You should be familiar with several terms used in discussions of PL/I error and condition handling. The terms are listed below:
.-----------------
| (SIZE):B:PROC;
| ON ERROR SNAP;
| .
| .
|
| CALL C;
| .--------
| | C:PROC;
| |
| | END C;
| '--------
| CALL D;
| END B;
'------------------
.--------- .---------
| D:PROC; | E:PROC;
| . |
| . |
| |
| CALL E; |
| END D; | END E;
'--------- '---------