World Wide Web Consortium  Web Accessibility Initiative
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Authoring and rendering

specific example for alternative text on images which is a requirements by the Web Content Accessibility Guidelines 1.0. Web developers provide text alternatives for the images using authoring tools. The HTML specification provides a mechanism to supplement images with such text. Finally, this redundant coding is used by browsers and assistive technology to convey the information to the end users according to their preferences, for example visually, through voice synthesis, or in form of text.

Shadi Abou-Zahra

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