rel-longdesc
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Proposed by John Foliot in a comment on Bruce Lawson's blog.
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The longdesc microformat, as described in W3 bug 10434
Bug 10434 against HTML5, describes how rel="longdesc" could be used to improve the advice found in WCAG 2.0’s Technique G73. Hopefully the ideas expressed that bug, will be taken into this microformat.
Here is summary of what that bug says: rel="longdesc" allows authors to not only use adjacent links as description links (adjacent links are the only links which WCAG20/G73 suggests being used as description links). rel="longdesc", in contrast, would permit authors to also use all other link kinds: image maps, placing a link in the fallback of an object element or even — voila! — permit authors to wrap the embedded object in a link. (Can you believe it: WCAG 2.0 does not seem to mention that one can wrap the embedded object in a link element!) With a rel="longdesc" link, one should not even need to use 1 pixel wide images as a way to hide description links (yes, hiding links in "a small image" is in fact something which G73 suggestes.)