It must be an elementary integer data item large enough to contain a value equal to the length of the receiving area plus 1. The pointer field must not contain the symbol P in its PICTURE character-string.
+-------------------------------IBM Extension--------------------------------+
When identifier-3 is a DBCS data item, identifier-4 indicates the relative DBCS character position in the receiving field.
+----------------------------End of IBM Extension----------------------------+
(C) Copyright IBM Corporation 1992, 2006. All Rights Reserved.