Haugen’s model (1972 [1966]) of standardisation has been widely adopted in general histories of particular languages, not least because of its clarity and simplicity. In this article, I focus on its treatment of codification, with a view to suggesting refinements to this part of the model. In particular, I discuss the relationship between codification and prescription on the one hand, and between prescriptivism and purism on the other. Haugen makes no distinction between codification and prescription either in the original version of his model (Haugen 1972 [1966]), or in its revised version (Haugen 1987). Indeed, he seems to consider codification and prescription as broadly interchangeable, suggesting that the typical products of codificati...