diff --git a/.gitignore b/.gitignore
index c23c97841c..26d41dc54a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -220,3 +220,21 @@ pip-log.txt
#############
build.properties
+
+#############
+## Output
+#############
+
+/output/
+/output.html
+/techniques/toc.html
+/techniques/techniques.xml
+/techniques/technique-associations.xml
+/techniques/index-flat.html
+/techniques/about-flat.html
+/understanding/toc.html
+/understanding/index-flat.html
+/understanding/about-flat.html
+/guidelines/wcag.xml
+/guidelines/versions.xml
+/guidelines/index-flat.html
diff --git a/acknowledgements/funders.html b/acknowledgements/funders.html
index 77b78f87d7..cc6ccd68eb 100644
--- a/acknowledgements/funders.html
+++ b/acknowledgements/funders.html
@@ -1,4 +1,4 @@
- This publication has been funded in part with U.S. Federal funds from the Health and Human Services, National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR), initially under contract number ED-OSE-10-C-0067 and now under contract number HHSP23301500054C. The content of this publication does not necessarily reflect the views or policies of the U.S. Department of Health and Human Services or the U.S. Department of Education, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. Government. Web Content Accessibility Guidelines (WCAG) 2.2 covers a wide range of recommendations for making Web content more accessible. Following these guidelines will make content more accessible to a wider range of people with disabilities, including accommodations for blindness and low vision, deafness and hearing loss, limited movement, speech disabilities, photosensitivity, and combinations of these, and some accommodation for learning disabilities and cognitive limitations; but will not address every user need for people with these disabilities. These guidelines address accessibility of web content on desktops, laptops, tablets, and mobile devices. Following these guidelines will also often make Web content more usable to users in general. WCAG 2.2 success criteria are written as testable statements that are not technology-specific. Guidance about satisfying the success criteria in specific technologies, as well as general information about interpreting the success criteria, is provided in separate documents. See Web Content Accessibility Guidelines (WCAG) Overview for an introduction and links to WCAG technical and educational material. WCAG 2.2 extends Web Content Accessibility Guidelines 2.1 [[WCAG21]], which was published as a W3C Recommendation June 2018. Content that conforms to WCAG 2.2 also conforms to WCAG 2.0 and WCAG 2.1. The WG intends that for policies requiring conformance to WCAG 2.0 or WCAG 2.1, WCAG 2.2 can provide an alternate means of conformance. The publication of WCAG 2.2 does not deprecate or supersede WCAG 2.0 or WCAG 2.1. While WCAG 2.0 and WCAG 2.1 remain W3C Recommendations, the W3C advises the use of WCAG 2.2 to maximize future applicability of accessibility efforts. The W3C also encourages use of the most current version of WCAG when developing or updating Web accessibility policies. Web Content Accessibility Guidelines (WCAG) 2.1 covers a wide range of recommendations for making Web content more accessible. Following these guidelines will make content more accessible to a wider range of people with disabilities, including accommodations for blindness and low vision, deafness and hearing loss, limited movement, speech disabilities, photosensitivity, and combinations of these, and some accommodation for learning disabilities and cognitive limitations; but will not address every user need for people with these disabilities. These guidelines address accessibility of web content on desktops, laptops, tablets, and mobile devices. Following these guidelines will also often make Web content more usable to users in general. WCAG 2.1 success criteria are written as testable statements that are not technology-specific. Guidance about satisfying the success criteria in specific technologies, as well as general information about interpreting the success criteria, is provided in separate documents. See Web Content Accessibility Guidelines (WCAG) Overview for an introduction and links to WCAG technical and educational material. WCAG 2.1 extends Web Content Accessibility Guidelines 2.0 [[WCAG20]], which was published as a W3C Recommendation December 2008. Content that conforms to WCAG 2.1 also conforms to WCAG 2.0. The WG intends that for policies requiring conformance to WCAG 2.0, WCAG 2.1 can provide an alternate means of conformance. The publication of WCAG 2.1 does not deprecate or supersede WCAG 2.0. While WCAG 2.0 remains a W3C Recommendation, the W3C advises the use of WCAG 2.1 to maximize future applicability of accessibility efforts. The W3C also encourages use of the most current version of WCAG when developing or updating Web accessibility policies. This is an Editors' Draft of Web Content Accessibility Guidelines (WCAG) 2.2. WCAG 2.1 is a W3C Recommendation. To comment, file an issue in the W3C WCAG GitHub repository. Although the proposed Success Criteria in this document reference issues tracking discussion, the Working Group requests that public comments be filed as new issues, one issue per discrete comment. It is free to create a GitHub account to file issues. If filing issues in GitHub is not feasible, send email to public-agwg-comments@w3.org (comment archive). This is a Recommendation of WCAG 2.1 by the Accessibility Guidelines Working Group. This incorporates errata and are described in the change log. At some point additional changes might be incorporated into an Edited or Amended Recommendation. To comment, file an issue in the W3C WCAG GitHub repository. Although the proposed Success Criteria in this document reference issues tracking discussion, the Working Group requests that public comments be filed as new issues, one issue per discrete comment. It is free to create a GitHub account to file issues. If filing issues in GitHub is not feasible, send email to public-agwg-comments@w3.org (comment archive). Web Content Accessibility Guidelines (WCAG) 2.2 defines how to make Web content more accessible to people with disabilities. Accessibility involves a wide range of disabilities, including visual, auditory, physical, speech, cognitive, language, learning, and neurological disabilities. Although these guidelines cover a wide range of issues, they are not able to address the needs of people with all types, degrees, and combinations of disability. These guidelines also make Web content more usable by older individuals with changing abilities due to aging and often improve usability for users in general. WCAG 2.2 is developed through the W3C process in cooperation with individuals and organizations around the world, with a goal of providing a shared standard for Web content accessibility that meets the needs of individuals, organizations, and governments internationally. WCAG 2.2 builds on WCAG 2.0 [[WCAG20]] and WCAG 2.1 [[WCAG21]], which in turn built on WCAG 1.0 [[WAI-WEBCONTENT]] and is designed to apply broadly to different Web technologies now and in the future, and to be testable with a combination of automated testing and human evaluation. For an introduction to WCAG, see the Web Content Accessibility Guidelines (WCAG) Overview. Web Content Accessibility Guidelines (WCAG) 2.1 defines how to make Web content more accessible to people with disabilities. Accessibility involves a wide range of disabilities, including visual, auditory, physical, speech, cognitive, language, learning, and neurological disabilities. Although these guidelines cover a wide range of issues, they are not able to address the needs of people with all types, degrees, and combinations of disability. These guidelines also make Web content more usable by older individuals with changing abilities due to aging and often improve usability for users in general. WCAG 2.1 is developed through the W3C process in cooperation with individuals and organizations around the world, with a goal of providing a shared standard for Web content accessibility that meets the needs of individuals, organizations, and governments internationally. WCAG 2.1 builds on WCAG 2.0 [[WCAG20]], which in turn built on WCAG 1.0 [[WAI-WEBCONTENT]] and is designed to apply broadly to different Web technologies now and in the future, and to be testable with a combination of automated testing and human evaluation. For an introduction to WCAG, see the Web Content Accessibility Guidelines (WCAG) Overview. Significant challenges were encountered in defining additional criteria to address cognitive, language, and learning disabilities, including a short timeline for development as well as challenges in reaching consensus on testability, implementability, and international considerations of proposals. Work will carry on in this area in future versions of WCAG. We encourage authors to refer to our supplemental guidance on improving inclusion for people with disabilities, including learning and cognitive disabilities, people with low-vision, and more. Where this document refers to The individuals and organizations that use WCAG vary widely and include Web designers and developers, policy makers, purchasing agents, teachers, and students. In order to meet the varying needs of this audience, several layers of guidance are provided including overall principles, general guidelines, testable success criteria and a rich collection of sufficient techniques, advisory techniques, and documented common failures with examples, resource links and code. Guidelines - Under the principles are guidelines. The 13 guidelines provide the basic goals that authors should work toward in order to make content more accessible to users with different disabilities. The guidelines are not testable, but provide the framework and overall objectives to help authors understand the success criteria and better implement the techniques. Success Criteria - For each guideline, testable success criteria are provided to allow WCAG 2.2 to be used where requirements and conformance testing are necessary such as in design specification, purchasing, regulation, and contractual agreements. In order to meet the needs of different groups and different situations, three levels of conformance are defined: A (lowest), AA, and AAA (highest). Additional information on WCAG levels can be found in Understanding Levels of Conformance. Success Criteria - For each guideline, testable success criteria are provided to allow WCAG 2.1 to be used where requirements and conformance testing are necessary such as in design specification, purchasing, regulation, and contractual agreements. In order to meet the needs of different groups and different situations, three levels of conformance are defined: A (lowest), AA, and AAA (highest). Additional information on WCAG levels can be found in Understanding Levels of Conformance. Sufficient and Advisory Techniques - For each of the guidelines and success criteria in the WCAG 2.2 document itself, the working group has also documented a wide variety of techniques. The techniques are informative and fall into two categories: those that are sufficient for meeting the success criteria and those that are advisory. The advisory techniques go beyond what is required by the individual success criteria and allow authors to better address the guidelines. Some advisory techniques address accessibility barriers that are not covered by the testable success criteria. Where common failures are known, these are also documented. See also Sufficient and Advisory Techniques in Understanding WCAG 2.2. Sufficient and Advisory Techniques - For each of the guidelines and success criteria in the WCAG 2.1 document itself, the working group has also documented a wide variety of techniques. The techniques are informative and fall into two categories: those that are sufficient for meeting the success criteria and those that are advisory. The advisory techniques go beyond what is required by the individual success criteria and allow authors to better address the guidelines. Some advisory techniques address accessibility barriers that are not covered by the testable success criteria. Where common failures are known, these are also documented. See also Sufficient and Advisory Techniques in Understanding WCAG 2.1. All of these layers of guidance (principles, guidelines, success criteria, and sufficient and advisory techniques) work together to provide guidance on how to make content more accessible. Authors are encouraged to view and apply all layers that they are able to, including the advisory techniques, in order to best address the needs of the widest possible range of users. Note that even content that conforms at the highest level (AAA) will not be accessible to individuals with all types, degrees, or combinations of disability, particularly in the cognitive, language, and learning areas. Authors are encouraged to consider the full range of techniques, including the advisory techniques, as well as to seek relevant advice about current best practice to ensure that Web content is accessible, as far as possible, to this community. Metadata may assist users in finding content most suitable for their needs. Note that even content that conforms at the highest level (AAA) will not be accessible to individuals with all types, degrees, or combinations of disability, particularly in the cognitive language and learning areas. Authors are encouraged to consider the full range of techniques, including the advisory techniques, as well as to seek relevant advice about current best practice to ensure that Web content is accessible, as far as possible, to this community. Metadata may assist users in finding content most suitable for their needs. The WCAG 2.2 document is designed to meet the needs of those who need a stable, referenceable technical standard. Other documents, called supporting documents, are based on the WCAG 2.2 document and address other important purposes, including the ability to be updated to describe how WCAG would be applied with new technologies. Supporting documents include: The WCAG 2.1 document is designed to meet the needs of those who need a stable, referenceable technical standard. Other documents, called supporting documents, are based on the WCAG 2.1 document and address other important purposes, including the ability to be updated to describe how WCAG would be applied with new technologies. Supporting documents include: How to Meet WCAG 2.2 - A customizable quick reference to WCAG 2.2 that includes all of the guidelines, success criteria, and techniques for authors to use as they are developing and evaluating Web content. This includes content from WCAG 2.0, 2.1 2.2 and can be filtered in many ways to help authors focus on relevant content. How to Meet WCAG 2.1 - A customizable quick reference to WCAG 2.1 that includes all of the guidelines, success criteria, and techniques for authors to use as they are developing and evaluating Web content. This includes content from WCAG 2.0 and WCAG 2.1 and can be filtered in many ways to help authors focus on relevant content. Understanding WCAG 2.2 - A guide to understanding and implementing WCAG 2.2. There is a short "Understanding" document for each guideline and success criterion in WCAG 2.2 as well as key topics. Understanding WCAG 2.1 - A guide to understanding and implementing WCAG 2.1. There is a short "Understanding" document for each guideline and success criterion in WCAG 2.1 as well as key topics. Techniques for WCAG 2.2 - A collection of techniques and common failures, each in a separate document that includes a description, examples, code and tests. Techniques for WCAG 2.1 - A collection of techniques and common failures, each in a separate document that includes a description, examples, code and tests. The WCAG Documents - A diagram and description of how the technical documents are related and linked. See Web Content Accessibility Guidelines (WCAG) Overview for a description of the WCAG 2.2 supporting material, including education resources related to WCAG 2. Additional resources covering topics such as the business case for Web accessibility, planning implementation to improve the accessibility of Web sites, and accessibility policies are listed in WAI Resources. See Web Content Accessibility Guidelines (WCAG) Overview for a description of the WCAG 2.1 supporting material, including education resources related to WCAG 2. Additional resources covering topics such as the business case for Web accessibility, planning implementation to improve the accessibility of Web sites, and accessibility policies are listed in WAI Resources. WCAG 2.2 meets a set of requirements for WCAG 2.2 which, in turn, inherit requirements from previous WCAG 2 versions. Requirements structure the overall framework of guidelines and ensure backwards compatibility. The Working Group also used a less formal set of acceptance criteria for success criteria, to help ensure success criteria are similar in style and quality to those in WCAG 2.0. These requirements constrained what could be included in WCAG 2.2. This constraint was important to preserve its nature as a dot-release of WCAG 2. WCAG 2.1 meets a set of requirements for WCAG 2.1 which, in turn, inherit requirements from WCAG 2.0. Requirements structure the overall framework of guidelines and ensure backwards compatibility. The Working Group also used a less formal set of acceptance criteria for success criteria, to help ensure success criteria are similar in style and quality to those in WCAG 2.0. These requirements constrained what could be included in WCAG 2.1. This constraint was important to preserve its nature as a dot-release of WCAG 2. WCAG 2.2 was initiated with the goal to continue the work of WCAG 2.1: Improving accessibility guidance for three major groups: users with cognitive or learning disabilities, users with low vision, and users with disabilities on mobile devices. Many ways to meet these needs were proposed and evaluated, and a set of these were refined by the Working Group. Structural requirements inherited from WCAG 2.0, clarity and impact of proposals, and timeline led to the final set of success criteria included in this version. The Working Group considers that WCAG 2.2 incrementally advances web content accessibility guidance for all these areas, but underscores that not all user needs are met by these guidelines. WCAG 2.2 builds on and is backwards compatible with WCAG 2.1, meaning web pages that conform to WCAG 2.2 also conform to WCAG 2.1, which would also conform to WCAG 2.0. Authors that are required by policy to conform with WCAG 2.0 or 2.1 will be able to update content to WCAG 2.2 without losing conformance with previous versions. Authors following more than one version of the guidelines should be aware of the following differences: WCAG 2.2 extends WCAG 2.1 by adding new success criteria, definitions to support them, and guidelines to organize the additions. This additive approach helps to make it clear that sites which conform to WCAG 2.2 also conform to WCAG 2.1. The Accessibility Guidelines Working Group recommends that sites adopt WCAG 2.2 as their new conformance target, even if formal obligations mention previous versions, to provide improved accessibility and to anticipate future policy changes. The following Success Criteria are new in WCAG 2.2: WCAG 2.1 was initiated with the goal to improve accessibility guidance for three major groups: users with cognitive or learning disabilities, users with low vision, and users with disabilities on mobile devices. Many ways to meet these needs were proposed and evaluated, and a set of these were refined by the Working Group. Structural requirements inherited from WCAG 2.0, clarity and impact of proposals, and timeline led to the final set of success criteria included in this version. The Working Group considers that WCAG 2.1 incrementally advances web content accessibility guidance for all these areas, but underscores that not all user needs are met by these guidelines. WCAG 2.1 builds on and is backwards compatible with WCAG 2.0, meaning web pages that conform to WCAG 2.1 also conform to WCAG 2.0. Authors that are required by policy to conform with WCAG 2.0 will be able to update content to WCAG 2.1 without losing conformance with WCAG 2.0. Authors following both sets of guidelines should be aware of the following differences: WCAG 2.1 extends WCAG 2.0 by adding new success criteria, definitions to support them, guidelines to organize the additions, and a couple additions to the conformance section. This additive approach helps to make it clear that sites which conform to WCAG 2.1 also conform to WCAG 2.0, thereby meeting conformance obligations that are specific to WCAG 2.0. The Accessibility Guidelines Working Group recommends that sites adopt WCAG 2.1 as their new conformance target, even if formal obligations mention WCAG 2.0, to provide improved accessibility and to anticipate future policy changes. The following Success Criteria are new in WCAG 2.1: The new success criteria may reference new terms that have also been added to the glossary and form part of the normative requirements of the success criteria. In addition to the above new Success Criteria, Focus Visible has been promoted from Level AA to Level A. In the Conformance section, a third note about page variants has been added to Full Pages, and an option for machine-readable metadata added to Optional Components of a Conformance Claim. In order to avoid confusion for implementers for whom backwards compatibility to WCAG 2 versions is important, new success criteria in WCAG 2.2 have been appended to the end of the set of success criteria within their guideline. This avoids the need to change the section number of success criteria from WCAG 2, which would be caused by inserting new success