PL/I examples

DECLARE  SERVICE CHAR(8) INIT('TBOPEN  '),
         TABLE   CHAR(8) INIT('XTABLE  '),
         OPTION  CHAR(8) INIT('NOWRITE ');
         ⋮
CALL  ISPLINK (SERVICE, TABLE, OPTION);

 
DECLARE  SERVICE CHAR(8) INIT('LMOPEN  '),
         DATAID  CHAR(8),
         OPTION  CHAR(8) INIT('INPUT   ');
          ⋮
CALL  ISPLINK (SERVICE, DATAID, OPTION);

For service calls in PL/I, you can use literals in assignment statements to initialize parameter values, as in:

SERVICE='LMOPEN  ';