In Austria, they call their appellations DAC (Districtus Austriae Controllatus). The newest and ninth DAC has just been approved: Wiener Gemischter Satz. It is a strange appellation, or at least unusual appellation, perhaps even unique. The rules stipulate that the vineyard must be planted with at least three different varieties (i.e. a field blend).
To be precise: the grape varieties must be mixed in one and the same vineyard. In other words, it is not just the wine that must be a blend, it is also the planting the vineyard. The wine should always be dry and must not have a prominent oak character.
Learn more about this new DAC on Austrian Wine.