The wine encyclopaedia 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 around 3,100 grape varieties, over 2,000 wineries, well over 10,000 different vineyard, wine and vinification terms, around 100 wine-growing countries with their wine-growing history, wine-growing regions, grape varieties, wineries and wines, over 600 biographies of famous wine-growing personalities as well as all important wine-legislative issues. In the period from 1999, when it contained around 800 keywords, to the present day, it has grown by a factor of around 30. The encyclopaedia is a "living" work, because it constantly takes into account comments from users, adapting it to their needs.