| Name | Description | |
|---|---|---|
 | Command | The incoming command |
| Errors | List of errors found in an incoming request |
| Operation | The normalised operation currently requested |
| PresentationContextId | The Presentation Context ID used to transmit this operation |
| Request | The incoming request |
| RequestAssociation | The Association which contains the Query |
| ResultDataSet | Specifies the result DicomDataSet to be sent back for Normalised operations operations for for failures for retrieval operations |
| Status | The status to be sent back as a C-Echo response |