The wine lexicon of wein.plus is the world's largest online knowledge database on wine. It consists of keywords (terms) and entries (texts) that explain these keywords. It contains descriptions of about 1,700 grape varieties, over 2,000 wineries, well over 10,000 different vineyard, wine and vinification terms, about 100 wine-growing countries with their viticultural history, wine-growing regions, grape varieties, wineries and wines, over 600 biographies of famous winemakers as well as all important wine law issues. In the period from 1999 with about 800 keywords at that time until today it has grown about 30 times. The encyclopaedia is a "living" work, as it constantly takes into account the advice of users, adapting it to their needs.