the relevance of the material setting in manifesting the (semiotic) context of situation.
Halliday (2007 : 278):
The setting, on the other hand, is the immediate material environment. This may be a direct manifestation of the context of situation, and so be integrated into it: if the situation is one of, say, medical care, involving a doctor and one or more patients, then the setting of hospital or clinic is a relevant part of the picture. But even there the setting does not constitute the context of situation …