The weakest kind of linkage is that which depends only on the form classes from which each IC is drawn. Thus ‘black | cat’ consists of two Ics, each a single morpheme. We know that the two belong together, and that the first is attributive to the second, simply because that is the way in which forms like ‘black’ and ‘cat’ work. This may be called linkage by ‘selection’.
- Hockett (1958), a pag.214