PDF/UA-1 · CLAUSE 7.18.5
Link is not tagged or has no description
A link annotation is not tagged as a Link element with an object reference, or has no Contents entry describing where it goes.
Why it matters
Screen reader users listing links hear a raw URL or nothing meaningful, so they cannot tell links apart out of context.
How to fix it
- Tag links with a Link element containing both the link text and an OBJR reference to the annotation.
- Set the Contents entry to a short description of the link target.
- Write descriptive link text in the source document instead of 'click here' or a bare URL.
WCAG 2.4.4 Link Purpose (In Context) (A)
What the standard says
Links shall contain an alternate description via their Contents key as described in ISO 32000-1:2008, 14.9.3
Check your own PDF
Validate a file against PDF/UA-1 and see whether this rule fails in your document.
curl -sS -X POST "https://api.ua1.dev/api/validate?format=compact&profile=ua1" \ -F "file=@document.pdf"