W3C WAI Images Tutorial
Practical guidance for creating useful alt attribute content for images, including references to relevant WCAG 2.0 Success Criteria and techniques, longdesc and WAI-ARIA information.
The tutorial includes a simple decision tree, an easy to use algorithm for determining the most appropriate alternative text for any given context.
Understanding Success Criteria 1.1.1 (Non-text Content)
WCAG 2.0 requirements for alternative text that includes techniques for meeting this Success Criteria.
The Web Content Accessibility Guidelines (WCAG) 2.0 is a comprehensive set of recommendations for making content accessible to a broad range of people with disabilities. Guideline 1.1.1 covers the accessibility of all Non-text Content, including images, form controls, media and sensory content.
How to Meet WCAG 2.0 - Text alternatives
A quick reference guide to satisfying the requirements of WCAG 2.0 as it applies to text alternatives.
The How to Meet WCAG 2.0 document is a useful tool for systematically verifying that your document satisfies WCAG 2.0 Success Criteria.
HTML5 - Requirements for providing text to act as an alternative for images
The section of the HTML5 specification that addresses the authoring of useful alt attribute content.
Designed to address the immediate needs of web authors who primarily refer to technical specifications for guidance.