Regulations govern the classification and sale of wine in various regions of the world. France has an appellation system which ranges from Vin de Table (or "table wine"), through Vin de Pays and Appellation d'Origine Contrôlée (AOC) to Appellation d'Origine Vin De Qualité Supérieure (AOVDQS) and which is based on the concept of terroir (or region of origin) and wine quality. Germany developed a similar system in 2002, though this has not yet developed the authority of the French system. Spain and Italy also have a classification which is based on a dual system of region of origin and quality of product. New World wine, that is wines from outside of the traditional wine growing regions of Europe, tend to be classified by grape rather than by quality or region of origin, though there have been subjective attempts to classify by quality, most successfully by Langton's.
Wines are usually named either by their grape variety or by their place of production. Generally speaking, European wines are named both after the place of production (e.g. Bordeaux, Rioja, Chianti) and the grapes used (e.g. Pinot, Chardonnay, Merlot). Wines from everywhere except Europe are generally named for the grape variety. More and more, however, market recognition of particular regions and wineries is leading to their increased prominence on non-European wine labels. Examples of recognized locales include: Napa Valley, Barossa Valley, Willamette Valley, Cafayate, Marlborough, Walla Walla, etc.
Some blended wine names are marketing terms, and the use of these names is governed by trademark or copyright law, rather than a specific wine law or a patent on the actual varietal blend or process used to achieve it. For example, Meritage (pronounced to rhyme with "heritage") is generally a Bordeaux-style blend of Cabernet Sauvignon and Merlot, and may also include Cabernet Franc, Petit Verdot, and Malbec, while the dôle is made from the Pinot Noir and Gamay grapes. Use of the term Meritage is protected by licensing agreements by The Meritage Association.
The taste of a wine depends not only on the grape species and varietal blend, but can also depend on the ground and climate (known as terroir) where it is cultivated. Historically, wines have been known by names reflecting their origin, and sometimes style: Bordeaux, 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.
In most of the world, wine labeled Champagne must be made from grapes grown in the Champagne region of France and fermented using a certain method, based on the international trademark agreements included in the 1919 Treaty of Versailles. However, in the United States, a legal definition called semi-generic has enabled U.S. winemakers to use certain generic terms (Champagne, Hock, Sherry, etc.) if there appears next to the term the actual appellation of origin.
More recently wine regions in countries with less stringent location protection laws such as the United States and Australia have joined with well-known European wine producing regions to sign the Napa Declaration to Protect Wine Place and Origin, commonly known as the Napa Declaration on Place. This is a "declaration of joint principles stating the importance of location to wine and the need to protect place names.". The Declaration was signed in July 2005 by four United States winegrowing regions and three European Union winegrowing regions.