| Class | notify_question_modified | Decorator that sends a ObjectModifiedEvent after a workflow action. |
| Class | Question | See IQuestion. |
| Class | QuestionSet | The set of questions in the Answer Tracker. |
| Class | QuestionSearch | Base object for searching questions. |
| Class | QuestionTargetSearch | Search questions in an IQuestionTarget context. |
| Class | SimilarQuestionsSearch | Search questions in a context using a similarity search algorithm. |
| Class | QuestionPersonSearch | Search questions which are related to a particular person. |
| Class | QuestionTargetMixin | Mixin class for IQuestionTarget. |