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wcag.json
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{
"principles": [
{
"id": "WCAG2:perceivable",
"num": "1",
"versions": [
"2.0",
"2.1",
"2.2"
],
"handle": "Perceivable",
"title": "Information and user interface components must be presentable to users in ways they can perceive.",
"guidelines": [
{
"id": "WCAG2:text-alternatives",
"alt_id": [
"text-equiv"
],
"num": "1.1",
"versions": [
"2.0",
"2.1",
"2.2"
],
"handle": "Text Alternatives",
"title": "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.",
"successcriteria": [
{
"id": "WCAG2:non-text-content",
"alt_id": [
"text-equiv-all"
],
"num": "1.1.1",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "A",
"handle": "Non-text Content",
"title": "All non-text content that is presented to the user has a text alternative that serves the equivalent purpose, except for the situations listed below.",
"details": [
{
"type": "ulist",
"items": [
{
"handle": "Controls, Input",
"text": "If non-text content is a control or accepts user input, then it has a name that describes its purpose. (Refer to Success Criterion 4.1.2 for additional requirements for controls and content that accepts user input.)"
},
{
"handle": "Time-Based Media",
"text": "If non-text content is time-based media, then text alternatives at least provide descriptive identification of the non-text content. (Refer to Guideline 1.2 for additional requirements for media.)"
},
{
"handle": "Test",
"text": "If non-text content is a test or exercise that would be invalid if presented in text, then text alternatives at least provide descriptive identification of the non-text content."
},
{
"handle": "Sensory",
"text": "If non-text content is primarily intended to create a specific sensory experience, then text alternatives at least provide descriptive identification of the non-text content."
},
{
"handle": "CAPTCHA",
"text": "If the purpose of non-text content is to confirm that content is being accessed by a person rather than a computer, then text alternatives that identify and describe the purpose of the non-text content are provided, and alternative forms of CAPTCHA using output modes for different types of sensory perception are provided to accommodate different disabilities."
},
{
"handle": "Decoration, Formatting, Invisible",
"text": "If non-text content is pure decoration, is used only for visual formatting, or is not presented to users, then it is implemented in a way that it can be ignored by assistive technology."
}
]
}
],
"techniques": [
{
"sufficient": [
{
"situations": [
{
"title": "Situation A: If a short description can serve the same purpose and present the same information as the non-text content:",
"techniques": [
{
"id": "TECH:G94",
"title": "Providing short text alternative for non-text content that serves the same purpose and presents the same information as the non-text content"
},
{
"id": "TECH:ARIA6",
"title": "Using aria-label to provide labels for objects"
},
{
"id": "TECH:ARIA10",
"title": "Using aria-labelledby to provide a text alternative for non-text content"
},
{
"id": "TECH:G196",
"title": "Using a text alternative on one item within a group of images that describes all items in the group"
},
{
"id": "TECH:H2",
"title": "Combining adjacent image and text links for the same resource"
},
{
"id": "TECH:H37",
"title": "Using alt attributes on img elements"
},
{
"id": "TECH:H53",
"title": "Using the body of the object element"
},
{
"id": "TECH:H86",
"title": "Providing text alternatives for emojis, emoticons, ASCII art, and leetspeak"
},
{
"id": "TECH:PDF1",
"title": "Applying text alternatives to images with the Alt entry in PDF documents"
}
]
},
{
"title": "Situation B: If a short description can not serve the same purpose and present the same information as the non-text content (e.g., a chart or diagram):",
"techniques": [
