| Class | Description | 
|---|---|
| PgeMetadata | A wrapper class to act as a facade interface to all the different
  Metadatasources given to a PGE. | 
| Enum | Description | 
|---|---|
| PgeMetadata.Type | |
| PgeTaskMetKeys | PGETaskInstance Reserved Metadata keys. | 
| PgeTaskStatus | Workflow Statuses for  PGETaskInstance. | 
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