Originally Posted by Mort Sobite
Trocken just means it's vinified dry like an Alsatian wine.
Petrus, let me quickly explain something to you. Alsace is a region, not a "wine." This might cause confusion for a wine neophyte, so let me make it simple: the region produces a number of wines, some with noticeable residual sugar content, including the two late harvest classifications, Vendange Tardive (VT) and SÃ©lection de Grains Nobles (SGN).
I hope this clears up your confusion although I can certainly see how it can happen to someone just starting out their knowledge in wine.