In the course of analysis it is usually more convenient not to set up absolute divisions, e.g. word and phrase, and then say that various relations cross these divisions (e.g. syllabification rules cross word division in Hungarian but not in English). Instead, the domain of each element, or each relation among elements, is indicated when the element in question is set up. If many of these domains appear to be equivalent, as is frequently the case, that fact may then be noted and we may define a domain such as WORD or the like.
- Harris (1951), a pag.15, n.15