We looked today at Martin Joos' five-part system for analysing the register of a text, beyond just formal/informal, but instead classifying texts (or elements of texts, as we saw), along a five-position scale.
this article gives some further discussion of Joos' system., and lays out a helpful table of the five clocks against four features of texts. it includes some more examples and features that help identify the five clocks at work.
http://ww2.odu.edu/al/jpbroder/jpb_on_joos_1976.pdf
