Martin (1992: 519-20):
The potential source of confusion here has to do with the fact that genre-structured texts tend to be heavily nominalised, and through grammatical metaphor construct fields as thing-like, whether referring to activities or not. Abstract modes in other words interpret social reality through semiotic resources that in less abstract modes would be applied to things — texts are organised around semiotic space instead of experiential time or place.
 This confuses ideational context (field) with ideational content (grammatical metaphor) of registers. The confusion is thus simultaneously along two theoretical dimensions: stratification and instantiation.
 The term 'abstract mode' confuses context (textual metafunction) with content (ideational metafunction). The confusion is thus simultaneously along two theoretical dimensions: stratification and metafunction.
 This confuses context (textual metafunction) with content (ideational metafunction — construing experience).
 The term 'social reality' blurs the distinction between ideational metafunction (construing experience as meaning) and the interpersonal metafunction (enacting intersubjective relations as meaning).