Figure 1 shows a sample ISPXDT definition that defines exit routines for installation-wide exits 2 and 12.

<<ISPMXED<START
<*
<<ISPMXLST<(2,12)
<*
<<ISPMXDEF<2
<<ISPMEPT<MYEXT021,MYAREA01
<<ISPMEPT<MYEXT022,MYAREA02
<<ISPMEPT<MYEXT023,MYAREA02
<<ISPMXEND
<*
<<ISPMXDEF<12
<<ISPMEPT<MYEXT121,MYAREA03
<<ISPMEPT<MYEXT122,MYAREA01
<<ISPMEPT<MYEXT123
<<ISPMEPT<MYEXT124,MYAREA02
<<ISPMXEND
<*
<<ISPMXED<END
<*
<<ISPMXDD<START
<*
<<ISPMDAD<MYAREA01,1024
<<ISPMDAD<MYAREA02,2048
<<ISPMDAD<MYAREA03,256
<*
<<ISPMXDD<END

At user exit 2, exit routines with entry points MYEXT021, MYEXT022, and MYEXT023 are called, in that order.

At user exit 12, exit routines with entry points MYEXT121, MYEXT122, MYEXT123, and MYEXT124 are called, in that order.

MYAREA01 (1024 bytes) is used by exit routines at MYEXT021 and MYEXT122.

MYAREA02 (2048 bytes) is used by exit routines at MYEXT022, MYEXT023, and MYEXT124.

MYAREA03 (256 bytes) is used by the exit routine at MYEXT121.

Exit routine MYEXT123 does not require a data area.