{
"id": "TECH:G95",
"title": "Providing short text alternatives that provide a brief description of the non-text content"
},
{
"id": "TECH:ARIA6",
"title": "Using aria-label to provide labels for objects"
},
{
"id": "TECH:ARIA10",
"title": "Using aria-labelledby to provide a text alternative for non-text content"
},
{
"id": "TECH:G196",
"title": "Using a text alternative on one item within a group of images that describes all items in the group"
},
{
"id": "TECH:H2",
"title": "Combining adjacent image and text links for the same resource"
},
{
"id": "TECH:H35",
"title": ""
},
{
"id": "TECH:H37",
"title": "Using alt attributes on img elements"
},
{
"id": "TECH:H53",
"title": "Using the body of the object element"
},
{
"id": "TECH:H86",
"title": "Providing text alternatives for emojis, emoticons, ASCII art, and leetspeak"
},
{
"id": "TECH:PDF1",
"title": "Applying text alternatives to images with the Alt entry in PDF documents"
},
{
"id": "TECH:ARIA15",
"title": "Using aria-describedby to provide descriptions of images"
},
{
"id": "TECH:G73",
"title": "Providing a long description in another location with a link to it that is immediately adjacent to the non-text content"
},
{
"id": "TECH:G74",
"title": "Providing a long description in text near the non-text content, with a reference to the location of the long description in the short description"
},
{
"id": "TECH:G92",
"title": "Providing long description for non-text content that serves the same purpose and presents the same information"
},
{
"id": "TECH:H53",
"title": "Using the body of the object element"
}
]
},
{
"title": "Situation C: If non-text content is a control or accepts user input:",
"techniques": [
{
"id": "TECH:G82",
"title": "Providing a text alternative that identifies the purpose of the non-text content"
},
{
"id": "TECH:ARIA6",
"title": "Using aria-label to provide labels for objects"
},
{
"id": "TECH:ARIA9",
"title": "Using aria-labelledby to concatenate a label from several text nodes"
},
{
"id": "TECH:H24",
"title": "Providing text alternatives for the area elements of image maps"
},
{
"id": "TECH:H30",
"title": "Providing link text that describes the purpose of a link for anchor elements"
},
{
"id": "TECH:H36",
"title": "Using alt attributes on images used as submit buttons"
},
{
"id": "TECH:H44",
"title": "Using label elements to associate text labels with form controls"
},
{
"id": "TECH:H65",
"title": "Using the title attribute to identify form controls when the label element cannot be used"
}
]
},
{
"title": "Situation D: If non-text content is time-based media (including live video-only and live audio-only); a test or exercise that would be invalid if presented in text; or primarily intended to create a specific sensory experience:",
"techniques": [
{
"id": "TECH:future-non-text-content-1",
"title": "Providing a descriptive label using one of the following :"
},
{
"id": "TECH:G68",
"title": "Providing a short text alternative that describes the purpose of live audio-only and live video-only content"
},
{
"id": "TECH:G100",
"title": "Providing a short text alternative which is the accepted name or a descriptive name of the non-text content"
},
{
"id": "TECH:ARIA6",
"title": "Using aria-label to provide labels for objects"
},
{
"id": "TECH:ARIA10",
"title": "Using aria-labelledby to provide a text alternative for non-text content"
},
{
"id": "TECH:G196",
"title": "Using a text alternative on one item within a group of images that describes all items in the group"
},
{
"id": "TECH:H2",
"title": "Combining adjacent image and text links for the same resource"
},
{
"id": "TECH:H37",
"title": "Using alt attributes on img elements"
},
{
"id": "TECH:H53",
"title": "Using the body of the object element"
},
{
"id": "TECH:H86",
"title": "Providing text alternatives for emojis, emoticons, ASCII art, and leetspeak"
},
{
"id": "TECH:PDF1",
