| Function | milestone_sort_key | Enable sorting by the Milestone dateexpected and name. |
| Class | HasMilestonesMixin | No class docstring; 3/4 methods documented |
| Class | MultipleProductReleases | Raised when a second ProductRelease is created for a milestone. |
| Class | InvalidTags | Raised when tags are invalid. |
| Class | MilestoneData | No class docstring; 3/5 methods documented |
| Class | Milestone | No class docstring; 13/15 methods documented |
| Class | MilestoneSet | No class docstring; 6/6 methods documented |
| Class | ProjectMilestone | A virtual milestone implementation for project. |