identifier-4

Represents the pointer field, which points to a character position in the receiving field.

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.

X When identifier-3 (the receiving field) is a DBCS data item,
X identifier-4 indicates the relative DBCS character position (not the
X relative byte position) in the receiving field.

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