Thompson (2014: 42-3):
If we now turn, more briefly, to genre, this can be seen in very simple terms as register plus communicative purpose: that is, it includes the more general idea of what the interactants are doing through language, and how they organise the language event, typically in recognisable stages, in order to achieve that purpose. An image that may help you to grasp the difference between register and genre is to see register as cloth and genre as garment: the garment is made of an appropriate type of cloth or cloths, cut and shaped in conventional ways to suit particular purposes. Similarly, a genre deploys the resources of a register (or more than one register) in particular patterns to achieve certain communicative goals.
Blogger Comments:
To be clear, in SFL Theory, 'communicative purpose/goal' is rhetorical mode, a textual system of context. Every register realises the mode as well as the field and tenor of a situation type. The notion of 'genre' here is thus redundant.
Thompson's aim here was to include Hasan's notion of genre in his coverage of SFL, but Hasan herself identified her 'genre' as Halliday's 'register'.