criteria between existing success criteria in the guideline, but it means success criteria in each guideline are no longer grouped by conformance level. The order of success criteria within each guideline does not imply information about conformance level; only the conformance level indicator (A / AA / AAA) on the success criterion itself indicates this. The WCAG 2.2 Quick Reference will provide a way to view success criteria grouped by conformance level, along with many other filter and sort options. In order to avoid confusion for implementers for whom backwards compatibility to WCAG 2.0 is important, new success criteria in WCAG 2.1 have been appended to the end of the set of success criteria within their guideline. This avoids the need to change the section number of success criteria from WCAG 2.0, which would be caused by inserting new success criteria between existing success criteria in the guideline, but it means success criteria in each guideline are no longer grouped by conformance level. The order of success criteria within each guideline does not imply information about conformance level; only the conformance level indicator (A / AA / AAA) on the success criterion itself indicates this. The WCAG 2.1 Quick Reference provides ways to view success criteria grouped by conformance level, along with many other filter and sort options. WCAG 2.2 uses the same conformance model as WCAG 2.0. It is intended that sites that conform to WCAG 2.2 also conform to WCAG 2.0 and WCAG 2.1, which means they meet the requirements of any policies that reference WCAG 2.0 or WCAG 2.1, while also better meeting the needs of users on the current Web. WCAG 2.1 uses the same conformance model as WCAG 2.0 with a couple additions, which is described in the Conformance section. It is intended that sites that conform to WCAG 2.1 also conform to WCAG 2.0, which means they meet the requirements of any policies that reference WCAG 2.0, while also better meeting the needs of users on the current Web. In parallel with WCAG 2.2, the Accessibility Guidelines Working Group is developing another major version of accessibility guidelines. The result of this work is expected to be a more substantial restructuring of web accessibility guidance than would be realistic for dot-releases of WCAG 2. The work follows a research-focused, user-centered design methodology to produce the most effective and flexible outcome, including the roles of content authoring, user agent support, and authoring tool support. This is a multi-year effort, so WCAG 2.2 is needed as an interim measure to provide updated web accessibility guidance to reflect changes on the web since the publication of WCAG 2.0. The Working Group might also develop additional interim versions, continuing with WCAG 2.2, on a similar short timeline to provide additional support while the major version is completed. In parallel with WCAG 2.1, the Accessibility Guidelines Working Group is developing another major version of accessibility guidelines. The result of this work is expected to be a more substantial restructuring of web accessibility guidance than would be realistic for dot-releases of WCAG 2. The work follows a research-focused, user-centered design methodology to produce the most effective and flexible outcome, including the roles of content authoring, user agent support, and authoring tool support. This is a multi-year effort, so WCAG 2.1 is needed as an interim measure to provide updated web accessibility guidance to reflect changes on the web since the publication of WCAG 2.0. The Working Group might also develop additional interim versions, continuing with WCAG 2.2, on a similar short timeline to provide additional support while the major version is completed. Information and user interface components must be presentable to users in ways they can perceive. Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language. Provide alternatives for time-based media. Create content that can be presented in different ways (for example simpler layout) without losing information or structure. Make it easier for users to see and hear content including separating foreground from background. User interface components and navigation must be operable. Make all functionality available from a keyboard. Provide users enough time to read and use content. Do not design content in a way that is known to cause seizures or physical reactions. New Make it easier for users to operate functionality through various inputs beyond keyboard. Information and the operation of the user interface must be understandable. Make text content readable and understandable. Make Web pages appear and operate in predictable ways. Help users avoid and correct mistakes. Content must be robust enough that it can be interpreted by a wide variety of user agents, including assistive technologies. Maximize compatibility with current and future user agents, including assistive technologies. This section lists requirements for conformance to WCAG 2.2. It also gives information about how to make conformance claims, which are optional. Finally, it describes what it means to be accessibility supported, since only accessibility-supported ways of using technologies can be relied upon for conformance. Understanding Conformance includes further explanation of the accessibility-supported concept. This section lists requirements for conformance to WCAG 2.1. It also gives information about how to make conformance claims, which are optional. Finally, it describes what it means to be accessibility supported, since only accessibility-supported ways of using technologies can be relied upon for conformance. Understanding Conformance includes further explanation of the accessibility-supported concept. The main content of WCAG 2.2 is normative and defines requirements that impact conformance claims. Introductory material, appendices, sections marked as "non-normative", diagrams, examples, and notes are informative (non-normative). Non-normative material provides advisory information to help interpret the guidelines but does not create requirements that impact a conformance claim. The main content of WCAG 2.1 is normative and defines requirements that impact conformance claims. Introductory material, appendices, sections marked as "non-normative", diagrams, examples, and notes are informative (non-normative). Non-normative material provides advisory information to help interpret the guidelines but does not create requirements that impact a conformance claim. The key words MAY, MUST, MUST NOT, NOT RECOMMENDED, RECOMMENDED, SHOULD, and SHOULD NOT are to be interpreted as described in [[RFC2119]]. In order for a Web page to conform to WCAG 2.2, all of the following conformance requirements must be satisfied: In order for a Web page to conform to WCAG 2.1, all of the following conformance requirements must be satisfied: Conformance claims are not required. Authors can conform to WCAG 2.2 without making a claim. However, if a conformance claim is made, then the conformance claim must include the following information: Conformance claims are not required. Authors can conform to WCAG 2.1 without making a claim. However, if a conformance claim is made, then the conformance claim must include the following information: A concise description of the Web pages, such as a list of URIs for which the claim is made, including whether subdomains are included in the claim. OR A "statement of partial conformance" may be made that the page does not conform, but could conform if certain parts were removed. The form of that statement would be, "This page does not conform, but would conform to WCAG 2.2 at level X if the following parts from uncontrolled sources were removed." In addition, the following would also be true of uncontrolled content that is described in the statement of partial conformance: A "statement of partial conformance" may be made that the page does not conform, but could conform if certain parts were removed. The form of that statement would be, "This page does not conform, but would conform to WCAG 2.1 at level X if the following parts from uncontrolled sources were removed." In addition, the following would also be true of uncontrolled content that is described in the statement of partial conformance: A "statement of partial conformance due to language" may be made when the page does not conform, but would conform if accessibility support existed for (all of) the language(s) used on the page. The form of that statement would be, "This page does not conform, but would conform to WCAG 2.2 at level X if accessibility support existed for the following language(s):" A "statement of partial conformance due to language" may be made when the page does not conform, but would conform if accessibility support existed for (all of) the language(s) used on the page. The form of that statement would be, "This page does not conform, but would conform to WCAG 2.1 at level X if accessibility support existed for the following language(s):" This section shows substantive changes made in WCAG 2.2 since WCAG 2.1. Errata fixes to WCAG 2.1 have also been incorporated into WCAG 2.2. The full commit history to WCAG 2.2 is available. This section shows changes for WCAG 2.1 since its publication as a W3C Recommendation. These changes are also recorded as errata. Changes since the W3C Recommendation of 05 June 2018: The full commit history to WCAG 2.1 is available. The following is a MathML version of the WCAG 2.2 definition of relative luminance. Refer to MathML Software - Browsers for information about browsers and plugins that support MathML which you may need in order to correctly display the information on this page. the relative brightness of any point in a colorspace, normalized to 0 for darkest black and 1 for lightest white For the sRGB colorspace, the relative luminance of a color is defined as where R, G and B are defined as: If then else
+ If then else
+ If then else
+ and are defined as: (Formula taken from [SRGB].) Before May 2021 the value of 0.04045 in the definition was different (0.03928). It was taken from an older version of the specification and has been updated. It has no practical effect on the calculations in the context of these guidelines. Almost all systems used today to view Web content assume sRGB encoding. Unless it
+ is known that another color space will be used to process and display the content,
+ authors should evaluate using sRGB colorspace. If using other color spaces, see Understanding Success Criterion 1.4.3.
+ If dithering occurs after delivery, then the source color value is used. For colors
+ that are dithered at the source, the average values of the colors that are dithered
+ should be used (average R, average G, and average B).
+ Tools are available that automatically do the calculations when testing contrast and
+ flash.
+ A mechanism for identifying the expanded form or meaning of abbreviations is available.
