Information typing is the architectural basis of topic-based authoring, and the practice of identifying types of topics that contain distinct kinds of information, such as concepts, tasks, and reference information. Topics that answer different kinds of questions can be categorized as different information types.
Classifying information by type helps authors:
Information typing is part of the general authoring approach called structured writing, which is used across the technical authoring industry to improve information quality. It is based on extensive research and experience, for example Robert Horn's Information Mapping.
The core information types in DITA are concept, task, and reference topic.