Confusing Strata With Their Units

Martin & Rose (2007: 4):

What is the relation between grammar, discourse and social context? Obviously cultures aren’t just a combination of texts, and likewise texts aren’t just a combination of clauses. Social activity, discourse and grammar are different kinds of phenomena, operating at different levels of abstraction: a culture is more abstract than a text, and the meanings that make up a text are in turn more abstract than the wordings that express them. The relation between these strata is described in SFL as realisation; social contexts are realised as texts which are realised as sequences of clauses.

Blogger Comments:

[1] To be clear, this is a rebranding of the SFL stratification hierarchy, with semantics misconstrued as discourse, and context — the culture as semiotic system — as social context, which is, in turn, equated with social activity.

[2] To be clear, in the SFL stratification hierarchy, context is realised by semantics, and semantics is realised by lexicogrammar.  Text is the highest unit on the semantic stratum, and clause is the highest unit on the lexicogrammatical stratum.