The main research of descriptive linguistics, and the only relation which will be accepted as relevant in the present survey, is the distribution or arrangement within the flow of speech of some parts or features relatively to others.
- Harris (1951), a pag.5

The most obvious way to indicate the arrangement of morphemic segments within an utterance is to say that each utterance can be completely and uniquely identified not simply as a sum of segments, but as an ordered set of segments. […] The differences of arrangement often have a relation to the neighboring morphemes and to the social situation comparable to the relation which morphemic differences may have to the neighboring morphemes and social situation. In some cases differences in morphemes substitute for differences in arrangement.
- Harris (1951), a pag.185