Concept, task and reference topics contain different types of content. Concept topics contain explanations, task topics contain procedural steps, and reference topics contain tabular look-up information.
An important skill of an author working in a DITA environment is typing information correctly into information types.
Of the three base DITA information types:
- Concept topics are used for overviews of tasks or overviews of reference information. They tend to be short and simple.
- Task topics contain procedural steps.
- Reference topics detail properties and other reference (as opposed to narrative) information, typically in tabular form.
- "Alarm systems" (concept)
- "Setting the alarm" (task)
- "Alarm codes" (reference)
Such a set of topics would be associated using a reltable, so that the topics would be linked or associated in the deliverable document. A typical procedure will require a concept topic and a task topic, and may require a reference topic.
While task information is generally easy to identify, it can be difficult to distinguish concept from reference information. Table 1 explains some of the characteristics of concept topics compared with reference topics.
| Concept | Reference | |
|---|---|---|
| Purpose/Function | Explanatory | Fact |
| Access Frequency | A few times | Repeatedly, when needed |
| Book Context | Front, Middle | Back |
| Content or Data | Content | Data |