Improving accessibility for your Plone sites

The present document does not try to summarize the WCAG (Web Content Accessibility Guidelines) but to emphasize the aspects that are often forgotten.

1. Alternative text in images Several techniques for including alt attribute in images in Plone
2. Descriptive links This document shows several examples with bad texts and suggestions to fix them
3. Use lists Those elements that are a related to each other (navigation, toolbars, etc.) should be grouped in well formed lists, preferable ordered lists.
4. Use headings Follow headings order properly
5. Tables with summary / caption This document shows several examples to include a table description
6. Page titles Page title must be descriptive enough and unique
7. Abbreviations and acronyms Use cases for acronym and abbr tags
8. Highlighting controls All elements capable of getting focus should be highlighted
9. Colours with enough contrast It should be enough contrast between foreground and background colors.
10. Use relative units Images and text size should be in relative units
11. Move styles to CSS All presentation attributes must be moved to linked external CSS
12. Automatic validation Code must validate to published formal grammars
13. References References

All content on one page (useful for printing, presentation mode etc.)