MANDATORY Directive The MANDATORY directive marks a field as a mandatory field. This information will be reflected in the WSDL file, therefore this directive has effect only for for Web Services of type SOAP. . $ELK MANDATORY or *(( ELK MANDATORY )) or *>(( ELK MANDATORY )) Example Specify that p1 is a mandatory field. Linkage Section. 01 params. $ELK MANDATORY 03 p1 pic x(10).