UA1 Validator / PDF/UA-1 rules / 7.9-1

PDF/UA-1 · CLAUSE 7.9

Footnote or endnote is missing a unique ID

A Note tag has no ID entry, or two Note tags share the same ID.

Rule 7.9-1 ISO 14289-1 Object: SENote

Why it matters

Assistive technology cannot reliably associate a reference in the text with its note, so users lose the link between the two.

How to fix it

  • Give every Note element a unique ID value in the structure element properties.
  • Link references to notes using Reference elements pointing at those IDs.
  • Generate footnotes with the source application's footnote feature rather than manual superscripts.
WCAG 1.3.1 Info and Relationships (A)

What the standard says

Note tag shall have ID entry

Check your own PDF

Validate a file against PDF/UA-1 and see whether this rule fails in your document.

Open the validator Automate in CI 
curl -sS -X POST "https://api.ua1.dev/api/validate?format=compact&profile=ua1" \
  -F "file=@document.pdf"