Allmusic

AllMusic, formerly known as the All Music Guide or AMG, is a database with information about music and owned by All Media Guide . The All Music Guide was founded in 1991 by Michael Erlewine with the aim to create a music guide for consumers. The first guide was published in 1992. The database is widely used in retail outlets in CD and record stores and online shops that sell music.

The database is composed of:

The contents of AllMusic is composed by a professional staff that provides the data entry and substantive matter. There are more than 900 music critics involved in reviewing albums and writing biographies. The website of advertising banners provided.
 * Based Metadata: names, genres, credits, copyright information, product numbers, etc.
 * descriptive content: tones, moods, etc.
 * Relational content: similar artists and albums, influences, etc.
 * Editorial content: biographies, reviews, charts, etc.