In WSS3.0 and MOSS2007 the accessibility standards are not met. This typically increases the time for a Internet facing web site from being implemented in MOSS2007.
For more information on accessibility in WSS3.0 and MOSS2007 please check the SharePoint Accessibility wiki page.
"I've heard a lot of people inside and outside of the SharePoint Conference talking about WCAG, Cross-Browser, and XHTML in SharePoint 2010. From what I can tell these things are all true for SharePoint 2010:
- WCAG 2 Compliant for accessibility needs
- More cross browser friendly than before
- Mostly table-less layout
- Out of the box master pages will be based on the XHTML Strict DocType
Now for what I don't think will be true in SharePoint 2010
To confirm Randy's statement Andrew Connell
also goes on to state that it will not be W3C Compliant markup.
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