A canonical prototype is an abstract prototype constructed from a standardized set of abstract components. Canonical abstract components model function, size, and position within interaction contexts, but not appearance or detailed behavior. The canonical set covers the full range of abstract user interface functions, such as holding information, accepting user input, or starting a process. With the size and position of canonical components represented in the abstract prototype, canonical prototypes are intermediate between simple content models and realistic or representational paper prototypes. For more information, see the paper on canonical prototypes.