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[[Internet|In]] [[computing]], a '''data source name''' ('''DSN''', sometimes known as a '''database source name''', though "[[Computer file|data sources]]" can comprise other repositories apart from [[database management system|databases]]) is a string that has an associated [[data structure]] used to describe a connection to a data source. Most commonly used in connection with [[ODBC]], DSNs also exist for [[JDBC]] and for other data access mechanisms. The term often overlaps with "[[connection string]]". Most systems do not make a distinction between DSNs or connection strings and the term can often be used interchangeably<ref>[https://www.gridgain.com/docs/latest/developers-guide/SQL/ODBC/connection-string-dsn Connection String and DSN]</ref>.
DSN attributes may include, but are not limited to<ref>[https://docs.microsoft.com/en-us/sql/connect/odbc/dsn-connection-string-attribute?view=sql-server-ver15 ODBC DSN connection strings]</ref>:
* the name of the data source
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