The routine returns a logical flag indicating if the first supplied NDF is contained within an extension of the second supplied NDF. The search is recursive, so for instance a true value will be returned if the second supplied NDF is contained within an extension of an intermediate NDF that is contained within an extension of the first supplied NDF.

CALL NDF_ISIN( INDF1, INDF2, ISIN, STATUS )

INDF1 = INTEGER (Given)

INDF2 = INTEGER (Given)

ISIN = LOGICAL (Returned)

STATUS = INTEGER (Given and Returned)

• A .TRUE. value is returned if the two supplied NDF identifiers refer to the same base NDF.

• If an identifier for an NDF section is supplied to this routine, then the search will be applied to the associated base NDF.

• If this routine is called with STATUS set, then a value of .FALSE. will be returned for the ISIN argument, although no further processing will occur. The same value will also be returned if the routine should fail for any reason.