What this test checks
The test checks whether the PDF document has valid bookmarks for navigation.
Why this maybe a barrier
Bookmarks (outlines) greatly help navigation by providing a hierarchical outline of the document to the reader, without having to read through all the pages. They provide a shortcut to understanding the document structure and reach important content quickly.
When a document has no bookmarks, users of assistive technologies lose a major navigational aid, creating a major accessibility barrier, especially for long or complex documents.
WCAG 2.2 Technique
This check is related to the WCAG 2.2 technique → PDF2: Creating bookmarks in PDF documents.
WCAG 2.2 Success Criterion
2.4.5 Multiple Ways (Level AA) — "More than one way is available to locate a Web page within a set of Web pages except where the Web Page is the result of, or a step in, a process."
For more information, visit WCAG 2.2 Success Criterion 2.4.5 under the guideline Navigable.
PDF/UA Principle
N.A (WCAG-only check)