Once you have declared a WEBROUTINE, you can map its incoming and outgoing fields and lists by using the WEB_MAP statement. A WEBROUTINE can have multiple WEB_MAP statements.
In addition to specifying WEB_MAPs inside WEBROUTINE blocks, you are allowed to declare WEB_MAPs inside a BEGIN_COM block of a WAM. This technique allows you to map fields and lists into every WEBROUTINE in your WAM without having to explicitly define WEB_MAPS in each WEBROUTINE.
Also See
Required
WEB_MAP ------ FOR -------*INPUT ----------------------------->
*OUTPUT
*BOTH
*NONE
>---FIELDS----- field names attributes----------->
list name
-------------------------------------------------------------------
Optional
>-- OPTIONS ---- *PERSISTS ------------------------->