Enabling funders
+Enabling funders
Introduction
- Background on WCAG 2
- Background on WCAG 2
WCAG 2
it is intended to mean any and all versions of WCAG that start with 2.WCAG 2 Layers of Guidance
@@ -49,87 +49,95 @@
WCAG 2 Layers of Guidance
WCAG 2.2 Supporting Documents
- WCAG 2.1 Supporting Documents
+
- Requirements for WCAG 2.2
- Requirements for WCAG 2.1
+ Comparison with WCAG 2.1
- New Features in WCAG 2.2
- Comparison with WCAG 2.0
+ New Features in WCAG 2.1
+
-
Numbering in WCAG 2.2
- Numbering in WCAG 2.1
+ Conformance to WCAG 2.2
- Conformance to WCAG 2.1
+ Later Versions of Accessibility Guidelines
- Later Versions of Accessibility Guidelines
+ Perceivable
Text Alternatives
Time-based Media
Time-based Media
Adaptable
Adaptable
Distinguishable
Distinguishable
Operable
Keyboard Accessible
Keyboard Accessible
Enough Time
Enough Time
Seizures and Physical Reactions
Seizures and Physical Reactions
Input Modalities
+ Input Modalities
-
-
-
-
Input Modalities
Understandable
Readable
Readable
Predictable
Predictable
-
-
-
-
Input Assistance
Input Assistance
-
-
-
-
Input Assistance
Robust
Compatible
Compatible
Conformance
- Interpreting Normative Requirements
- Conformance Requirements
- Conformance Claims (Optional)
Required Components of a Conformance Claim
-
Optional Components of a Conformance Claim
Statement of Partial Conformance - Third Party Content
Statement of Partial Conformance - Third Party Content
Statement of Partial Conformance - Language
- Glossary
-
-
@@ -582,8 +571,6 @@ Glossary
-
-
@@ -592,10 +579,6 @@ Glossary
-
-
-
-
@@ -743,16 +726,26 @@ Glossary
Change Log
-
-
+ Focus Visible (Enhanced)
to Focus Appearance (Enhanced)
.
+
+ Acknowledgments
diff --git a/guidelines/relative-luminance.html b/guidelines/relative-luminance.html
new file mode 100644
index 0000000000..8854c9fca2
--- /dev/null
+++ b/guidelines/relative-luminance.html
@@ -0,0 +1,362 @@
+
+
+
+
+
+
+ MathML version of the relative luminance definition
+
+
+
+
diff --git a/guidelines/respec-config.js b/guidelines/respec-config.js
index 09acebd9b5..ad0b05237b 100644
--- a/guidelines/respec-config.js
+++ b/guidelines/respec-config.js
@@ -8,74 +8,71 @@ var respecConfig = {
permalinkHide: false,
tocIntroductory: true,
// specification status (e.g., WD, LC, NOTE, etc.). If in doubt use ED.
- specStatus: "ED",
+ specStatus: "REC",
//crEnd: "2012-04-30",
//perEnd: "2013-07-23",
//publishDate: "2013-08-22",
diffTool: "http://www.aptest.com/standards/htmldiff/htmldiff.pl",
// the specifications short name, as in https://www.w3.org/TR/short-name/
- shortName: "WCAG22",
+ shortName: "WCAG21",
// if you wish the publication date to be other than today, set this
- //publishDate: "2014-12-11",
+ publishDate: "2023-09-21",
copyrightStart: "2020",
license: "document",
// if there is a previously published draft, uncomment this and set its YYYY-MM-DD date
// and its maturity status
- //previousPublishDate: "2014-06-12",
- //previousMaturity: "WD",
- prevRecURI: "https://www.w3.org/TR/WCAG/",
+ previousPublishDate: "2018-06-05",
+ previousMaturity: "REC",
+ prevRecURI: "https://www.w3.org/TR/WCAG20/",
//previousDiffURI: "https://www.w3.org/TR/2014/REC-wai-aria-20140320/",
// if there a publicly available Editors Draft, this is the link
edDraftURI: "https://w3c.github.io/wcag/guidelines/22/",
+
+ // Implementation report
+ implementationReportURI: "https://www.w3.org/WAI/WCAG21/implementation-report/",
// if this is a LCWD, uncomment and set the end of its review period
// lcEnd: "2012-02-21",
+
+ // Name of the WG
+ group: "ag",
+ github: "w3c/wcag",
// editors, add as many as you like
// only "name" is required
editors: [
{
- name: "Chuck Adams",
- url: "https://www.oracle.com/",
- mailto: "charles.adams@oracle.com",
- company: "Oracle",
- companyURI: "https://www.oracle.com/",
- w3cid: 104852
+ name: "Andrew Kirkpatrick",
+ mailto: "akirkpat@adobe.com",
+ company: "Adobe",
+ companyURI: "http://www.adobe.com/",
+ w3cid: 39770
+ },
+ {
+ name: "Joshue O Connor",
+ mailto: "josh@interaccess.ie",
+ company: "Invited Expert, InterAccess",
+ companyURI: "https://interaccess.org/",
+ w3cid: 41218
},
{
name: "Alastair Campbell",
- url: "https://www.nomensa.com/",
mailto: "acampbell@nomensa.com",
company: "Nomensa",
companyURI: "https://www.nomensa.com/",
w3cid: 44689
},
- {
- name: "Rachael Montgomery",
- mailto: "rachael@accessiblecommunity.org",
- company: "Invited Expert",
- w3cid: 90310
- },
{
name: "Michael Cooper",
- url: 'https://www.w3.org',
mailto: "cooper@w3.org",
company: "W3C",
companyURI: "https://www.w3.org",
w3cid: 34017
- },
- {
- name: "Andrew Kirkpatrick",
- url: "http://www.adobe.com/",
- mailto: "akirkpat@adobe.com",
- company: "Adobe",
- companyURI: "http://www.adobe.com/",
- w3cid: 39770
}
],
/*
@@ -135,7 +132,7 @@ var respecConfig = {
],
*/
- // errata: 'https://www.w3.org/2010/02/rdfa/errata.html',
+ errata: 'https://www.w3.org/WAI/WCAG21/errata/',
// name of the WG
wg: "Accessibility Guidelines Working Group",
@@ -154,6 +151,6 @@ var respecConfig = {
wgPatentURI: "https://www.w3.org/2004/01/pp-impl/35422/status",
maxTocLevel: 4,
- postProcess: [addTextSemantics, swapInDefinitions]
+ postProcess: [postRespec]
};
diff --git a/guidelines/sc/20/abbreviations.html b/guidelines/sc/20/abbreviations.html
index 69d85cf406..81f0d0be8b 100644
--- a/guidelines/sc/20/abbreviations.html
+++ b/guidelines/sc/20/abbreviations.html
@@ -1,4 +1,4 @@
-
+
+
+
+
+
Abbreviations
@@ -7,4 +7,4 @@ Abbreviations
Audio Control
@@ -13,4 +13,4 @@ Audio Control
to meet other success criteria) must meet this success criterion. See Conformance Requirement 5: Non-Interference.
A mechanism is available to bypass blocks of content that are repeated on multiple Web pages.
-Changes of context are initiated only by user request or a mechanism is available to turn off such changes.
-AA
@@ -7,4 +7,4 @@Components that have the same functionality within a set of Web pages are identified consistently.
-Headings and labels describe topic or purpose.
-Context-sensitive help is available.
-Logotypes (text that is part of a logo or brand name) are considered essential.
-Logotypes (text that is part of a logo or brand name) are considered essential.
-Information, structure, and relationships conveyed through presentation can be programmatically determined or are available in text.
-All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes.
-Labels or instructions are provided when content requires user input.
-The default human language of each Web page can be programmatically determined.
-Information about the user's location within a set of Web pages is available.
-When the sequence in which content is presented affects its meaning, a correct reading sequence can be programmatically determined.
-More than one way is available to locate a Web page within a set of Web pages except where the Web Page is the result of, or a step in, a process.
-When any user interface component receives focus, it does not initiate a change of context.
-Changing the setting of any user interface component does not automatically cause a change of context unless the user has been advised of the behavior before using the component.
-Web pages have titles that describe topic or purpose.
-A
In content implemented using markup languages, elements have complete start and end @@ -10,9 +10,14 @@
Start and end tags that are missing a critical character in their formation, such - as a closing angle bracket or a mismatched attribute value quotation mark are not - complete. -
+This Success Criterion should be considered as always satisfied for any content using HTML or XML.
+ +Since this criterion was written, the HTML Living Standard has adopted specific requirements governing how user agents must handle incomplete tags, incorrect element nesting, duplicate attributes, and non-unique IDs. [[HTML]]
+ +Although the HTML Standard treats some of these cases as non-conforming for authors, it is considered to "allow these features" for the purposes of this Success Criterion because the specification requires that user agents support handling these cases consistently. In practice, this criterion no longer provides any benefit to people with disabilities in itself.
+ +Issues such as missing roles due to inappropriately nested elements or incorrect states or names due to a duplicate ID are covered by different Success Criteria and should be reported under those criteria rather than as issues with 4.1.1.
+AA
Except for captions and images of text, text can be resized without assistive technology up to 200 percent without loss of content or functionality.
-This success criterion covers sections within writing, not user interface components. User Interface components are covered under Success Criterion 4.1.2. +
This success criterion covers sections within writing, not user interface components. User interface components are covered under Success Criterion 4.1.2.
-Web pages do not contain anything that flashes more than three times in any one second period.
-A mechanism is available for identifying specific definitions of words or phrases used in an unusual or restricted way, including idioms and jargon.
