| Class | DistroSeriesDifferenceNavigation | No class docstring; 3/4 methods documented |
| Interface | IDistroSeriesDifferenceForm | An interface used in the browser only for displaying form elements. |
| Class | DistroSeriesDifferenceView | No class docstring; 13/13 methods documented |
| Interface | IDistroSeriesDifferenceDisplayComment | Marker interface. |
| Class | DistroSeriesDifferenceDisplayComment | Used simply to provide IComment for rendering. |
| Function | get_message | Adapter from IDistroSeriesDifferenceDisplayComment to IMessage. |
| Class | CommentXHTMLRepresentation | Render individual comments when requested via the API. |