"title": "Applying text alternatives to images with the Alt entry in PDF documents"
}
]
},
{
"title": "Situation E: If non-text content is a CAPTCHA:",
"techniques": [
{
"and": [
{
"id": "TECH:G143",
"title": "Providing a text alternative that describes the purpose of the CAPTCHA"
},
{
"id": "TECH:G144",
"title": "Ensuring that the Web Page contains another CAPTCHA serving the same purpose using a different modality"
}
]
}
]
},
{
"title": "Situation F: If the non-text content should be ignored by assistive technology:",
"techniques": [
{
"id": "TECH:future-non-text-content-1",
"title": "Implementing or marking the non-text content so that it will be ignored by assistive technology using one of the following :"
},
{
"id": "TECH:C9",
"title": "Using CSS to include decorative images"
},
{
"id": "TECH:H67",
"title": "Using null alt text and no title attribute on img elements for images that assistive technology should ignore"
},
{
"id": "TECH:PDF4",
"title": "Hiding decorative images with the Artifact tag in PDF documents"
}
]
}
]
}
]
},
{
"advisory": []
},
{
"failure": [
{
"id": "TECH:F3",
"title": "Failure of Success Criterion 1.1.1 due to using CSS to include images that convey important information"
},
{
"id": "TECH:F13",
"title": "Failure of Success Criterion 1.1.1 and 1.4.1 due to having a text alternative that does not include information that is conveyed by color differences in the image"
},
{
"id": "TECH:F20",
"title": "Failure of Success Criterion 1.1.1 and 4.1.2 due to not updating text alternatives when changes to non-text content occur"
},
{
"id": "TECH:F30",
"title": "Failure of Success Criterion 1.1.1 and 1.2.1 due to using text alternatives that are not alternatives (e.g., filenames or placeholder text)"
},
{
"id": "TECH:F38",
"title": "Failure of Success Criterion 1.1.1 due to not marking up decorative images in HTML in a way that allows assistive technology to ignore them"
},
{
"id": "TECH:F39",
"title": "Failure of Success Criterion 1.1.1 due to providing a text alternative that is not null (e.g., alt=\"spacer\" or alt=\"image\") for images that should be ignored by assistive technology"
},
{
"id": "TECH:F65",
"title": "Failure of Success Criterion 1.1.1 due to omitting the alt attribute or text alternative on img elements, area elements, and input elements of type \"image\""
},
{
"id": "TECH:F67",
"title": "Failure of Success Criterion 1.1.1 and 1.2.1 due to providing long descriptions for non-text content that does not serve the same purpose or does not present the same information"
},
{
"id": "TECH:F71",
"title": "Failure of Success Criterion 1.1.1 due to using text look-alikes to represent text without providing a text alternative"
},
{
"id": "TECH:F72",
"title": "Failure of Success Criterion 1.1.1 due to using ASCII art without providing a text alternative"
}
]
}
]
}
],
"techniques": []
},
{
"id": "WCAG2:time-based-media",
"alt_id": [
"media-equiv"
],
"num": "1.2",
"versions": [
"2.0",
"2.1",
"2.2"
],
"handle": "Time-based Media",
"title": "Provide alternatives for time-based media.",
"successcriteria": [
{
"id": "WCAG2:audio-only-and-video-only-prerecorded",
"alt_id": [
"media-equiv-av-only-alt"
],
"num": "1.2.1",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "A",
"handle": "Audio-only and Video-only (Prerecorded)",
"title": "For prerecorded audio-only and prerecorded video-only media, the following are true, except when the audio or video is a media alternative for text and is clearly labeled as such:",
"details": [
{
"type": "ulist",
"items": [
{
"handle": "Prerecorded Audio-only",
"text": "An alternative for time-based media is provided that presents equivalent information for prerecorded audio-only content."
},
{
"handle": "Prerecorded Video-only",
"text": "Either an alternative for time-based media or an audio track is provided that presents equivalent information for prerecorded video-only content."
