)F REXX Write pipe to dataset

 PIPE subroutine, write to dataset.

 If  the  dataset  do  not  exist,  it  will  be  created  using  the
 allocation  parms  or  values  derived  from  analyzing  the  input.

 Syntax  PIPE2DS [>|>>] dataset alloc-parms [RTNV]|[RTDDN]
   >|>> write or append, default is > (write).
   Dataset is  the name of the  new or existing dataset  to write to.
   The dataset can be a temporary name like &&TEMP. To access such a
   dataset afterwards, you must use the RTDDN parameter (see below).
   Allocation  parms are  the same  as  for the  BPXWDYN program,  so
   things   like  'LIKE(datasetname)   CYL   SPACE(1,1)'  is   valid.
   RTNV returns the generated allocation parameter plus RTDSN(dataset)
   and RTDDN(ddname).
   RTDDN will return the ddname for a temporary dataset, to be used
   like this:
     "PIPE stem data. | pipe2ds &&temp rtddn | var dd"
     "PIPE stem data2. | >> ddname="dd
      . . .
     "PIPE TSO FREE DD("dd")"
   TRKS may be used instead of TRACKS
   LRECL(*) will for RECFM V and set lrecl = length of widest record+4.