BETA release

L_03 Ordered list with correctly set ListNumbering attribute “Decimal”

PDF129, PASS

Use case(s): List

Last updated on November 20, 2025

Description

The objective of this technique is to show how to tag an ordered list (numbered list) and set the ListNumbering value correctly, in this case to "Decimal", because Arabic numbers are used to label each list item.

Download(s)

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

UA1_Tpdf-L_03.pdf

Test(s)

Expected Results

Checks #⁠1 through #⁠5 are all true.

Procedures

Check that all fundamental techniques are followed.
Check that all real content that the author intends as a list is tagged as a list.
Check that list tags are not used when the author does not intend a list.
Check that the substructures of all L tags are semantically appropriate (LI, Lbl, LBody).
Check that the ListNumbering attribute on all L tags in ordered lists is correctly set to "Decimal", "UpperRoman", "LowerRoman", "UpperAlpha" or "LowerAlpha".

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
16-003

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_03

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