-AAA
@@ -13,5 +13,5 @@AAA
Web content does not restrict use of input modalities available on a platform except where the restriction is essential, required to ensure the security of the content, or required to respect user settings.
diff --git a/guidelines/sc/21/content-on-hover-or-focus.html b/guidelines/sc/21/content-on-hover-or-focus.html index 1bbad2beee..2d15f34d09 100644 --- a/guidelines/sc/21/content-on-hover-or-focus.html +++ b/guidelines/sc/21/content-on-hover-or-focus.html @@ -1,5 +1,5 @@ -AA
diff --git a/guidelines/sc/21/identify-input-purpose.html b/guidelines/sc/21/identify-input-purpose.html index bd3e7b7992..7eb56ad302 100644 --- a/guidelines/sc/21/identify-input-purpose.html +++ b/guidelines/sc/21/identify-input-purpose.html @@ -1,4 +1,4 @@ -The purpose of each input field collecting information about the user can be programmatically determined when:
AAA
-In content implemented using markup languages, the purpose of User Interface Components, icons, and regions can be programmatically determined.
+In content implemented using markup languages, the purpose of user interface components, icons, and regions can be programmatically determined.
A
diff --git a/guidelines/sc/21/motion-actuation.html b/guidelines/sc/21/motion-actuation.html index b05e7afe54..dd80e956f7 100644 --- a/guidelines/sc/21/motion-actuation.html +++ b/guidelines/sc/21/motion-actuation.html @@ -1,4 +1,4 @@ -AAA
+ +The size of the target for pointer inputs is at least 44 by 44 CSS pixels except when:
+Exception: Human languages and scripts that do not make use of one or more of these text style properties in written text can conform using only the properties that exist for that combination of language and script.
- +A
-New
- -If an authentication process relies on a cognitive function test, at least one other method must also be available that does not rely on a cognitive function test.
- -AA
-New
- -All functionality that uses a dragging movement for operation can be operated by a single pointer without dragging, unless dragging is essential.
-This requirement applies to web content that interprets pointer actions (i.e. this does not apply to actions that are required to operate the user agent or assistive technology).
-Is there an assistive technology that helps for people with mobility impairments? The group would like feedback on the frontier between AT & author responsibility.
- -A
-New
- -For single page Web applications or any set of Web pages, if one of the following is available, - then access to at least one option is included in the same relative order on each page:
- -Access to help mechanisms may be provided directly on the page, or may be provided via a direct link to a different page containing the information"
- -A
-New
- -When a web page or set of web pages is an electronic publication with pagebreak locators, a mechanism is available to navigate to each locator and each locator maintains its place in the flow of content, even when the formatting or platform change.
- -AAA
-New
- -For the keyboard focus indicator of each User Interface Component, all of the following are true:
-AA
-New
- -For the keyboard focus indicator of each User Interface Component, all of the following are true:
-A keyboard focus indicator which has a pattern or gradient may have parts that do not meet the 3:1 contrast ratio for the change of contrast, as long as an area equal to the minimum does meet the contrast ratio.
-If the control has a visible boundary smaller than the hit area, the size measure is taken from the visible boundary.
-The working group is interested in feedback about the minimum area metric, and if there are unusual scenarios where visible indicators are caught by the wording.
- -A
-Changed
- -Any keyboard operable user interface has a mode of operation where the keyboard focus - indicator is visible. -
- -AA
-New
- -Controls needed to progress or complete a process are visible at the time they are needed without requiring pointer hover or keyboard focus, - or a mechanism is available to make them persistently visible.
- -AA
-New
- -For each target, there is an area with a width and height of at least 44 CSS pixels that includes it, and no other targets, except when:
-This criterion has been formulated to increase the hit-area of small targets, but the group would like feedback from providers of touch-screen devices if there is another way of forming the criteria to better complement the tap-heuristics used.
-Are there issues with internationalization when describing inline links?
-Are there issues with pop-over content overlapping targets triggering failures?
- -A
-New
- -For steps in a process, information previously entered by or provided to the user that is required on subsequent steps is either:
-Exception: When re-entering the information is essential.
-Security verification, such as repeating a password, is considered essential.
-Editors' note: Are there issues storing the data so a user can access it in subsequent steps?
-Editors' note: Are there broader exceptions needed than essential? E.g. for mandated or required information re-entry.
-shortened form of a word, phrase, or name where the abbreviation has not become part @@ -17,10 +17,10 @@
Not defined in all languages.
-SNCF is a French initialism that contains the initial letters of the Société Nationale des Chemins de Fer, the French national railroad. -
+ -ESP is an initialism for extrasensory perception.
+ @@ -30,9 +30,9 @@ name or phrase) which may be pronounced as a word -NOAA is an acronym made from the initial letters of the National Oceanic and Atmospheric +
diff --git a/guidelines/terms/20/accessibility-supported.html b/guidelines/terms/20/accessibility-supported.html index f33e2f900e..e863db98c9 100644 --- a/guidelines/terms/20/accessibility-supported.html +++ b/guidelines/terms/20/accessibility-supported.html @@ -1,4 +1,4 @@ -supported by users' assistive technologies as well as the accessibility features in browsers and other user agents
@@ -84,7 +84,7 @@Web technologies can be used in ways that are not accessibility supported as long - as they are not relied upon and the page as a whole meets the conformance requirements, including Conformance Criterion 4 and Conformance Criterion 5, are met. + as they are not relied upon and the page as a whole meets the conformance requirements, including Conformance Requirement 4 and Conformance Requirement 5.
When a Web Technology is used in a way that is "accessibility supported," it does not imply that the entire diff --git a/guidelines/terms/20/alternative-for-time-based-media.html b/guidelines/terms/20/alternative-for-time-based-media.html index 5e071239db..22bf2a0053 100644 --- a/guidelines/terms/20/alternative-for-time-based-media.html +++ b/guidelines/terms/20/alternative-for-time-based-media.html @@ -1,4 +1,4 @@ -
document including correctly sequenced text descriptions of time-based visual and diff --git a/guidelines/terms/20/ambiguous-to-users-in-general.html b/guidelines/terms/20/ambiguous-to-users-in-general.html index 4fc95a61f6..5260803b07 100644 --- a/guidelines/terms/20/ambiguous-to-users-in-general.html +++ b/guidelines/terms/20/ambiguous-to-users-in-general.html @@ -1,4 +1,4 @@ -
the purpose cannot be determined from the link and all information of the Web page @@ -6,10 +6,10 @@ would not know what a link would do until they activated it)
-The word guava in the following sentence "One of the notable exports is guava" is +
picture created by a spatial arrangement of characters or glyphs (typically from the diff --git a/guidelines/terms/20/assistive-technology.html b/guidelines/terms/20/assistive-technology.html index 6a75d242dd..7309001713 100644 --- a/guidelines/terms/20/assistive-technology.html +++ b/guidelines/terms/20/assistive-technology.html @@ -1,4 +1,4 @@ -
Assistive technologies that are important in the context of this document include +
narration added to the soundtrack to describe important visual details that cannot diff --git a/guidelines/terms/20/audio-only.html b/guidelines/terms/20/audio-only.html index fe88b4570c..7e467df2b6 100644 --- a/guidelines/terms/20/audio-only.html +++ b/guidelines/terms/20/audio-only.html @@ -1,7 +1,7 @@ -
a time-based presentation that contains only audio (no video and no interaction)
-the technology of sound reproduction
