Doran, Martin & Herrington (2024: 194):
As we noted above, the opening sentence predicts that the following text will talk about archaea. This is done through participant tracking: the entity archaea is presented, and then referred to (in bold above) as this full branch of living beings and as archaea twice. In addition this entity is classified as not just some arcane microbe, an entire domain of life, and a whole living domain. The final reference to archaea occurs in the final clause archaea are now classified as a distinct, third domain of living creatures, that functions as a Hyper-New synthesising the point of the excerpt. This Hyper-New demarcates the boundary between this excerpt and the following text. But between the opening and closing sentences, the participant chain and classification (amongst other things), functions to sustain the chunk of information and make clear that we are still focusing in some sense on the same stretch of information.
Reviewer Comments:
To be clear, in SFL Theory, mode is the part language is playing in terms of the culture. Chunks of information, on the other hand, are language, as too is Martin's discourse semantic function of hyper-New, which is his rebranding of the notion of 'paragraph summary' in writing pedagogy.
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