[wp-trac] [WordPress Trac] #37841: HTML 5 syntax error with rel='https://api.w.org/'

[WordPress Trac]

#37841: HTML 5 syntax error with rel='https://api.w.org/'
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 Reporter:  zhanglide2018   |       Owner:
     Type:  task (blessed)  |      Status:  new
 Priority:  normal          |   Milestone:  Awaiting Review
Component:  REST API        |     Version:  4.6
 Severity:  normal          |  Resolution:
 Keywords:                  |     Focuses:
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Comment (by zhanglide2018):

 Replying to [comment:3 rmccue]:
 > I dug into this a bit; custom URI relations are not valid in the
 [https://html.spec.whatwg.org/multipage/semantics.html#other-link-types
 WHATWG HTML spec] per
 [https://www.w3.org/Bugs/Public/show_bug.cgi?id=13068 this issue], however
 they are valid in the [https://www.w3.org/TR/html5/links.html#linkTypes
 W3C HTML5 spec] per [https://www.w3.org/html/wg/tracker/issues/170 this
 issue] (basically same as the other one).
 >
 > Anyway, the text of the W3C spec says:
 >
 > > The remaining values must be accepted as valid if they are absolute
 URLs containing US-ASCII characters only and rejected otherwise.
 >
 > That's true for `https://api.w.org/`. I suspect the issue is that the
 validator is coded to follow the WHATWG spec, rather than the W3C spec.
 >
 > Anyway, tl;dr, we can add it to the [http://microformats.org/wiki
 /existing-rel-values#HTML5_link_type_extensions Microformats page], and
 then it's definitely valid in either spec.
 >
 > This is hence a task to add to that wiki page. :)
 Thanks a lot!

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Ticket URL: <https://core.trac.wordpress.org/ticket/37841#comment:4>
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