HIDDEN Directive This directive allows a field to be marked as hidden. This will avoid the need to convert a field into a service field. $ELK HIDDEN or *(( ELK HIDDEN )) or *>(( ELK HIDDEN )) Example The field p1 will not be available in the web service: Linkage Section. 01 params. $ELK HIDDEN 03 p1 pic x(10). 03 p2 pic x(10).