Martin (1992: 314):
Finally, possessive Deictics can be taken as elaborating where the relationship between the participant realised by the Deictic and that realised through the Thing are in part whole relation rather than an ownership one: the train's passengers or its wheels but not his passengers or its kittens.
Blogger Comment:
Logically, both composition (part/whole) and possession (ownership) are types of extension, not elaboration, in SFL theory.
