Compulsory sensory and analytical test for quality wines or pedigree wines in Germany (this is not necessary for the two quality levels wine and country wine ). As proof that the test has been passed, the official test number is issued, which must be indicated on the label. From this, the inspection body, producer and vintage can be traced back without any doubt.
The wine may not be altered from the beginning of the application until the end of the procedure and from the time of issuance. However, this prohibition does not affect necessary precautions for normal wine care. These include sulphurisation, addition of ascorbic acid and metatartaric acid, and filtration (but not the various fining techniques).
For me, Lexicon from wein.plus is the most comprehensive and best source of information about wine currently available.Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)