Chris Keane wrote: > The http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd requires an alt > attribute for images, and the HTML DTD shows a similar requirement:
My understanding follow. I write this from the perspective of having just done an XHTML/accessibility/usability anal probe on a new .gov.au site we're about to launch.
All img tags require an alt attribute for valid XHTML. However, the value for the alt attribute may be empty for visual elements having no value other than to provide visual layout - for example, spacer images.
I am fairly certain that W3C recommendations in this area follow this line. For my employer, where I am the web app development team leader (Federal government department), as well as standards Nazi, we have a requirement to meet all Priority 1 and choose to meet where possible, all Priority 2 and 3 requirements.
Steve
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