Halliday & Matthiessen (2014: 510-1):
… paratactic projection allows for a greater [speech functional] range: we can quote not only propositions and proposals but also minor speech functions such as greetings and exclamations … . This is part of the general principle whereby reporting reduces the potential for projecting dialogic features. For example, while Vocative elements can be quoted … they cannot be reported. … Adding this third systemic variable to our account, we can now expand Table 7-17: see Table 7-18.
