Section “6.7 Autolinks” lacks the scheme support for Freenet.
Is it even a good idea to give an explicit list of schemes? What happens when there are new schemes? We change the spec and every implementation with it?
I am not sure where the spec has taken this list from, but it looks fairly close to IANA’s. (I have not done a side-by-side, might be equal.) Looking through the officially recognised schemes shows freenet
is not registered, which would explain why it is missing.
It might be the spec is requiring matching the scheme so it will not accidentally change XHTML elements under a namespace into links, e.g. <svg:svg>
opens an SVG element under the SVG syntax. Example from MDN:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:svg="http://www.w3.org/2000/svg">
<body>
<h1>SVG embedded inline in XHTML</h1>
<svg:svg width="300px" height="200px">
<svg:circle cx="150" cy="100" r="50" fill="#ff0000"/>
</svg:svg>
</body>
</html>
IIRC HTML5 did away with this and is no longer allowing colons within tag names, so if SMD is only to look at the latest HTML specification it could probably drop all such limitations.