- Class
- C3 Standard
- Weight
- 2
- Severity on fail
- minor
- Applies to
- the HTML Standard
Test this rule on a live site with the meta description checker. Free, no account needed.
Scope and evidence
Evaluated on page (P). The book marks this requirement STANDARD.
Fail conditions
Each condition has a stable code and a reason template. The evaluator fills the placeholders from observed values only; no sentence in a report is generated.
multiple{url} has {n} meta description elements. The HTML Standard allows only one per document.
The documented fix
Emit one description element from one field.
Sources, quoted
These are the passages the rule rests on, stored once in the knowledge base and emitted exactly as written. A citation marked for specific conditions appears only on findings with those codes.
“There must not be more than one meta element where the name attribute value is an ASCII case-insensitive match for description per document.”
[WHATWG-SEM] HTML Standard: 4.2 Document metadata (and 4.1 The document element) · Standard metadata names · last updated Living Standard
https://html.spec.whatwg.org/multipage/semantics.html