|Austrian Folk Dancing||http://www.fff.at/fff/dance/folklore/index.html|
I am not specialized in this field, however, I can give you some hints. The pages of Peter Schneeweis are the recommended entrypoint if you are looking for information about International Folk Dancing in Austria, especially his page about the dancing groups which includes international folk dancing as well.
Additionally you'll find some hints on the Austrian Dance Server by Rudolf Lidmila.
Das ist aber keine offizielle Definition, sondern nur meine persönliche Beobachtung. Bei Bedarf bitte die Experten zu kontaktieren.