| Association Type | Categorize associations by a type. | doctype |
| Category Type | Categorize categories by a type. | doctype |
| Charter Type | Categorize charters by a type. | doctype |
| Excerpt Type | Categorize excerpts by a type. | doctype |
| Experience Level | Defines the context through which readers acquire skills. The level sets the expectation on the author's techniques to teach. | doctype |
| Experience Level Type | Categorize experience levels by a type. | doctype |
| FAQ Type | Categorize FAQs by a type. | doctype |
| Generic Type | Categorize generic documents by a type. | doctype |
| Glossary Item Type | Categorize glossary items by a type. | doctype |
| Media Type | Resources are identified by their media type. This may be the MIME type, but also a human readable string, that identifies the syntactic format. | doctype |
| Media Type Type | Categorize media types by their type. | doctype |
| Metadata Type | Categorize metadata documents by a type. | doctype |
| Module Type | Categorization of document modules for single sourcing. | doctype |
| Organization Type | Categorize organizations by a type. | doctype |
| Person Type | Categorize persons by a type. | doctype |
| Profile Type | Categorize profiles by a type. | doctype |
| Quote Type | Categorize quotes by a type. | doctype |
| Relation | Organizes glossary items. | doctype |
| Relation Type | Categorize relations by a type. | doctype |
| Resource Type | Resources are identified by their type. This is not the MIME type, but human readable string, that identifies the semantic, rather than the syntactic format. | doctype |
| Role Type | Categorize roles by a type. | doctype |
| Section Type | Categorize sections by a type. | doctype |
| Space Index Type | Categorize space indexes by a type. | doctype |
| Stakeholder Type | Categorize stakeholders by a type. | doctype |
| Step Type | Categorize steps by a type. | doctype |
| Subject Type | Categorize subjects by a type. | doctype |
| Tag Type | Categorize tags by a type. | doctype |
| Topic Type | A topic type is a semantic type of the topic. It helps to set the expectations of potential readers. | doctype |
| Version Type | Categorize versions by a type. | doctype |
