| Symbol | Meaning |
|---|---|
|
| Pre-requisite |
|
| Post-requisite |
|
| In parameter |
|
| Out parameter |
|
| In/out parameter |
|
| Resource acquisition |
|
| Resource use |
|
| Sequential step |
|
| Parallel step |
|
| Choice step |
|
| Try step |
| E | Exception |
|
| Handler |
|
| Rethrow |
|
| Continue |
|
| Restart |
|
| Complete |