MapML
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Need to specify how map-a links are accessible to screenreaders
Currently the text content of a map-a tag is the geometry value for a feature, or some part of it. This is great for sighted users, but will be inaccessible to screenreader users.
We need a way to allow human-readable text to provide the link text, probably via an attribute. The HTML area element uses the alt attribute.
The global HTML attribute title and ARIA aria-label should suffice, no need to specify alt for links.
Linking https://github.com/Maps4HTML/MapML/issues/181.