This decision tree describes how to use the alt attribute of the element in various situations. For some types of images, there are alternative approaches, such as using CSS background images for decorative images or web fonts instead of images of text.
This document provides a basis for subsequent work to identify gaps in current technologies, suggest strategies to improve accessibility for these user groups, and develop guidance and techniques for web authors.
The purpose of this combined glossary is to allow comparison of definitions, and potentially to provide a single glossary for all the accessibility guidelines. The various WAI working groups and individual readers of more than one guideline will benefit from a consistent use of terms.