The Ausbausprache reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Ausbausprache

An Ausbausprache (also called an ausbau language) is a language which has a standard spelling, a standard grammar and a relatively wide and clear vocabulary (and is thus almost identical with a standard language). Two language forms that allow easy mutual communication can nevertheless be regarded as two different languages if they are each an Ausbausprache according to this definition. Good examples are Serbian and Croatian, Dutch and Afrikaans and to some some extent Hindi and Urdu. See also Abstandsprache.