Description

TODO: Explain ordinalization and ordinalizers here.

Limitations

TODO: Be sure to note the highly restrictive assumptions made about ordinalizer functions, especially as noted e.g. in connection with the internal function G (defined in 'exact.R').

Validity

The validity of an ordinalizer might well be programmatically testable. If so, all this discussion might well be carried out in documentation for a validity-testing function.