Understanding Conformance includes further explanation of the accessibility-supported concept. 5.1 Interpreting Normative Requirements The main content of WCAG 2.2 is normative and defines requirements that impact conformance claims. Introductory material, appendices,
               sections marked as "non-normative", diagrams, examples, and notes are informative (non-normative). Non-normative material provides advisory information to help interpret
               the guidelines but does not create requirements that impact a conformance claim. The key words MAY , MUST , MUST NOT , NOT RECOMMENDED , RECOMMENDED , SHOULD , and SHOULD NOT are to be interpreted as described in [ RFC2119 ].