diff --git a/guidelines/terms/20/blinking.html b/guidelines/terms/20/blinking.html index da6b8073bd..fc9099697f 100644 --- a/guidelines/terms/20/blinking.html +++ b/guidelines/terms/20/blinking.html @@ -1,4 +1,4 @@ -switch back and forth between two visual states in a way that is meant to draw attention
diff --git a/guidelines/terms/20/blocks-of-text.html b/guidelines/terms/20/blocks-of-text.html index 82358e05ed..1b85e3dc14 100644 --- a/guidelines/terms/20/blocks-of-text.html +++ b/guidelines/terms/20/blocks-of-text.html @@ -1,6 +1,6 @@ -more than one sentence of text
-initialism for "Completely Automated Public Turing test to tell Computers and Humans diff --git a/guidelines/terms/20/captions.html b/guidelines/terms/20/captions.html index 226b7b509d..2192362d54 100644 --- a/guidelines/terms/20/captions.html +++ b/guidelines/terms/20/captions.html @@ -1,4 +1,4 @@ -
synchronized visual and/or text alternative for both speech and non-speech audio information needed to understand the media content diff --git a/guidelines/terms/20/changes-of-context.html b/guidelines/terms/20/changes-of-context.html index e155cbb307..b57e76b901 100644 --- a/guidelines/terms/20/changes-of-context.html +++ b/guidelines/terms/20/changes-of-context.html @@ -1,7 +1,7 @@ -
major changes in the content of the Web page that, if made without user awareness, can disorient users who are not able to view +
major changes that, if made without user awareness, can disorient users who are not able to view the entire page simultaneously
@@ -27,9 +27,9 @@ context, unless they also change one of the above (e.g., focus). -Opening a new window, moving focus to a different component, going to a new page (including +
satisfying all the requirements of a given standard, guideline or specification
-version that
diff --git a/guidelines/terms/20/content.html b/guidelines/terms/20/content.html index 237dbf564e..cce2c2c612 100644 --- a/guidelines/terms/20/content.html +++ b/guidelines/terms/20/content.html @@ -1,8 +1,8 @@ -information and sensory experience to be communicated to the user by means of a user agent, including code or markup that defines the content's structure, presentation, and interactions
-help text that provides information related to the function currently being performed
diff --git a/guidelines/terms/20/contrast-ratio.html b/guidelines/terms/20/contrast-ratio.html index eee5a807ce..66a1d522e9 100644 --- a/guidelines/terms/20/contrast-ratio.html +++ b/guidelines/terms/20/contrast-ratio.html @@ -1,4 +1,4 @@ -(L1 + 0.05) / (L2 + 0.05), where
diff --git a/guidelines/terms/20/correct-reading-sequence.html b/guidelines/terms/20/correct-reading-sequence.html index 979721b022..69799e4d81 100644 --- a/guidelines/terms/20/correct-reading-sequence.html +++ b/guidelines/terms/20/correct-reading-sequence.html @@ -1,8 +1,8 @@ -any sequence where words and paragraphs are presented in an order that does not change the meaning of the content
-a sudden, unexpected situation or occurrence that requires immediate action to preserve health, safety, or property
-if removed, would fundamentally change the information or functionality of the content, and information and functionality cannot be achieved in another way that would conform
-audio description that is added to an audiovisual presentation by pausing the video so that there is time to add additional description diff --git a/guidelines/terms/20/flash.html b/guidelines/terms/20/flash.html index c8bda462a7..9530426c48 100644 --- a/guidelines/terms/20/flash.html +++ b/guidelines/terms/20/flash.html @@ -1,4 +1,4 @@ -
a pair of opposing changes in relative luminance that can cause seizures in some people if it is large enough and in the right frequency diff --git a/guidelines/terms/20/functionality.html b/guidelines/terms/20/functionality.html index 6f61b9632c..edd851bd16 100644 --- a/guidelines/terms/20/functionality.html +++ b/guidelines/terms/20/functionality.html @@ -1,7 +1,7 @@ -
processes and outcomes achievable through user action
-a flash or rapidly changing image sequence is below the threshold (i.e., content passes) if any of the following are true: @@ -20,7 +20,7 @@
For general software or Web content, using a 341 x 256 pixel rectangle anywhere on - the displayed screen area when the content is viewed at 1024 x 768 pixels will provide - a good estimate of a 10 degree visual field for standard screen sizes and viewing - distances (e.g., 15-17 inch screen at 22-26 inches). (Higher resolutions displays - showing the same rendering of the content yield smaller and safer images so it is - lower resolutions that are used to define the thresholds.) +
For general software or Web content, using a 341 x 256 pixel rectangle anywhere on the displayed screen area when the content is viewed at 1024 x 768 pixels will provide a good estimate of a 10 degree visual field for standard screen sizes and viewing distances (e.g., 15-17 inch screen at 22-26 inches). This resolution of 75 - 85 ppi is known to be lower, and thus more conservative than the nominal CSS pixel resolution of 96 ppi in CSS specifications. Higher resolutions displays showing the same rendering of the content yield smaller and safer images so it is lower resolutions that are used to define the thresholds.
A transition is the change in relative luminance (or relative luminance/color for @@ -48,12 +43,8 @@ relative luminance/color for red flashing) measurement against time. A flash consists of two opposing transitions.
- -The current working definition in the field for "pair of opposing transitions involving a saturated red" is where, for either or both states involved in each transition, R/(R+ G + B) >= - 0.8, and the change in the value of (R-G-B)x320 is > 20 (negative values of (R-G-B)x320 - are set to zero) for both transitions. R, G, B values range from 0-1 as specified - in “relative luminance” definition. [[HARDING-BINNIE]] -
+ +The working definition (as of 2022) in the field for "pair of opposing transitions involving a saturated red" is a pair of opposing transitions where, one transition is either to or from a state with a value R/(R + G + B) that is greater than or equal to 0.8, and the difference between states is more than 0.2 (unitless) in the CIE 1976 UCS chromaticity diagram. [[ISO_9241-391]]
Tools are available that will carry out analysis from video screen capture. However, no tool is necessary to evaluate for this condition if flashing is less than or equal diff --git a/guidelines/terms/20/human-language.html b/guidelines/terms/20/human-language.html index f070d1f51c..17cc924943 100644 --- a/guidelines/terms/20/human-language.html +++ b/guidelines/terms/20/human-language.html @@ -1,4 +1,4 @@ -
language that is spoken, written or signed (through visual or tactile means) to communicate diff --git a/guidelines/terms/20/idiom.html b/guidelines/terms/20/idiom.html index 2e35d5528e..f62d1deab2 100644 --- a/guidelines/terms/20/idiom.html +++ b/guidelines/terms/20/idiom.html @@ -1,4 +1,4 @@ -
phrase whose meaning cannot be deduced from the meaning of the individual words and @@ -9,16 +9,16 @@ or language-dependent) meaning.
-In English, "spilling the beans" means "revealing a secret." However, "knocking over +
-In Japanese, the phrase "さじを投げる" literally translates into "he throws a spoon," but it means that there is nothing +
-In Dutch, "Hij ging met de kippen op stok" literally translates into "He went to roost with the chickens," but it means that +
text that has been rendered in a non-text form (e.g., an image) in order to achieve @@ -8,6 +8,6 @@
This does not include text that is part of a picture that contains significant other visual content.
-A person's name on a nametag in a photograph.
+for information purposes and not required for conformance
diff --git a/guidelines/terms/20/input-error.html b/guidelines/terms/20/input-error.html index 6b967a46b7..1febee2c75 100644 --- a/guidelines/terms/20/input-error.html +++ b/guidelines/terms/20/input-error.html @@ -1,4 +1,4 @@ -information provided by the user that is not accepted
diff --git a/guidelines/terms/20/jargon.html b/guidelines/terms/20/jargon.html index 769ca59b81..043bab2102 100644 --- a/guidelines/terms/20/jargon.html +++ b/guidelines/terms/20/jargon.html @@ -1,8 +1,8 @@ -words used in a particular way by people in a particular field
-The word StickyKeys is jargon from the field of assistive technology/accessibility.
+interface used by software to obtain keystroke input
@@ -7,11 +7,11 @@A keyboard interface allows users to provide keystroke input to programs even if the native technology does not contain a keyboard.
-A touchscreen PDA has a keyboard interface built into its operating system as well +
Operation of the application (or parts of the application) through a keyboard-operated diff --git a/guidelines/terms/20/label.html b/guidelines/terms/20/label.html index cb8a61e515..b8624b4ae2 100644 --- a/guidelines/terms/20/label.html +++ b/guidelines/terms/20/label.html @@ -1,4 +1,4 @@ -
text or other component with a text alternative that is presented to a user to identify a component within Web content
diff --git a/guidelines/terms/20/large-scale.html b/guidelines/terms/20/large-scale.html index b8fb9ae498..871bfd7c9b 100644 --- a/guidelines/terms/20/large-scale.html +++ b/guidelines/terms/20/large-scale.html @@ -1,4 +1,4 @@ -The actual size of the character that a user sees is dependent both on the author-defined - size and the user's display or user-agent settings. For many mainstream body text + size and the user's display or user agent settings. For many mainstream body text fonts, 14 and 18 point is roughly equivalent to 1.2 and 1.5 em or to 120% or 150% of the default size for body text (assuming that the body font is 100%), but authors would need to check this for the particular fonts in use. When fonts are defined in diff --git a/guidelines/terms/20/legal-commitments.html b/guidelines/terms/20/legal-commitments.html index 431518846b..58248faa76 100644 --- a/guidelines/terms/20/legal-commitments.html +++ b/guidelines/terms/20/legal-commitments.html @@ -1,10 +1,10 @@ -
transactions where the person incurs a legally binding obligation or benefit
-A marriage license, a stock trade (financial and legal), a will, a loan, adoption, +
nature of the result obtained by activating a hyperlink
-information captured from a real-world event and transmitted to the receiver with diff --git a/guidelines/terms/20/lower-secondary-education-level.html b/guidelines/terms/20/lower-secondary-education-level.html index a642496e60..12164166e0 100644 --- a/guidelines/terms/20/lower-secondary-education-level.html +++ b/guidelines/terms/20/lower-secondary-education-level.html @@ -1,4 +1,4 @@ -
the two or three year period of education that begins after completion of six years diff --git a/guidelines/terms/20/mechanism.html b/guidelines/terms/20/mechanism.html index bcaa507314..e2f2000a4d 100644 --- a/guidelines/terms/20/mechanism.html +++ b/guidelines/terms/20/mechanism.html @@ -1,4 +1,4 @@ -
process or technique for achieving a result diff --git a/guidelines/terms/20/media-alternative-for-text.html b/guidelines/terms/20/media-alternative-for-text.html index e1d55bbc4a..e1adab92ab 100644 --- a/guidelines/terms/20/media-alternative-for-text.html +++ b/guidelines/terms/20/media-alternative-for-text.html @@ -1,4 +1,4 @@ -
media that presents no more information than is already presented in text (directly diff --git a/guidelines/terms/20/name.html b/guidelines/terms/20/name.html index 6aa0f2923e..9530872de2 100644 --- a/guidelines/terms/20/name.html +++ b/guidelines/terms/20/name.html @@ -1,4 +1,4 @@ -
text by which software can identify a component within Web content to the user
diff --git a/guidelines/terms/20/navigated-sequentially.html b/guidelines/terms/20/navigated-sequentially.html index b22f97f533..23845c1801 100644 --- a/guidelines/terms/20/navigated-sequentially.html +++ b/guidelines/terms/20/navigated-sequentially.html @@ -1,7 +1,7 @@ -navigated in the order defined for advancing focus (from one element to the next) using a keyboard interface
-any content that is not a sequence of characters that can be programmatically determined or where the sequence is not expressing something in human language
diff --git a/guidelines/terms/20/normative.html b/guidelines/terms/20/normative.html index 379eac0c59..2fc3755f86 100644 --- a/guidelines/terms/20/normative.html +++ b/guidelines/terms/20/normative.html @@ -1,4 +1,4 @@ -required for conformance
diff --git a/guidelines/terms/20/on-a-full-screen-window.html b/guidelines/terms/20/on-a-full-screen-window.html index fb8445306a..61de699593 100644 --- a/guidelines/terms/20/on-a-full-screen-window.html +++ b/guidelines/terms/20/on-a-full-screen-window.html @@ -1,4 +1,4 @@ -on the most common sized desktop/laptop display with the viewport maximized
diff --git a/guidelines/terms/20/paused.html b/guidelines/terms/20/paused.html index 189b6261b1..38ce017635 100644 --- a/guidelines/terms/20/paused.html +++ b/guidelines/terms/20/paused.html @@ -1,6 +1,6 @@ -stopped by user request and not resumed until requested by user
-information that is not live
-rendering of the content in a form to be perceived by users
-six year time period that begins between the ages of five and seven, possibly without diff --git a/guidelines/terms/20/process.html b/guidelines/terms/20/process.html index 3a22b8194e..9cafc80647 100644 --- a/guidelines/terms/20/process.html +++ b/guidelines/terms/20/process.html @@ -1,15 +1,15 @@ -
series of user actions where each action is required in order to complete an activity
-Successful use of a series of Web pages on a shopping site requires users to view +
-An account registration page requires successful completion of a Turing test before +
additional information that can be programmatically determined from relationships with a link, combined with the link text, and presented to users in different modalities
-In HTML, information that is programmatically determinable from a link in English +
Since screen readers interpret punctuation, they can also provide the context from the current sentence, when the focus is on a link in that sentence. diff --git a/guidelines/terms/20/programmatically-determined.html b/guidelines/terms/20/programmatically-determined.html index 24d2994c17..8e7e7d248e 100644 --- a/guidelines/terms/20/programmatically-determined.html +++ b/guidelines/terms/20/programmatically-determined.html @@ -1,4 +1,4 @@ -
Determined in a markup language from elements and attributes that are accessed directly +
-Determined from technology-specific data structures in a non-markup language and exposed +
set by software using methods that are supported by user agents, including assistive technologies
-serving only an aesthetic purpose, providing no information, and having no functionality
@@ -7,6 +7,6 @@ changing their purpose. -The cover page of a dictionary has random words in very light text in the background.
+event that a) occurs at the same time as the viewing and b) is not completely generated by the content
-A Webcast of a live performance (occurs at the same time as the viewing and is not +
-An on-line auction with people bidding (occurs at the same time as the viewing).
+ -Live humans interacting in a virtual world using avatars (is not completely generated +
meaningful associations between distinct pieces of content
-the relative brightness of any point in a colorspace, normalized to 0 for darkest @@ -12,13 +12,13 @@
The "^" character is the exponentiation operator. (Formula taken from [[sRGB]] and - [[IEC-4WD]]). +
The "^" character is the exponentiation operator. (Formula taken from + [[SRGB]].)
+ +Before May 2021 the value of 0.04045 in the definition was different (0.03928). It was taken from an older version of the specification and has been updated. It has no practical effect on the calculations in the context of these guidelines.
Almost all systems used today to view Web content assume sRGB encoding. Unless it is known that another color space will be used to process and display the content, - authors should evaluate using sRGB colorspace. If using other color spaces, see Understanding Success Criterion 1.4.3. + authors should evaluate using sRGB colorspace. If using other color spaces, see Understanding Success Criterion 1.4.3.
If dithering occurs after delivery, then the source color value is used. For colors @@ -55,7 +57,7 @@ flash.
-A MathML version of the relative luminance definition is available. +
A separate page giving the relative luminance definition using MathML to display the formulas is available.
the content would not conform if that technology is turned off or is not supported
-text or number by which software can identify the function of a component within Web content
-A number that indicates whether an image functions as a hyperlink, command button, +
same result when used
-A submit "search" button on one Web page and a "find" button on another Web page may +
same position relative to other items
diff --git a/guidelines/terms/20/satisfies-a-success-criterion.html b/guidelines/terms/20/satisfies-a-success-criterion.html index 00c5714c9f..9290f95ea1 100644 --- a/guidelines/terms/20/satisfies-a-success-criterion.html +++ b/guidelines/terms/20/satisfies-a-success-criterion.html @@ -1,6 +1,6 @@ -the success criterion does not evaluate to 'false' when applied to the page
-a self-contained portion of written content that deals with one or more related topics diff --git a/guidelines/terms/20/set-of-web-pages.html b/guidelines/terms/20/set-of-web-pages.html index 01c5b084c2..bf154da489 100644 --- a/guidelines/terms/20/set-of-web-pages.html +++ b/guidelines/terms/20/set-of-web-pages.html @@ -1,4 +1,4 @@ -
collection of Web pages that share a common purpose and that are created by the same author, group or organization.
diff --git a/guidelines/terms/20/sign-language-interpretation.html b/guidelines/terms/20/sign-language-interpretation.html index 0273357ba2..01ce1d2c35 100644 --- a/guidelines/terms/20/sign-language-interpretation.html +++ b/guidelines/terms/20/sign-language-interpretation.html @@ -1,4 +1,4 @@ -translation of one language, generally a spoken language, into a sign language
diff --git a/guidelines/terms/20/sign-language.html b/guidelines/terms/20/sign-language.html index 08af0dd1b5..3d93532688 100644 --- a/guidelines/terms/20/sign-language.html +++ b/guidelines/terms/20/sign-language.html @@ -1,8 +1,8 @@ -a language using combinations of movements of the hands and arms, facial expressions, or body positions to convey meaning
-a sensory experience that is not purely decorative and does not primarily convey important information or perform a function
-Examples include a performance of a flute solo, works of visual art etc.
+additional content that illustrates or clarifies the primary content
-An audio version of a Web page. -
+ -An illustration of a complex process. -
+ -A paragraph summarizing the major outcomes and recommendations made in a research +
audio or video synchronized with another format for presenting information and/or with time-based interactive components, unless the media is a media alternative for text that is clearly labeled as such
-Some common examples of Web content technologies include HTML, CSS, SVG, PNG, PDF, +
Text that is programmatically associated with non-text content or referred to from text that is programmatically associated with non-text content. @@ -6,11 +6,11 @@ from the non-text content.
-An image of a chart is described in text in the paragraph after the chart. The short +
-Refer to Understanding Text Alternatives for more information. +
Refer to Understanding Text Alternatives for more information.
sequence of characters that can be programmatically determined, where the sequence is expressing something in human language
-words used in such a way that requires users to know exactly which definition to apply in order to understand the content correctly
-The term "gig" means something different if it occurs in a discussion of music concerts +
any software that retrieves and presents Web content for users
-Web browsers, media players, plug-ins, and other programs — including assistive technologies — that help in retrieving, rendering, and interacting with Web content. -
+data that is intended to be accessed by users
This does not refer to such things as Internet logs and search engine monitoring data.
-Name and address fields for a user's account.
