Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide

Using a connection string

If your application requires a connection string to connect to a data source, you must specify the data source name that tells the driver which ODBC.INI section to use for the default connection information. Optionally, you may specify attribute=value pairs in the connection string to override the default values stored in ODBC.INI. These values are not written to ODBC.INI.

You can specify either long or short names in the connection string. The connection string has the form:

 DSN=data_source_name[;attribute=value[;attribute=value]...]

An example of a connection string for INFORMIX 5 is

 DSN=INFORMIX TABLES;DB=PAYROLL
Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide