Web Content Accessibility Guidelines (WCAG) 2.1 Errata

Abstract

This document records all known errors in the Web Content Accessibility Guidelines (WCAG) 2.1 specification.

The errata are classified as Substantive or Editorial, as classified by the W3C Classes of Changes, and listed in reverse chronological order based on the date of publication to which they are applicable.

Each entry has the following information:

The date it was added to the errata page.
The section referred to.
A description of the problem and correction if applicable.
A rationale for making the change (not required for editorial errata).

Substantive corrections are proposed by the Accessibility Guidelines Working Group, which has consensus that they are appropriate; they are not to be considered normative until a new Recommendation is published following the process to revise a Recommendation.

Please view the public comment instructions if you would like to comment to the Working Group. Comments submitted are publicly available in the archive for the Accessibility Guidelines Working Group public comments mailing list.

The full commit history can be viewed on GitHub.

Errata since Current Publication

Substantive Errata

No substantive errata have been recorded at present.

Editorial Errata

No editorial errata have been recorded at present.

Errata since 05 June 2018 Publication

Substantive Errata

No substantive errata have been recorded at present.

Editorial Errata

2023-04-18: In 4.1.1 Parsing, removing one note and adding two new notes, including: "This Success Criterion should be considered as always satisfied for any content using HTML or XML." (#3152)
2022-02-22: In the definition of relative luminance, updating the red threshold from 0.03928 to 0.04045. (#1780)
2022-02-02: In a note in the definition of accessibility supported, updating "Conformance Criterion" references to "Conformance Requirement". (#1777)
2019-05-09: In 1.3.4 Orientation, clarifying the note referencing "binary display orientation" to read "content is not necessarily restricted to landscape or portrait display orientation". (#724)
2018-08-06: In 1.4.13 Content on Hover or Focus, correcting the word "dismissable" to "dismissible". (b043430)
2018-08-06: In 4. Robust, removing repetition of the word "by". (6f883b5)
2018-08-06: In 5.2.2 Full pages, removing "New" from the beginning of the third note. (5d42e28)
2018-07-11: In the Introduction, correcting several (but not all) "WCAG 2.0" references to "WCAG 2.1". (#430, #426, 170c48a)
2018-07-11: In 1.4.10 Reflow, removing a supernumary "Note" indicator from the first note. (#429)
2018-07-11: In the definition for keyboard interface, updating the second (of three) notes to be an example of the first note, leaving only two actual notes. (#428)
2018-07-11: In the definition for technology, updating the third note to instead be an example. (#428)
2018-07-11: In 5.3.1 Required Components of a Conformance Claim, removing the editorial note "In WCAG 2.0 this was a dated URI, which may need to be adjusted when this becomes a Rec." (#427)
2018-07-11: In the 0.5.2 Numbering in WCAG 2.1, correcting the words "critera" and "ccriteria" to "criteria". (#426)
2018-06-08: In 7. Input Purposes for User Interface Components, correcting the word "county" to "country". (426e131)
In the Status of This Document, removing the first instance of the repeated paragraph beginning "This document has been reviewed by W3C Members...".

Web Content Accessibility Guidelines (WCAG) 2.1 Errata

Abstract

Table of Contents

Errata since Current Publication

Substantive Errata

Editorial Errata

Errata since 05 June 2018 Publication

Substantive Errata

Editorial Errata