What is the point of limiting URI schemes in autolinks?

[rwzy]

@Burt_Harris

Since an autolink requires an absolute url including a colon, and normal HTML tag names don’t include colons, it doesn’t seem like there would be risk of conflict.

Agreed.

@Burt_Harris

Even if there were reason for allowing namespace-qualified pseudo-HTML tags, it would be possible to disambiguate by including white space in the tag (since white space isn’t generally permitted in a URL.)

If that was the case, which I don’t think it would be since it would be very strange, I do not think requiring white space in such a tag to differentiate between a link is acceptable. I think whitelisting would be a better approach in that case.

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However again, I cannot see why it is not already possible to differentiate between a valid html tag, none of which allow a colon, and an absolute uri, which requires a colon. And, even if point 2 here was the case (which it isn’t currently), where the colon is not required, that could still be differentiated from a html tag by the required dot or hash symbol.