| In General (Priority 1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
1.1  Provide
a text equivalent for every non-text element (e.g., via "alt", "longdesc",
or in element content). This includes: images, graphical representations
of text (including symbols), image map regions, animations (e.g., animated
GIFs), applets and programmatic objects, ascii
art, frames, scripts, images used as list bullets, spacers, graphical
buttons, sounds (played with or without user interaction), stand-alone
audio files, audio tracks of video, and video.
| |||||||||
| 2.1 Ensure that all information conveyed with color is also available without color, for example from context or markup. | |||||||||
|
The first example uses color to highlight the preferred choice for those who can perceive it, and an ordered list to identify the preferred choice for people who cannot see colors. Don't use color to convey information unless the information is also clear from the markup and/or text. Without color, the following example is meaningless. (This example is intentionally colorless to show the author that if the person visiting their page cannot see color, they will miss the point the author is trying to make.)
| |||||||||
|
| |||||||||
|
4.1 Clearly identify changes in the natural language of a document's text and any text equivalents (e.g., captions). The code might appear as: <img src="mountlemmon.jpg"
alt="Smoke billows from the top of Mount Lemmon near Tucson,
Arizona, as a wildfire rages Sunday." width="220"
height="324"> | 
| ||||||||
| 6.1 Organize documents so they may be read without style sheets. For example, when an HTML document is rendered without associated style sheets, it must still be possible to read the document. (Example) | |||||||||
| 6.2 Ensure that equivalents for dynamic content are updated when the dynamic content changes. (Example) | |||||||||
| 7.1 Until user agents allow users to control flickering, avoid causing the screen to flicker. (Example) | |||||||||
| 14.1 Use the clearest and simplest language appropriate for a site's content. (Example) | |||||||||
| And if you use images and image maps (Priority 1) | |||||||||
| 1.2 Provide redundant text links for each active region of a server-side image map. (Example) | |||||||||
| 9.1 Provide client-side image maps instead of server-side image maps except where the regions cannot be defined with an available geometric shape. (Example) | |||||||||
| And if you use tables (Priority 1) | |||||||||
| 5.1 For data tables, identify row and column headers. (Example) | |||||||||
| 5.2 For data tables that have two or more logical levels of row or column headers, use markup to associate data cells and header cells. (Example) | |||||||||
| And if you use frames (Priority 1) | |||||||||
| 12.1 Title each frame to facilitate frame identification and navigation. (Example) | |||||||||
| And if you use applets and scripts (Priority 1) | |||||||||
| 6.3 Ensure that pages are usable when scripts, applets, or other programmatic objects are turned off or not supported. If this is not possible, provide equivalent information on an alternative accessible page. (Example) | |||||||||
| And if you use multimedia (Priority 1) | |||||||||
| 1.3 Until user agents can automatically read aloud the text equivalent of a visual track, provide an auditory description of the important information of the visual track of a multimedia presentation. (Example) | |||||||||
| 1.4 For any time-based multimedia presentation (e.g., a movie or animation), synchronize equivalent alternatives (e.g., captions or auditory descriptions of the visual track) with the presentation. (Example) | |||||||||
| And if all else fails (Priority 1) | |||||||||
| 11.4 If, after best efforts, you cannot create an accessible page, provide a link to an alternative page that uses W3C technologies, is accessible, has equivalent information (or functionality), and is updated as often as the inaccessible (original) page. (Example) | |||||||||
