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A system variable that contains the descriptor code(s) assigned to the current message, in &MASKCHK format.
The descriptor code(s) that is assigned to a message are in the range from 1 to 16. This is a sixteen-byte system variable containing sixteen Y/N values representing the descriptor code(s).
For example, a WTO macro with DESC=(3,7,9) would yield a sixteen-byte value of NNYNNNYNYNNNNNNN.
Example: &AOMDMASK
& NRD = &MASKCHK **Y***Y*Y******* &AOMDMASK
Note: &AOMDMASK provides easy access to message descriptor code(s) via NCL.
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