Home Learn DOCa (Denominacin de origen calificada) Decanter Staff November 11, 2010 The highest quality wine designation in Spain. Rioja was the first DO to be promoted. Written by Latest Wine News Rathfinny Wine Estate releases UK’s first 50cl sparkling wine Pernod Ricard to acquire 280-hectare Provence estate Researchers identify the cause of rotten egg smell in canned wine