CouchDB
databaseThis item was not updated in last three versions of the Radar. Nevertheless, it remains pertinent.
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Apache CouchDB is an open-source document-oriented NoSQL database. It uses multiple formats and protocols to store, transfer, and process its data. It uses JSON to store data, JavaScript as its query language using MapReduce, and HTTP for an API.
CouchDB is the primary database for the CHT. The CHT has a range of CouchDB databases for storing different types of data.