The example sentence below is an excerpt from M. A. K. Halliday's Linguistics as Metaphor:
[...] each discipline has tended to fragment into separate "branches"; linguistics, apart from its traditional split into historical and descriptive, held together until fairly late, but it too has now become a collection of specializations.
Since there is no information on this kind of usage in the into entry in OED, this seems to me like an omission (of the word linguistics) for good reason, so I searched Linggle:
Firms are divided into large and small based on median total assets.
The result would be a two-tiered society divided into rich and poor.
A division of the world into left and right that is equally inapplicable to the past and to the present deserves to be discarded.
I think we could divide up the section 502 money into new and existing, using 60 percent for ...
Sensations are commonly classified into internal and external, but the meaning given to internal sensations today is not the same as formerly.
And there are some sentences with adjectives that are more frequently used as nouns even without a preceding "the", about which I'm less certain that they are in the same vein with the initial example:
In the four-field matrix, the intensity of cooperation and competition is divided into low and high, while in the nine-field matrix is split into low, medium, and high.
The sonnets differ in that the focus turns in the first poem to individual reactions to death, dividing people into good and bad.
Is this kind of usages naive omissions for brevity's sake, or is it under a particular grammatical category of its own right?