XREF STATEMENT CLASS CODES:
 
AS	ASSIGN
CA	ARGUMENT IN CALL STATEMENT
CM	COMMON VARIABLE
DA	DATA
DF	DEFINE FILE
DI	DIMENSION
DO	DO
DT	BYTE, COMPLEX, DOUBLE PRECISION, INTEGER, LOGICAL, REAL
ED	ENCODE, DECODE
EN	ENTRY
EQ	EQUIVALENCE, PAUSE, RETURN, STOP
GO	GO TO
ID	CLOSE, OPEN
IF	IF
IN	INCLUDE
IO	ACCEPT, PRINT, READ, TYPE, WRITE
IU	BAKSPACE, ENDFILE, FIND, REWIND
PD	BLOCKDATA, FUNCTION, PROGRAM, SUBROUTINE
PM	PARMETER
PS	COMMON BLOCK NAME
XP	SUBPROGRAM NAME
=	STORED INTO BY REPLACEMENT STATEMENT
@	STATEMENT LABEL DEFINITION