Specifies, for spooled files only, some user-specified data that identifies
the file.
The possible values are:
- *SOURCE
- If the spooled file was created by an application program, the name of the
program is used. Otherwise, blanks are used.
- user defined
- You can specify up to 255 characters of text, enclosed in apostrophes in
this field.
- *CMDDFT
- The system default is used.
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