How to Tag Lists Correctly in a PDF
Standards this affects
- PDF/UA — ISO 14289-1, clause 7.6 (lists)
- WCAG 2.1 — 1.3.1 Info and Relationships (Level A)
- Section 508 — 502 / WCAG 2.0 AA by reference
What this means
An accessible list uses a List (L) tag containing list items (LI), each with a label (Lbl) for the bullet/number and a list body (LBody) for the text. This tells assistive technology "this is a list of N items".
Why it matters
A screen reader announces a properly tagged list as "list with 5 items" and lets users navigate item by item. If bullets are just hyphens or numbers typed as plain paragraphs, that structure is lost and the content reads as disconnected lines.
How the checker flags it
- The checker reports list-structure or list-tag problems.
- List items are tagged as separate paragraphs (P) with literal "•" or "1." characters.
- A screen reader doesn't announce list boundaries or item counts.
How to fix it
- 1
Use real list formatting at the source
In Word, create lists with the bullet/numbering buttons rather than typing dashes or numbers manually, then export to PDF. The list tags come through automatically.
- 2
Retag lists in Acrobat Pro
In the Tags panel, wrap the items in an L tag, with each item as LI containing an Lbl (the bullet/number) and an LBody (the text). The Table/Tag editing tools help build this structure.
- 3
Check nested lists
Sub-lists should be nested inside the parent LBody so the hierarchy is preserved for screen reader users.
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Frequently asked questions
- Do simple two-item lists need list tags too?
- If it's presented as a list visually, tag it as a list. Consistent structure helps users and is required for PDF/UA. Very short inline series in a sentence don't need list tags.