Apache CouchDB, commonly referred to as CouchDB, is an open source database that focuses on ease of use and on being "a database that completely embraces the web". It is a NoSQL database that uses JSON to store data, JavaScript? as its query language using MapReduce?, and HTTP for an API. One of its distinguishing features is multi-master replication. CouchDB was first released in 2005 and later became an Apache project in 2008.


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