Explicit and Implicit Execution of REXX

After you have placed REXX instructions in a data set, you can run the exec
explicitly by using the EXEC command followed by the data set name

Explicit execution
= TSO EX ‘Q1.Q2.EXEC(HWORLD)’


or implicitly
by entering the member name. You can run an exec implicitly only if the PDS that
contains the exec was allocated to a system file (SYSEXEC OR SYSPROC) or it
is allocated to an application CLIST OR EXEC.


Implicit Execution
= TSO HWORLD