non-normative - MDN Web Docs Glossary: Definitions of Web-related terms 编辑

Software specifications often contains information marked as  non-normative or informative, which means that those are provided there for the purpose of helping the readers to understand the specification better or to show an example or a best practice, and not needed to be followed as a rule. Sections that contain official part of the specification that must be followed are often marked as normative.

Learn more

• Description of normative and informative content in WHATWG wiki