}
]
}
],
"techniques": [
{
"sufficient": [
{
"situations": [
{
"title": "Situation A: If the content is prerecorded audio-only:",
"techniques": [
{
"id": "TECH:G158",
"title": "Providing an alternative for time-based media for audio-only content"
}
]
},
{
"title": "Situation B: If the content is prerecorded video-only:",
"techniques": [
{
"id": "TECH:G159",
"title": "Providing an alternative for time-based media for video-only content"
},
{
"id": "TECH:G166",
"title": "Providing audio that describes the important video content and describing it as such"
}
]
}
]
}
]
},
{
"advisory": [
{
"id": "TECH:H96",
"title": "Using the track element to provide audio descriptions"
}
]
},
{
"failure": [
{
"id": "TECH:F30",
"title": "Failure of Success Criterion 1.1.1 and 1.2.1 due to using text alternatives that are not alternatives (e.g., filenames or placeholder text)"
},
{
"id": "TECH:F67",
"title": "Failure of Success Criterion 1.1.1 and 1.2.1 due to providing long descriptions for non-text content that does not serve the same purpose or does not present the same information"
}
]
}
]
},
{
"id": "WCAG2:captions-prerecorded",
"alt_id": [
"media-equiv-captions"
],
"num": "1.2.2",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "A",
"handle": "Captions (Prerecorded)",
"title": "Captions are provided for all prerecorded audio content in synchronized media, except when the media is a media alternative for text and is clearly labeled as such.",
"techniques": [
{
"sufficient": [
{
"id": "TECH:G93",
"title": "Providing open (always visible) captions"
},
{
"id": "TECH:G87",
"title": "Providing closed captions"
},
{
"id": "TECH:G87",
"title": "Providing closed captions",
"using": [
{
"id": "TECH:SM11",
"title": "Providing captions through synchronized text streams in SMIL 1.0"
},
{
"id": "TECH:SM12",
"title": "Providing captions through synchronized text streams in SMIL 2.0"
},
{
"id": "TECH:H95",
"title": "Using the track element to provide captions"
}
]
}
]
},
{
"advisory": []
},
{
"failure": [
{
"id": "TECH:F8",
"title": "Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects"
},
{
"id": "TECH:F75",
"title": "Failure of Success Criterion 1.2.2 by providing synchronized media without captions when the synchronized media presents more information than is presented on the page"
},
{
"id": "TECH:F74",
"title": "Failure of Success Criterion 1.2.2 and 1.2.8 due to not labeling a synchronized media alternative to text as an alternative"
}
]
}
]
},
{
"id": "WCAG2:audio-description-or-media-alternative-prerecorded",
"alt_id": [
"media-equiv-audio-desc"
],
"num": "1.2.3",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "A",
"handle": "Audio Description or Media Alternative (Prerecorded)",
"title": "An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text and is clearly labeled as such.",
"techniques": [
{
"sufficient": [
{
"id": "TECH:G69",
"title": "Providing an alternative for time based media",
"using": [
{
"id": "TECH:G58",
"title": "Placing a link to the alternative for time-based media immediately next to the non-text content"
}
]
},
{
"id": "TECH:future-audio-description-or-media-alternative-prerecorded-1",
"title": "Linking to the alternative for time-based media using one of the following techniques",
"using": [
{
"id": "TECH:H53",
"title": "Using the body of the object element"
}
]
},
{
"id": "TECH:G78",
"title": "Providing a second, user-selectable, audio track that includes audio descriptions"
},
{
"id": "TECH:G173",
"title": "Providing a version of a movie with audio descriptions",
"using": [
{
"id": "TECH:SM6",
"title": "Providing audio description in SMIL 1.0"
},
{
"id": "TECH:SM7",
"title": "Providing audio description in SMIL 2.0"
},
{
"id": "TECH:future-audio-description-or-media-alternative-prerecorded-1",
"title": "Using any player that supports audio and video"
