Understanding Accessibility
by Vivienne Trulock
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Guideline 11. Use W3C technologies and guidelines.
Checkpoint 11.1 - Use W3C technologies when they are available and appropriate for a task and use the latest versions when supported
Web authors are urged to use the latest technology specification on the grounds that there is more support for assistive technologies, for example HTML 4.01 is preferred over earlier HTML versions. CSS2 is also preferred over CSS1. Unfortunately, the list of W3 technologies is enormous and it is impractical to exhaustively check each page against this.
How do I do it?
Use the latest technologies and specifications where possible.
How do I check that it meets the WCAG criteria?
However, where the doctype of the page is defined (as assessed in Guideline 3.2), and where the doctype is not HTML 4.01, XHTML 1.1 or XML 1 it will be deemed to have failed the check. These can also be checked using the html validator (for HTML and XHTML) and the xml validator (for xml).
Whether a style sheet is CSS1 or CSS2 can be ascertained using the CSS validator. Pages using CSS1 or having no style sheet will be deemed to have failed the check.
