For a long time, the general principle was that anything that was not expressly permitted was prohibited with regard to labelling. Today, the most important information about a wine is regulated in EU regulations with mandatory and optional information and listed under the heading of labelling.
There is also additional information that serves to provide a more detailed description and thus additional information over and above the basic information to be conveyed on the main label and is intended to fulfil the consumer's desire for greater differentiation and knowledge transfer.
They are not part of the standard wine law information such as bottler, producer, origin, vintage, nutritional value (calorific value, ingredients, allergens), quality group and grape variety, but supplement it and make it easier to understand. According to the "prohibition of misleading labelling", such information must be "true" and must not be "misleading".
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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)