9.1: General (informative)
Requirements in clause 9 apply to web pages (as defined in clause 3.1) including:
- documents that are web pages;
- documents that are embedded in web pages and that are used in the rendering or that are intended to be rendered together with the web page in which they are embedded;
- software that is a web page;
- software that is embedded in web pages and that is used in the rendering or that is intended to be rendered together with the web page in which it is embedded.
Requirements for other documents and software are provided in clauses 10 and 11 respectively.
When evaluating web sites they are evaluated as individual web pages. Web applications, mobile web applications etc. are covered under the definition of web page which is quite broad and covers all web content types.
The web content requirements in clause 9.2 set out all of the Level A and Level AA Success Criteria from the W3C Web Content Accessibility Guidelines (WCAG 2.0) . The WCAG 2.0 conformance requirements are contained in clause 9.3. Annex A contains a copy of Web Content Accessibility Guidelines (WCAG 2.0).
Only web pages that conform to all of the web content requirements of clause 9.2 and the conformance requirements of clause 9.3 will conform to WCAG 2.0 Level AA.
Web pages that conform to WCAG 2.0 Level AA are deemed to have met the web content requirements of clause 9.2 and the conformance requirements of clause 9.3.
WCAG 2.0 is identical to ISO/IEC 40500 (2012): "Information technology - W3C Web Content Accessibility Guidelines (WCAG) 2.0".
The requirements in clause 9.2 are written using the concept of satisfying success criteria (defined in clause 3.1). A web page satisfies a WCAG success criterion when the success criterion does not evaluate to false when applied to the web page. This implies that if the success criterion puts conditions on a specific feature and that specific feature does not occur in the web page, then the web page satisfies the success criterion.
For example, a web page that does not contain pre-recorded audio content in synchronized media will automatically satisfy WCAG success criterion 1.2.2 (captions – pre-recorded) and, in consequence, will also conform to clause 9.2.3.
Clause 9.1 is informative only and contains no requirements requiring test.