| Module | answercontact | Answer contact interfaces. |
| Module | faq | Interface for FAQ document. |
| Module | faqcollection | Interface for things that contains a collection of FAQs. |
| Module | faqtarget | Interface for things that can host IFAQ. |
| Module | question | Interfaces for a Question. |
| Module | questioncollection | Interfaces for a Question. |
| Module | questionjob | Interface for the Jobs system for questions. |
| Module | questionmessage | Question message interface. |
| Module | questionreopening | Interface for a QuestionReopening. |
| Module | questionsperson | Undocumented |
| Module | questionsubscription | Question subscription interface. |
| Module | questiontarget | Interfaces for things which have Questions. |
| Module | webservice | All the interfaces that are exposed through the webservice. |