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add in canonical #1467

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add in canonical #1467

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a7bf4f8
add in canonical
scottaohara Jun 19, 2018
5b37961
remove separate listing of tokens
scottaohara Jun 19, 2018
29c999d
add spec reference for link/canonical rfc6596
chaals Jun 20, 2018
b888da9
add to changelog
chaals Jun 20, 2018
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3 changes: 3 additions & 0 deletions sections/changes.include
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Expand Up @@ -13,6 +13,9 @@
<h3 id="changes-wd3">Changes since the <a href="https://www.w3.org/TR/2017/WD-html53-20170206/">HTML 5.3 Second Public Working Draft</a></h3>

<dl>
<dt><a href="https://github.com/w3c/html/pull/1467">Add <code>canonical</code></a>
as a supported link type.</dt>
<dd>Defined in [[rfc6596]].</dd>
<dt><a href="https://github.com/w3c/html/pull/1406">Only select a browsing context by name</a>
from within the <a>unit of related browsing contexts</a>.</dt>
<dd>Match Firefox and Blink changes, to mitigate <a href="https://github.com/w3c/html/issues/262">an XSS attack vector</a>.</dd>
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17 changes: 2 additions & 15 deletions sections/semantics-document-metadata.include
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Expand Up @@ -405,21 +405,8 @@

<{link/rel}>'s [=supported tokens=] are the keywords defined in [=HTML link types=] which are
allowed to be used with <{link}> elements, impact the processing model, and are supported by
the user agent. The possible [=supported tokens=] are
<{link/alternate}>,
<code>dns-prefetch</code>,
<{link/icon}>,
<{link/next}>,
<code data-x="rel-pingback">pingback</code>,
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Remove pingback from the rel attribute value of <link> element?

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probably should do that as a different issue / PR. better to track things rather than get them all mixed together. Happy to have you open an issue about that though :)

<code data-x="rel-preconnect">preconnect</code>,
<code data-x="rel-prefetch">prefetch</code>,
<code data-x="rel-preload">preload</code>,
<code data-x="rel-prerender">prerender</code>,
<{link/search}>,
<code data-x="rel-serviceworker">serviceworker</code>, and
<{link/stylesheet}>.
A <{link/rel}>'s [=supported tokens=] must only include the tokens (keywords) from this list
that the user agent implements the processing model for.
the user agent. A <{link/rel}> must only include the tokens (keywords) outlined in the
table of [=supported tokens=] that the user agent implements the processing model for.

If a <{link}> element has a <{link/rel}> attribute that contains only keywords that are
<a>body-ok</a>, then the element is said to be <dfn>allowed in the body</dfn>. This means
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17 changes: 17 additions & 0 deletions sections/semantics-links.include
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Expand Up @@ -1098,6 +1098,14 @@
<td>Gives the permalink for the nearest ancestor section.</td>
</tr>

<tr>
<td><{link/canonical}></td>
<td><em>not allowed</em></td>
<td><a>hyperlink</a></td>
<td class="no"> · </td>
<td>Gives the preferred URL for the current document.</td>
</tr>

<tr>
<td><{link/dns-prefetch}></td>
<td><em>not allowed</em></td>
Expand Down Expand Up @@ -1401,6 +1409,15 @@
</xmp>
</div>

<h5 id="link-type-canonical">Link type "<dfn element-state for="link"><code>canonical</code></dfn>"</h5>

The <{link/canonical}> keyword may be used with the <{link}> element.
This keyword creates a <a>hyperlink</a>

The <{link/canonical}> keyword indicates that the URL given by the <{links/href}> attribute
is the preferred URL for the current document. Indicating the preferred URL helps search engines
reduce duplicate content, as described in more detail in The Canonical Link Relation specification [[!rfc6596]].

<h5 id="link-type-dns-prefetch">Link type "<dfn element-state for="link"><code>dns-prefetch</code></dfn>"</h5>

The <{link/dns-prefetch}> keyword may be used with <{link}>.This keyword is <a>body-ok</a>.
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