* 仕様書

[REFS[
- [2] [CITE@en-GB-x-hixie[HTML Standard]] ([TIME[2015-03-15 01:40:28 +09:00]] 版) <https://html.spec.whatwg.org/#dom-cva-validity>
]REFS]

* 歴史

[REFS[
-[1] [CITE@en-GB-x-Hixie[Web Forms 2.0]]
([TIME[2009-01-05 20:07:15 +09:00]] 版)
<http://www.whatwg.org/specs/web-forms/current-work/#validity>
]REFS]

[3] [CITE@en[Editorial: clean up wording around form validation API · whatwg/html@26665c1]]
([TIME[2016-04-26 12:00:12 +09:00]] 版)
<https://github.com/whatwg/html/commit/26665c1a854eed59487fb7b2a24bdc011a6701f0>

[4] [CITE@en[Remove <keygen>]]
([[domenic]]著, [TIME[2017-01-14 07:03:02 +09:00]])
<https://github.com/whatwg/html/commit/5baa38720f6e83c94a50018c4565808ad548d69c>