}
]
},
{
"id": "TECH:G8",
"title": "Providing a movie with extended audio descriptions",
"using": [
{
"id": "TECH:SM1",
"title": "Adding extended audio description in SMIL 1.0"
},
{
"id": "TECH:SM2",
"title": "Adding extended audio description in SMIL 2.0"
},
{
"id": "TECH:future-audio-description-or-media-alternative-prerecorded-1",
"title": "Using any player that supports audio and video"
}
]
},
{
"id": "TECH:G203",
"title": "Using a static text alternative to describe a talking head video"
}
]
},
{
"advisory": [
{
"id": "TECH:H96",
"title": "Using the track element to provide audio descriptions"
}
]
},
{
"failure": []
}
]
},
{
"id": "WCAG2:captions-live",
"alt_id": [
"media-equiv-real-time-captions"
],
"num": "1.2.4",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "AA",
"handle": "Captions (Live)",
"title": "Captions are provided for all live audio content in synchronized media.",
"techniques": [
{
"sufficient": [
{
"and": [
{
"id": "TECH:G9",
"title": "Creating captions for live synchronized media"
},
{
"id": "TECH:G93",
"title": "Providing open (always visible) captions"
}
]
},
{
"and": [
{
"id": "TECH:G9",
"title": "Creating captions for live synchronized media"
},
{
"id": "TECH:G87",
"title": "Providing closed captions"
}
]
},
{
"and": [
{
"id": "TECH:G9",
"title": "Creating captions for live synchronized media",
"using": [
{
"id": "TECH:SM11",
"title": "Providing captions through synchronized text streams in SMIL 1.0"
},
{
"id": "TECH:SM12",
"title": "Providing captions through synchronized text streams in SMIL 2.0"
}
]
},
{
"id": "TECH:G87",
"title": "Providing closed captions",
"using": [
{
"id": "TECH:SM11",
"title": "Providing captions through synchronized text streams in SMIL 1.0"
},
{
"id": "TECH:SM12",
"title": "Providing captions through synchronized text streams in SMIL 2.0"
}
]
}
]
}
]
},
{
"advisory": []
},
{
"failure": []
}
]
},
{
"id": "WCAG2:audio-description-prerecorded",
"alt_id": [
"media-equiv-audio-desc-only"
],
"num": "1.2.5",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "AA",
"handle": "Audio Description (Prerecorded)",
"title": "Audio description is provided for all prerecorded video content in synchronized media.",
"techniques": [
{
"sufficient": [
{
"id": "TECH:G78",
"title": "Providing a second, user-selectable, audio track that includes audio descriptions"
},
{
"id": "TECH:G173",
"title": "Providing a version of a movie with audio descriptions",
"using": [
{
"id": "TECH:SM6",
"title": "Providing audio description in SMIL 1.0"
},
{
"id": "TECH:SM7",
"title": "Providing audio description in SMIL 2.0"
},
{
"id": "TECH:future-audio-description-prerecorded-1",
"title": "Using any player that supports audio and video"
}
]
},
{
"id": "TECH:G8",
"title": "Providing a movie with extended audio descriptions",
"using": [
{
"id": "TECH:SM1",
"title": "Adding extended audio description in SMIL 1.0"
},
{
"id": "TECH:SM2",
"title": "Adding extended audio description in SMIL 2.0"
},
{
"id": "TECH:future-audio-description-prerecorded-1",
"title": "Using any player that supports audio and video"
}
]
},
{
"id": "TECH:G203",
"title": "Using a static text alternative to describe a talking head video"
}
]
},
{
"advisory": [
{
"id": "TECH:H96",
"title": "Using the track element to provide audio descriptions"
}
]
},
{
"failure": []
}
]
},
{
"id": "WCAG2:sign-language-prerecorded",
"alt_id": [
"media-equiv-sign"
],
"num": "1.2.6",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "AAA",
"handle": "Sign Language (Prerecorded)",
"title": "Sign language interpretation is provided for all prerecorded audio content in synchronized media.",
"techniques": [
{
"sufficient": [
{
"id": "TECH:G54",
"title": "Including a sign language interpreter in the video stream"
},
{
"id": "TECH:G81",
