Issue 30 Change Proposal: <a longdesc=link >

Summary

Extend @longdesc anchor and area elements. Examples:

1) <a longdesc=link ><img src=* alt=text ></a>
2) <a href=BLINK longdesc=link ><img src=* alt=text ></a>
3) <img src=* alt=text usemap=m >
   <map name=m ><area shape=default longdesc=link ></map>
4) <img src=* alt=text usemap=m >
   <map name=m ><area shape=default href=BLINK longdesc=link ></map>
5) <a longdesc=link ><table /></a>

Rationale

• allow authors to build on their knowledge about anchor and area elements when creating longdesc links.
• permit creatition of specific longdesc link texts: <area alt=longdescLinkText longdesc=link>
• add opportunity to add longdesc links also to other elements than the IMG element

Details

A set of edit instructions, specific enough that they can be applied without ambiguity:

• Add @longdesc to AREA and A, the same way it has been added to IMG (Again, this CP incorporporates Include Londesc in HTML5.)
• Describe how to use <a longdesc=link> and <a longdesc=link href=BLINK >
• Describe how <area longdesc="" coords=* shape=* > can be used to add a long description to a specific part of an image.
• Give rules for how to handle duplicate @longdesc values: <a longdesc=link><img longdesc=link></a>. The rule should be that this is forbidden.
• Point out that <area> and <a> are interactive elements even if they only contain the @longdesc attribute.

Impact

Positive Effects

• Advantages

Negative Effects

• List disadvantages

Conformance Classes Changes

Describe what conformance classes will have to change.

Risks

Describe any risks.

References

• List references