Halliday & Matthiessen (2014: 553, 554):
Table 7-30 summarises the intonation patterns that have been discussed in this chapter as realising systemic selections within the clause complex. These include (i) tone concord: sequences of two or more instances of the same tone; (ii) tone sequences: sequences of two tones, 1 1, 3 1, 4 1; (iii) tonality: post-tonic prolongation of tone group.
