A string based identifier used to identify
an ODBC accessible database item (Table, View, Stored Procedure).
Basically, this is an X.509 Distinguished Name (DN). This kind of Data Source Name
has its ODBC Data Connection attributes (database connection information)
stored to a host operating system file, subject to host operating system
resource access controls. Note, this kind of data source name also enables you
share ODBC connection information across mounted drives (e.g., Dropbox, Amazon S3,
Google Drive, Microsoft OneDrive, Box., Rackspace, and others).