Execute edited data directly, no need to save first.

How it works:

 The data  edited is  copied to  a temporary  pds member,  then the
 temporary dataset plus the base dataset are ALTLIBd and LIBDEFd to
 ISPPLIB,  ISPMLIB, ISPSLIB  and ISPTLIB.  This allows  part of  an
 application to  be tested, even  when the  base dataset is  not in
 your ISPxLIB / SYSEXEC concatenations.
 RUN  then analyzes  the edited  data to  determine the  data type.
 ISPF display-  and select  panels, ISPF  skeletons, TSO  CLIST and
 REXX are detected.

Advanced features.

 While you  cannot use ISPF  functions in  a skeleton, you  can use
 all TSO features. This  lets you create a sketon to  be used for a
 variable number of data lines, as demo-d in the example below. The
 beauty of  this is  that you  can duplicate  'queue' lines  as may
 times as needed, then issue the RUN command to build your job, and
 just CANCEL  the edit session afterwards to leave the  base member
 intact.

Sample

)CM Create a list of datasets to LISTCAT
)REXX DSNN
 queue 'SYS1.MACLIB'                                              '
 queue 'SYS1.MODGEN'                                              '
 dsnn=queued()
)ENDREXX

)CM Use the list to build a LISTCAT job
//L        EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
)DO N = 1 TO &DSNN
)REXX DSN
 pull dsn
 dsn=space(dsn)
)ENDREXX
 LISTCAT ENT(&DSN)
)ENDDO