This Quick Reference is currently customized to include:
Controls, Input: If it is a control or accepts user input, then it has a name that describes its purpose. (See also Guideline 4.1.)
Media, Test, Sensory: If it is (1) synchronized media, (2) live audio-only or live video-only content, (3) a test or exercise that must be presented in non-text format, (4) primarily intended to create a specific sensory experience, then text alternatives at least provide descriptive identification of the non-text content , or (5) a media alternative to text that is clearly labeled as such . (For synchronized media, see also Guideline 1.2.)
Note: Prerecorded audio-only and video-only files would be covered under Success Criterion 1.1.1, which requires text alternatives that present equivalent information.
CAPTCHA: If it 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.
Decoration, Formatting, Invisible: If it is pure decoration, or used only for visual formatting, or if it is not presented to users, then it is implemented in a way that it can be ignored by assistive technology.
G94: Providing short text alternative for non-text content that serves the same purpose and presents the same information as the non-text content using a short text alternative technique listed below
G95: Providing short text alternatives that provide a brief description of the non-text content using a short text alternative technique listed below AND one of the following techniques for long description:
G92: Providing long description for non-text content that serves the same purpose and presents the same information using a long text alternative technique listed below
G82: Providing a text alternative that identifies the purpose of the non-text content using a short text alternative technique listed below
Using HTML form controls and links (future link)
H44: Using label elements to associate text labels with form controls (HTML)
H65: Using the title attribute to identify form controls when the label element cannot be used (HTML)
Using (X)HTML according to spec (future link)
Providing a descriptive label using a short text alternative technique listed below
G68: Providing a descriptive label that describes the purpose of live audio-only and live video-only content using a short text alternative technique listed below
G100: Providing the accepted name or a descriptive name of the non-text content using a short text alternative technique listed below
G143: Providing a text alternative that describes the purpose of the CAPTCHA AND G144: Ensuring that the Web Page contains another CAPTCHA serving the same purpose using a different modality
Implementing or marking the non-text content so that it will be ignored by assistive technology using one of the technology-specific techniques listed below
H36: Using alt attributes on images used as submit buttons (HTML)
H2: Combining adjacent image and text links for the same resource (HTML)
H24: Providing text alternatives for the area elements of image maps (HTML)
Providing text alternatives for strings where look-alike glyphs are used in place of letters (e.g. leetspeak) (future link)
Providing text alternatives for ASCII art (future link)
H45: Using longdesc (HTML)
Identifying informative non-text content (future link)
Keeping short descriptions short (future link)
Describing images that include text (future link)
Providing a longer description of the non-text content where only a descriptive label is required using a technology-specific technique (for an accessibility-supported content technology) for long description listed above (future link)
Providing different sizes for non-text content when it cannot have an equivalent accessible alternative (future link)
Using server-side scripts to resize images of text (future link)
Linking to textual information that provides comparable information (e.g. for a traffic Webcam, a municipality could provide a link to the text traffic report.) (future link)
Providing a transcript of a live audio only presentation after the fact (future link)
Providing more than two modalities of CAPTCHAs (future link)
Providing access to a human customer service representative who can bypass CAPTCHA (future link)
Not requiring CAPTCHAs for authorized users (future link)
Writing for browsers that do not support frame
Providing alternative content for iframe
H27: Providing text and non-text alternatives for object (HTML)
Not using long descriptions for iframe
Providing redundant text links for client-side image maps (future link)
Using CSS margin and padding rules instead of spacer images (future link)
Using CSS background, :before or :after rules for decorative images instead of img elements (future link)
Displaying empty table cells (future link)
Using the ARIA presentation role to indicate elements are purely presentational (future link)
Using metadata to associate text transcriptions with a video (future link)
Using metadata to associate text transcriptions with audio-only content (future link)
EXAMPLE: Providing, in metadata, URL(s) that points to an audio description and a text transcript of a video.
EXAMPLE: Providing, in metadata, URL(s) that point to several text transcripts (English, French, Dutch) of an audio file.
Providing a viewport to a live text service which is being created by a trained stenographer who transcribes the spoken audio with minimal errors (future link)
Providing a link to a text transcript of a prepared statement or script if the script is followed (future link)
G150: Providing text alternatives for live audio-only content
Using metadata to associate text transcriptions with audio-only content (future link)
EXAMPLE: Providing, in metadata, URL(s) that point to several text transcripts (English, French, Dutch) of an audio file.
