* 仕様書

[REFS[
- [17] [CITE@en[Resource Hints]] ([TIME[2016-05-21 01:13:13 +09:00]]) 
<https://w3c.github.io/resource-hints/>
-- [18] [CITE@en[Resource Hints]] ([TIME[2016-05-21 01:13:13 +09:00]]) <https://w3c.github.io/resource-hints/#dfn-resource-hint-link>
]REFS]

[24] [CITE[HTML Standard]] および [CITE[Preload]] に関連規定があります。

* 概念

[23] 次の[[リンク型]]があります。
[FIG(short list)[
- [CODE(HTML)@en[dns-prefetch]]
- [CODE(HTML)@en[preconnect]]
- [CODE(HTML)@en[prefetch]]
- [CODE(HTML)@en[prerender]]
- [CODE(HTML)@en[preload]]
- [CODE(HTML)@en[next][rel-next]]
]FIG]

[22] 次の[[属性]]があります。
[FIG(short list)[
- [CODE(HTML)@en[<link href>]]
- [CODE(HTML)@en[<link rel>]]
- [CODE(HTML)@en[<link crossorigin>]]
- [CODE(HTML)@en[<link pr>]]
- [CODE(HTML)@en[<link as>]]
]FIG]

[20] 次の用語が定義されています。
[FIG(short list)[
- [[資源ヒントリンク]]
- [[投機的fetch]]
]FIG]

* 資源ヒントリンク

[19] [DFN[[RUBYB[資源ヒントリンク]@en[resource hint link]]]]は、
次の[[リンク型]]です [SRC[>>18]]。
[FIG(short list)[
- [CODE(HTML)@en[dns-prefetch]]
- [CODE(HTML)@en[preconnect]]
- [CODE(HTML)@en[prefetch]]
- [CODE(HTML)@en[prerender]]
]FIG]

[21] 定義上は含まれていませんが、 [CODE(HTML)@en[prefetch]] とみなされる
[CODE(HTML)[next][rel-next]] も同等として扱うべきと思われます。

* 歴史

[1] [CITE@en[Resource Hints]]
([TIME[2015-07-17 21:00:38 +09:00]] 版)
<http://www.w3.org/TR/2015/WD-resource-hints-20150717/>

[2] [CITE@en[Resource Hints]]
([TIME[2015-09-17 05:11:27 +09:00]] 版)
<http://www.w3.org/TR/2015/WD-resource-hints-20150916/>

[3] [CITE@en[Resource Hints]]
([TIME[2015-09-24 04:42:33 +09:00]] 版)
<http://www.w3.org/TR/2015/WD-resource-hints-20150923/>

[4] [CITE@en[Resource Hints]]
([TIME[2015-09-25 03:39:16 +09:00]] 版)
<http://www.w3.org/TR/2015/WD-resource-hints-20150924/>

[5] [CITE@en[Resource Hints]]
([TIME[2015-09-29 22:31:36 +09:00]] 版)
<http://www.w3.org/TR/2015/WD-resource-hints-20150929/>

[6] [CITE@en[Resource Hints]]
([TIME[2015-10-02 23:57:51 +09:00]] 版)
<http://www.w3.org/TR/2015/WD-resource-hints-20151002/>

[7] [CITE@en[Resource Hints]]
([TIME[2015-10-07 22:27:14 +09:00]] 版)
<http://www.w3.org/TR/2015/WD-resource-hints-20151007/>

[8] [CITE@en[Resource Hints]]
([TIME[2016-01-26 09:37:33 +09:00]] 版)
<https://www.w3.org/TR/2016/WD-resource-hints-20160126/>

[9] [CITE@en[Resource Hints]]
([TIME[2016-02-02 03:22:46 +09:00]] 版)
<https://www.w3.org/TR/2016/WD-resource-hints-20160201/>

[10] [CITE@en[Resource Hints]]
([TIME[2016-02-05 06:14:58 +09:00]] 版)
<https://www.w3.org/TR/2016/WD-resource-hints-20160204/>

[11] [CITE@en[Resource Hints]]
([TIME[2016-02-24 04:58:07 +09:00]] 版)
<https://www.w3.org/TR/2016/WD-resource-hints-20160223/>

[12] [CITE@en[Resource Hints]]
([TIME[2016-02-26 04:56:28 +09:00]] 版)
<https://www.w3.org/TR/2016/WD-resource-hints-20160225/>

[13] [CITE@en[Link relations: add dns-prefetch/preconnect/prerender; update prefetch]]
( ([[domenic]]著, [TIME[2016-04-28 07:26:36 +09:00]]))
<https://github.com/whatwg/html/commit/0f54b54307647ca15ace16ef03c570db1b918193>

[14] [CITE@en[Resource Hints]]
( ([TIME[2016-05-18 07:41:51 +09:00]]))
<https://www.w3.org/TR/2016/WD-resource-hints-20160517/>

[15] [CITE@en[Resource Hints]]
( ([TIME[2016-05-27 22:35:18 +09:00]]))
<https://www.w3.org/TR/2016/WD-resource-hints-20160527/>

[16] [CITE@en[Resource Hints]]
( ([TIME[2016-05-21 01:13:13 +09:00]]))
<https://w3c.github.io/resource-hints/>

[25] [CITE@en[Resource Hints]]
([TIME[2016-12-14 03:59:00 +09:00]])
<https://www.w3.org/TR/2016/WD-resource-hints-20161213/>

[26] [CITE@en[Resource Hints]]
([TIME[2017-03-23 04:31:48 +09:00]])
<https://www.w3.org/TR/2017/WD-resource-hints-20170322/>

[27] [CITE@en[Align with w3c/hr-time#47]]
([[plehegar]]著, [TIME[2017-05-05 03:36:31 +09:00]])
<https://github.com/w3c/resource-hints/commit/535c135ad480e6b48747de15c3880f8b4be430e6>

[28] [CITE@en[Resource Hints]]
([TIME[2017-05-05 03:37:25 +09:00]])
<https://www.w3.org/TR/2017/WD-resource-hints-20170504/>

[29] [CITE@en[Resource Hints]]
([TIME[2018-01-16 01:09:14 +09:00]])
<https://www.w3.org/TR/2018/WD-resource-hints-20180115/>

[30] [CITE@en[Resource Hints]]
([TIME[2018-01-16 01:09:14 +09:00]])
<https://www.w3.org/TR/2018/WD-resource-hints-20180115/>

[31] [CITE@en[W3C/WHATWG Relationship update]]
([TIME[2021-06-28T18:52:46.000Z]], [TIME[2021-10-05T09:49:52.304Z]])
<https://www.w3.org/2021/06/WHATWG-W3C-MOU_2021_update.html>

[32] [CITE@en[Moving Resource Hints · Issue #6 · w3c/whatwg-coord]]
([TIME[2021-10-05T09:57:08.000Z]])
<https://github.com/w3c/whatwg-coord/issues/6>