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arangodb/Documentation/Manual/GlossaryDatabaseName.md

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DatabaseName

@GE{Database Name}: ArangoDB can handle multiple databases in parallel in the same server instance. When multiple databases are used, each database must be given a unique name. This name is used to uniquely identify a database. The default database in ArangoDB is named _system. The _system database will always be there, and cannot be dropped. When ArangoDB is accessed and no database name is explicitly specified, ArangoDB will automatically assume the default database _system is accessed. This is done for downwards-compatibility reasons.

The database name is a string consisting of only lower-case letters, digits and the _ (underscore) and - (dash) characters. User-defined database names must always start with a letter. Please refer to @ref NamingConventions for more information on valid database names.