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Alternative text Text that provides the same essential information as an image in an article, provided by the alt attribute, image caption, and sometimes the body text. [6] Alt attribute The HTML attribute used on webpages to specify alternative text to be displayed in place of an element that cannot be rendered. [12] Alt parameter
Alternative text (or alt text) is text associated with an image that serves the same purpose and conveys the same essential information as the image. [1] In situations where the image is not available to the reader, perhaps because they have turned off images in their web browser or are using a screen reader due to a visual impairment, the alternative text ensures that no information or ...
This aids hearing-impaired and deaf people and provides a way for non-native language speakers to understand the content in a multimedia file and should be included for all videos with a meaningful audio component. Closed captions provide a text version of all important information provided through the sound.
The WCAG guideline is "Provide text alternatives for any non-text content". It later qualifies this "text alternative" as needing to "serve the same purpose and present the same information". The nutshell is currently Provide a text alternative for images that serves the same purpose and presents the same context‑relevant information.
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A text-based web browser such as Lynx will display the alt text instead of the image (or will display the value attribute if the image is a clickable button). [13] A graphical browser typically will display only the image, and will display the alt text only if the user views the image's properties, or has configured the browser not to display ...
The approach to make Wikipedia accessible is based on the W3C's official WCAG 2.0 (a.k.a. ISO/IEC 40500:2012) and ATAG 2.0 guidelines. The guidelines provided by this accessibility project are merely an attempt to reword the WCAG 2.0 into a guideline hopefully easier to understand for editors who are not familiar with accessibility or web development.
Unless the alt text provides a pixel-by-pixel description of the image, the above statement, taken from the introductory paragraph, is simply not possible. A description can serve the same general purpose as the image, but it is not technically accurate to say that it conveys the same information. In addition, having no images, whether because ...