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See here for more information about Generator Operators.
| Expression | Attribute | Description | 
|---|---|---|
| 
                       | 
                      Not predicate. Ensure that  | |
| 
                       | 
                      And predicate. Ensure that  | |
| 
                       | 
                      Optional. Generate  | |
| 
                       | 
                      Kleene. Generate  | |
| 
                       | 
                      Plus. Generate  | |
| 
                       | 
                      Alternative. Generate  | |
| 
                       | 
                      Sequence. Generate  | |
| 
                       | 
                      List. Generate  | 
For more information about the attribute propagation rules implemented by the compound generators please see Generator Compound Attribute Rules.