"The source of data for an object such as a cube or a dimension. Also, the specification of the information necessary to access source data. Sometimes refers to a DataSource object." (Microsoft Corporation, "SQL Server 7.0 System Administration Training Kit", 1999)
"A repository for storing data. An ODBC/JDBC term." (Peter Gulutzan & Trudy Pelzer, "SQL Performance Tuning", 2002)
"A file that contains the connection string that Analysis Services uses to connect to the database that hosts the data as well as any necessary authentication credentials." (Reed Jacobsen & Stacia Misner, "Microsoft SQL Server 2005 Analysis Services Step by Step", 2006)
"A system or application that generates data for use by another system or by an end user. The data source may also be the system of origin for the data." (Evan Levy & Jill Dyché, "Customer Data Integration", 2006)
"An information store that can be connected to by various SQL Server technologies such as SQL Server Reporting Services for data retrieval." (Marilyn Miller-White et al, "MCITP Administrator: Microsoft® SQL Server™ 2005 Optimization and Maintenance 70-444", 2007)
"An entity or group of entities from which data can be collected. The entities may be people, objects, or processes." (Jens Mende, "Data Flow Diagram Use to Plan Empirical Research Projects", 2009)
"An object containing information about the location of data. The data source leverages a connection string." (Jim Joseph et al, "Microsoft® SQL Server™ 2008 Reporting Services Unleashed", 2009)
"A repository of data to which a federated server can connect and then retrieve data by using wrappers. A data source can contain relational databases, XML files, Excel spreadsheets, table-structured files, or other objects. In a federated system, data sources seem to be a single collective database." (Sybase, "Open Server Server-Library/C Reference Manual", 2019)
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