Classification of wine

The classification of wine can be done according to various methods including place of origin or appellation, vinification methods and style,sweetness and vintage, or variety used. Practices vary in different countries and regions of origin, and many practices have varied over time. Some classifications enjoy official protection by being part of the wine law in their country of origin, while others have been created by, for example, grower's organizations without such protection.

Within the European Union, the term "wine" in English and in translation is reserved exclusively for the fermented juice of grapes.

Within the United States, wine may include the fermented juice of any fruit or agricultural product, provided that it is between 7% and 24% alcohol by volume and intended for non-industrial use. With the exceptions of cider, perry, and sake, such non-grape wines are to label themselves by the word "wine" qualified by a truthful description of the originating product: "honey wine", "dandelion wine", (blended) "fruit wine", etc.

Other jurisdictions have similar rules dictating the range of products qualifying as "wine".

Historically, wines have been known by names reflecting their origin, and sometimes style: Bordeaux, Port, Rioja, Mosel and Chianti are all legally defined names reflecting the traditional wines produced in the named region. These naming conventions or "appellations" (as they are known in France) dictate not only where the grapes in a wine were grown but also which grapes went into the wine and how they were vinified. The appellation system is strongest in the European Union, but a related system, the American Viticultural Area, restricts the use of certain regional labels in America, such as Napa Valley, Santa Barbara and Willamette Valley. The AVA designations do not restrict the type of grape used.

...
Wikipedia