Validity error: illegal attribute

An XHTML file that is well-formed but not valid because the dd elements have an alt attribute, which is not allowed on these elements. It cannot be predicted how assistive technology responds to this; possibly, the alt attributes will be ignored. Validity error: illegal attribute Christophe.Strobbe@esat.kuleuven.be en Copyright BenToWeb 2005-2007 2005-10-05 accepted QA XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition) Strictly Conforming Documents

This test case is intended to pass.

oneExpert

How many definitions of abbreviation are given?

Hoeveel definities van 'afkorting' worden er gegeven?

one een -1 two twee 1 three drie -2 four vier -3 blindness low vision

How many definitions of abbreviation are given?

Hoeveel definities van 'afkorting' worden er gegeven?

one een -1 two twee 1 three drie -2 four vier -3 blindness

How many definitions of abbreviation are given?

Hoeveel definities van 'afkorting' worden er gegeven?

one een -1 two twee 1 three drie -2 four vier -3 low vision

The document is not valid: the alt attributes on the definitions may cause problems.