You can request the extender UDFs in a DB2 application program, or you can request them interactively using the DB2 command-line processor.
The extenders also provide the following application programming interfaces (APIs):
The DB2 extenders also provide a command-line processor that you use to issue administrative commands. To differentiate the command-line processor provided by the extenders from the command-line processor provided by DB2, we'll refer to the former as the "db2ext command-line processor" and the latter as the "DB2 command-line processor".