DOCs and IPR wines of Portugal
The Denominação de Origem Controlada (or DOC) Wine Classificatiions of Portugal
DOC is the system of protected designation of origin for wines, and also cheeses, butters, and other agricultural products from Portugal. it is a certificate of quality in that the wine has been made according to designated standards.
Portuguese wine regions established this system following Portugal's entry into the European Union in 1986. It is similar to the French Appellation d'origine contrôlée (AOC), the Italian Denominazione di origine controllata (DOC), and the Spanish Denominación de Origen (DO) systems.
In addition to protecting the place of origin, the DOC includes regulations aimed at maintaining the quality level of the wines associated with a particular wine region- Covering permitted grape varieties, regulating maximum crop yields at harvest, establishing minimum alcohol content, and periods of bottle or oak aging. Vineyards are required to submit finished wine samples to the regulating body to ensure compliance with the DOC standards.
Portugal Regional Wine Designations IPR -Indicação de Proveniencia Regulamentada Vinho Regional. IPRs are similar to DOC and indicate regions that have established their own regulating bodies but have not yet established an internationally recognizable identity for their wines. It is similar to the French Vin Délimité de Qualité Superieure (VDSQ) system.
VR -Vinho Regional Portugal is similar to the French Vin de pays and is a catchall classification for wines that do qualify under the DOC or IPR designations