Should implementations use the ID from reference links, images and the like (
[A][ID]) to populate the
id attribute in the generated HTML output? They currently don’t. Like with auto generated identifiers for headings (as in Pandoc, Maruku, Showdown and Kramdown), they would have to add a disambiguating counter if a reference is used twice or more.
[A][ID] [ID]: HREF
<p><a href="HREF" id="ID">A</a></p>
These anchors may not be the most important thing for interactive hyperlinks, but imagine printed documents where you could output a References or Bibliography section with backlinks to the actual citations of a certain entry. It might also be useful for future extensions that overload the link syntax.