BETA release

L_F03 Ordered list with missing ListNumbering attribute

PDF-F33, FAIL

Use case(s): List

Last updated on November 20, 2025

Description

This example demonstrates a failure condition that applies when an ordered list (numbered list) does not have a ListNumbering attribute.

In this case, the labels for the list items are Arabic numbers, therefore the ListNumbering attribute should be set to "Decimal".

If the ListNumbering attribute is not set assistive technology may misrepresent the list item labels to the user.

Download(s)

These minimal examples are designed to express a single Technique. Effective use requires software that supports Tagged PDF.

UA1_Tpdf-L_F03.pdf

Test(s)

Expected Results

Check #⁠1 is false.

Procedures

Check that the ListNumbering attribute on all L tags in ordered lists is correctly set to "Decimal".

Application to WCAG 2.x

This Technique addresses the following WCAG 2.x Success Critieria:

1.3.1 Info and Relationships

Matterhorn Protocol

The Matterhorn Protocol 1.1 provides an algorithm for conformance with PDF/UA-1. Matterhorn checkpoint(s) (human or machine) relevant to this use-case:

01-006
16-001
16-002

Accessibility Technique Support Finder

Accessibility Technique Support Finders allows you to quickly locate software and services that claim to support a given Technique. Simply search the internet with a given technique’s finder together with the name of your product.

The technique finder for this Technique is: UA1_Tpdf-L_F03

NOTE: the “technique support finder” concept was introduced in January 2025; please allow time for adoption.