Principle 4 Robust · Guideline 4.1: Compatible
4.1.1 Parsing (removed)
Removed in WCAG 2.2 – modern browsers recover from malformed markup.
What this means in practice
This criterion required well-formed HTML (unique IDs, correct nesting). It is obsolete as of WCAG 2.2 because browsers and assistive technology now cope. Clean markup still matters – duplicate IDs break the label-to-field association, for one.
Normative wording
The binding text lives at the W3C. What you read here is our own faithful rendering – not a quotation.