[The] consistent interplay between theoretical and applied pursuits has always been a defining feature of systemic functional theory... This kind of mutual enrichment is clearly demonstrated in Alice Caffarel's work. The result is a description which penetrates to the heart of the language, revealing it at one and the same time as a specimen of the human semiotic and a unique resource for the continuous creation of meaning.' Professor M A K Halliday, from the Preface.