2.01.11 Text equivalents: Summary
The "alt text" should reflect the function of the image in relation to the content so:
- If the image has no meaning ie decorative:
- Use a null alt text e.g.
- If the image has only semantic meaning ie a rule, space or bullet:
- Use a null alt text as it's just more noise to a screen reader.
- If the image conveys the same meaning as written in the content text:
- Use the shortest description possible, to the point of being curt.
- Or use a null alt text if the image is not mentioned in the text.
- If the image adds meaning to the content:
- The alt text should succinctly reflect that additional meaning.
- If it is not possible in less than 65 characters link to a full description elsewhere.
- If the image is used as a heading:
- The alt text should directly reflect the text in the graphic and be placed in heading elements.
- Generally speaking:
- A null alt text is always better than no alt text at all.
- Requires a link to a text transcript.