| Interface | Description | 
|---|---|
| Operation | Manipulates a PDF file | 
| Class | Description | 
|---|---|
| OperationAttach | Attaches one or more files to a PDF document | 
| OperationCommon | |
| OperationInspect | 
| Exception | Description | 
|---|---|
| OperationException | This exception is thrown by  Operation.execute(Namespace)to notifyMain.main(String[])that the operation has
 encountered a condition it cannot recover from. | 
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