SAS(R) 9.1.3 Companion for z/OS

System Options under z/OS FILEEXT= System Option 433
IGNORE
ignores the part of the name after the period and specifies that only the part before
the period is to be used.
INVALID
disallows any member name with an extension.
ASIS
accepts the member name as it is. These member names must conform to the
naming conventions of partitioned data sets.
Details
For compatibility with SAS on other platforms, the FILEEXT= system option enables
you to write portable SAS programs that will run on systems that support file
extensions and on systems that do not support file extensions.
Portable SAS programs can access external files with file extensions when you run
those programs in environments such as Windows and UNIX. When you run those
programs in z/OS, and when the program accesses members in partitioned data sets,
the value of FILEEXT= determines how the file extensions are interpreted.
Member names in partitioned data sets must consist of one to eight alphanumeric
characters starting with a letter or with one of the following national characters: $, #, @.
A member name extension is an optional part of the member name that follows a period.
Example of FILEEXT=VERIFY
In this example, SAS verifies that the part of the name that follows the period
corresponds to the last level of the partitioned data set name. If it does not, an error
message is written to the SAS log:
options fileext=verify;
/* allocate a PDS */
filename out2 ’myid.fileext.sas’ disp=old;
data _null_;
/* the member name is ’versas’*/
file out2(versas.sas);
put ’text’;
run;
Example of FILEEXT=IGNORE
Using the IGNORE value causes the extension, if present, to be ignored:
options fileext=ignore;
/* allocate a PDS */
filename out2 ’myid.fileext.testsrc’ disp=old;
data _null_;
/* the member name is ’dotnd’ */
file out2(dotnd.some);
put ’text’;
run;