Principle 1 Perceivable · Guideline 1.1: Text Alternatives
1.1.1 Non-text Content
Anything that is not text needs a text alternative – images, icons, charts, controls.
What this means in practice
Every image needs an alt attribute. If it carries information, describe that information; if it is purely decorative, leave it empty (alt="") so screen readers skip it. A file name is not a description. For charts, put the message into text, not the appearance.
What Wave Access contributes
Wave Access ergänzt fehlende Alt-Texte aus der Mediathek im ausgelieferten HTML, kennzeichnet rein dekorative Bilder sauber als solche und listet im Backend alle Bilder ohne Beschreibung auf.
Normative wording
The binding text lives at the W3C. What you read here is our own faithful rendering – not a quotation.