"title": "Providing a synchronized video of the sign language interpreter that can be displayed in a different viewport or overlaid on the image by the player",
"using": [
{
"id": "TECH:SM13",
"title": "Providing sign language interpretation through synchronized video streams in SMIL 1.0"
},
{
"id": "TECH:SM14",
"title": "Providing sign language interpretation through synchronized video streams in SMIL 2.0"
}
]
}
]
},
{
"advisory": []
},
{
"failure": []
}
]
},
{
"id": "WCAG2:extended-audio-description-prerecorded",
"alt_id": [
"media-equiv-extended-ad"
],
"num": "1.2.7",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "AAA",
"handle": "Extended Audio Description (Prerecorded)",
"title": "Where pauses in foreground audio are insufficient to allow audio descriptions to convey the sense of the video, extended audio description is provided for all prerecorded video content in synchronized media.",
"techniques": [
{
"sufficient": [
{
"id": "TECH:G8",
"title": "Providing a movie with extended audio descriptions",
"using": [
{
"id": "TECH:SM1",
"title": "Adding extended audio description in SMIL 1.0"
},
{
"id": "TECH:SM2",
"title": "Adding extended audio description in SMIL 2.0"
},
{
"id": "TECH:future-extended-audio-description-prerecorded-1",
"title": "Using any player that supports audio and video"
}
]
}
]
},
{
"advisory": [
{
"id": "TECH:H96",
"title": "Using the track element to provide audio descriptions"
}
]
},
{
"failure": []
}
]
},
{
"id": "WCAG2:media-alternative-prerecorded",
"alt_id": [
"media-equiv-text-doc"
],
"num": "1.2.8",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "AAA",
"handle": "Media Alternative (Prerecorded)",
"title": "An alternative for time-based media is provided for all prerecorded synchronized media and for all prerecorded video-only media.",
"techniques": [
{
"sufficient": [
{
"situations": [
{
"title": "Situation A: If the content is prerecorded synchronized media:",
"techniques": [
{
"id": "TECH:G69",
"title": "Providing an alternative for time based media",
"using": [
{
"id": "TECH:G58",
"title": "Placing a link to the alternative for time-based media immediately next to the non-text content"
}
]
},
{
"id": "TECH:future-media-alternative-prerecorded-1",
"title": "Linking to the alternative for time-based media using one of the following techniques",
"using": [
{
"id": "TECH:H53",
"title": "Using the body of the object element"
}
]
}
]
},
{
"title": "Situation B: If the content is prerecorded video-only:",
"techniques": [
{
"id": "TECH:G159",
"title": "Providing an alternative for time-based media for video-only content"
}
]
}
]
}
]
},
{
"advisory": []
},
{
"failure": [
{
"id": "TECH:F74",
"title": "Failure of Success Criterion 1.2.2 and 1.2.8 due to not labeling a synchronized media alternative to text as an alternative"
}
]
}
]
},
{
"id": "WCAG2:audio-only-live",
"alt_id": [
"media-equiv-live-audio-only"
],
"num": "1.2.9",
"versions": [
"2.0",
"2.1",
"2.2"
],
"level": "AAA",
"handle": "Audio-only (Live)",
"title": "An alternative for time-based media that presents equivalent information for live audio-only content is provided.",
"techniques": [
{
"sufficient": [
{
"id": "TECH:G151",
"title": "Providing a link to a text transcript of a prepared statement or script if the script is followed"
},
{
"id": "TECH:G150",
"title": "Providing text based alternatives for live audio-only content"
},
{
"id": "TECH:G157",
"title": "Incorporating a live audio captioning service into a Web page"
}
]
},
{
"advisory": []
},
{
"failure": []
}
]
}
],
"techniques": []
},
{
"id": "WCAG2:adaptable",
"alt_id": [
"content-structure-separation"
],
"num": "1.3",
"versions": [
"2.0",
"2.1",
"2.2"
],
"handle": "Adaptable",
"title": "Create content that can be presented in different ways (for example simpler layout) without losing information or structure.",