Classes of technical documentation may include: Historically, most classes of technical documentation lacked universal conformity (standards) for format, content and structure.
[1] Technical product documentation not covered by ICS 01.110 are listed in the subsection below.
This includes e.g. information on the device specification, labelling and instructions, design and manufacture, safety and performance requirements, risk management, and the validatain and verfification of the device, including the clinical evaluation; and also information from postmarketing surveillance.
For example, the Diátaxis framework (which is mostly used in the field of software documentation [8]) posits four distinct documentation forms, corresponding to four different user needs: tutorials, how-to guides, reference and explanation.
[9] By contrast, DITA asserts five different "topic types": Task, Concept, Reference, Glossary Entry, and Troubleshooting, while RedHat's Modular Documentation system uses three "modules": Concept, Procedure and Reference.