How Do We Interpret This ?

ksh $ETL_XXX/bin/filename.ksh wf_workflowname .
Which is used in post session command.

Using the korn shell (ksh) it runs a script called filename.ksh
The first part of the script name is a variable - $ETL_XXX that points to a path.
wf_workflowname is a parameter to the script.

Thank you . I think you are right..