Naxos Music LibraryNML is the world's largest online classical music library. The library offers the catalogs of more than 50 classical, jazz and world music labels with more labels joining every month. Among the labels whose catalogs are included in the service are leading independent classical labels such as BIS, Chandos, CPO, Haenssler, Hungaroton, Marco Polo, Vanguard Classics, VOX, and of course Naxos. World music content is provided by ARC, Celestial Harmonies and others.