+a part of the content that is perceived by users as a single control for a distinct @@ -6,7 +6,7 @@
Multiple user interface components may be implemented as a single programmatic element. - Components here is not tied to programming techniques, but rather to what the user + "Components" here is not tied to programming techniques, but rather to what the user perceives as separate controls.
@@ -18,9 +18,9 @@ called "user interface element". -An applet has a "control" that can be used to move through content by line or page +
a time-based presentation that contains only video (no audio and no interaction)
-the technology of moving or sequenced pictures or images
diff --git a/guidelines/terms/20/viewport.html b/guidelines/terms/20/viewport.html index ed138d7a67..26db33dc02 100644 --- a/guidelines/terms/20/viewport.html +++ b/guidelines/terms/20/viewport.html @@ -1,4 +1,4 @@ -object in which the user agent presents content
diff --git a/guidelines/terms/20/visually-customized.html b/guidelines/terms/20/visually-customized.html index 3ae6cecc67..e39ceb9841 100644 --- a/guidelines/terms/20/visually-customized.html +++ b/guidelines/terms/20/visually-customized.html @@ -1,6 +1,6 @@ -the font, size, color, and background can be set
-a non-embedded resource obtained from a single URI using HTTP plus any other resources @@ -12,24 +12,24 @@ within the scope of conformance to be considered a Web page.
-A Web resource including all embedded images and media.
+ -A Web mail program built using Asynchronous JavaScript and XML (AJAX). The program +
-A customizable portal site, where users can choose content to display from a set of +
-When you enter "http://shopping.example.com/" in your browser, you enter a movie-like +
visual angle of about 0.0213 degrees
@@ -6,7 +6,7 @@A CSS pixel is the canonical unit of measure for all lengths and measurements in CSS. This unit is density-independent, and distinct from actual hardware pixels present in a display. User agents and operating systems should ensure that a CSS pixel is - set as closely as possible to the CSS Values and Units Module Level 3 reference pixel [[!css3-values]], which takes into account the physical dimensions of the display + set as closely as possible to the CSS Values and Units Module Level 3 reference pixel [[css3-values]], which takes into account the physical dimensions of the display and the assumed viewing distance (factors that cannot be determined by content authors).
diff --git a/guidelines/terms/21/down-event.html b/guidelines/terms/21/down-event.html index fa6fe4b5e6..68779ef1c3 100644 --- a/guidelines/terms/21/down-event.html +++ b/guidelines/terms/21/down-event.html @@ -1,4 +1,4 @@ -platform event that occurs when the trigger stimulus of a pointer is depressed
The down-event may have different names on different platforms, such as "touchstart" or "mousedown".
diff --git a/guidelines/terms/21/keyboard-shortcut.html b/guidelines/terms/21/keyboard-shortcut.html index fbb2e7ab69..a83d043351 100644 --- a/guidelines/terms/21/keyboard-shortcut.html +++ b/guidelines/terms/21/keyboard-shortcut.html @@ -1,4 +1,4 @@ -alternative means of triggering an action by the pressing of one or more keys
diff --git a/guidelines/terms/21/motion-animation.html b/guidelines/terms/21/motion-animation.html index 854af17600..9da81ba9c0 100644 --- a/guidelines/terms/21/motion-animation.html +++ b/guidelines/terms/21/motion-animation.html @@ -1,7 +1,7 @@ -addition of steps between conditions to create the illusion of movement or to give a sense of a smooth transition
-For example, an element which moves into place or changes size while appearing is considered to be animated. An element which appears instantly without transitioning is not using animation. Motion animation does not include changes of color, blurring or opacity.
+input device that can target a specific coordinate (or set of coordinates) on a screen, - such as a mouse, pen, or touch contact -
- -See also Pointer Events pointer definition [[!pointerevents]]. -
+an input that only targets a single point on the page/screen at a time - such as a mouse, single finger on a touch screen, or stylus.
+In contrast to single pointer inputs, multipoint interactions involve the use of two or more pointers at the same time - such as two finger interactions on a touchscreen, or the simultaneous use of a mouse and stylus.
-perceivable, programmatically determined section of content
In HTML, any area designated with a landmark role would be a region.
diff --git a/guidelines/terms/21/set-of-web-pages.html b/guidelines/terms/21/set-of-web-pages.html index 6e5c4fa0bc..f435a86c58 100644 --- a/guidelines/terms/21/set-of-web-pages.html +++ b/guidelines/terms/21/set-of-web-pages.html @@ -1,14 +1,15 @@ -collection of web pages that share a common purpose and that are created by the same author, group or organization
-Examples include a publication which is split across multiple Web pages, where each page contains - one chapter or other significant section of the work. The publication is logically - a single contiguous unit, and contains navigation features that enable access to the - full set of pages. -
+Different language versions would be considered different sets of Web pages.
diff --git a/guidelines/terms/21/single-pointer.html b/guidelines/terms/21/single-pointer.html index 56caeadf43..46ea4f99f9 100644 --- a/guidelines/terms/21/single-pointer.html +++ b/guidelines/terms/21/single-pointer.html @@ -1,4 +1,4 @@ -pointer input that operates with one point of contact with the screen, including single taps and clicks, double-taps and clicks, long presses, and path-based gestures
diff --git a/guidelines/terms/21/state.html b/guidelines/terms/21/state.html index 4a93c03953..6910f5c3bc 100644 --- a/guidelines/terms/21/state.html +++ b/guidelines/terms/21/state.html @@ -1,4 +1,4 @@ -dynamic property expressing characteristics of a user interface component that may change in response to user action or automated processes
diff --git a/guidelines/terms/21/status-message.html b/guidelines/terms/21/status-message.html index 108359d7ed..12711848c1 100644 --- a/guidelines/terms/21/status-message.html +++ b/guidelines/terms/21/status-message.html @@ -1,4 +1,4 @@ -change in content that is not a change of context, and that provides information to the user on the success or results of an action, on the waiting state of an application, on the progress of a process, or on the existence of errors
diff --git a/guidelines/terms/21/style-property.html b/guidelines/terms/21/style-property.html index 4b63029de8..2c21fba7c2 100644 --- a/guidelines/terms/21/style-property.html +++ b/guidelines/terms/21/style-property.html @@ -1,4 +1,4 @@ -property whose value determines the presentation (e.g. font, color, size, location, padding, volume, synthesized speech prosody) of content elements as they are rendered (e.g. onscreen, via loudspeaker, via braille display) by user agents
diff --git a/guidelines/terms/21/target.html b/guidelines/terms/21/target.html index b978f6ead0..ab36d394cc 100644 --- a/guidelines/terms/21/target.html +++ b/guidelines/terms/21/target.html @@ -1,7 +1,7 @@ -region of the display that will accept a pointer action, such as the interactive area of a user interface component
-If two or more touch targets are overlapping, the overlapping area should not be included in the measurement of the target size, except when the overlapping targets perform the same action or open the same page.
+If two or more targets are overlapping, the overlapping area should not be included in the measurement of the target size, except when the overlapping targets perform the same action or open the same page.
platform event that occurs when the trigger stimulus of a pointer is released
The up-event may have different names on different platforms, such as "touchend" or "mouseup".
diff --git a/guidelines/terms/21/user-inactivity.html b/guidelines/terms/21/user-inactivity.html index 3bb0ef71d7..df98f1eb5c 100644 --- a/guidelines/terms/21/user-inactivity.html +++ b/guidelines/terms/21/user-inactivity.html @@ -1,4 +1,4 @@ -any continuous period of time where no user actions occur
The method of tracking will be determined by the web site or application.
diff --git a/guidelines/terms/22/cognitive-function-test.html b/guidelines/terms/22/cognitive-function-test.html deleted file mode 100644 index 2ba59509ce..0000000000 --- a/guidelines/terms/22/cognitive-function-test.html +++ /dev/null @@ -1,16 +0,0 @@ -New
- -A task that requires the user to remember, manipulate, or transcribe information. Examples include, but are not limited to:
-Remembering your own name, email address, or phone number is not considered a cognitive function test.
- -New
- -an operation where the pointer engages with an element on the down event and the element (or a representation of its position) follows the pointer
-The element could be, for example, a list item, a text element, or an image.
-New
- -Content presented as a collection of related articles, document in the form of a book, textbook, magazine article, journal, a single journal article that is presented as having different pages, scholarly journal, or newspaper article in digital format.
-New
-the pixels that change between the focused and unfocused states of a User Interface Component -
- -New
- -The point where the user’s input interacts with the web page. For example, tabbing through a page with a keyboard moves the focus. Clicking or tapping on the page would move the focus for mouse and touchscreen usage. Different inputs can be used by a user, but at any one time there would be one point of focus for the user with the last input used. -
- -New
- -Visual and/or programmatic markers that are arranged in a meaningful sequence to determine the location of a page in relation to others in the set.
-Examples would be:
-New
-Pages obtained from a single URI that provide navigation which changes the meaning of the Web page
-