This is a draft document supplied by the WCAG Techniques Task Force. It in no way represents a WCAG Working Group consensus or agreement and is provided for informational and discussion purposes only. The accessibility test listed below should not be construed as required for conformance with the proposed WCAG2.

HTML Test Suite for WCAG 2.0
Test 152 - Long table header labels require terse substitutes.

W3C Editor's Draft 2005-08-11

Chris Ridpath, ATRC, University Of Toronto
Jenae Andershonis, Microsoft Inc.


This test case was created by the ATRC at the University Of Toronto. It should not be construed as required for conformance with the proposed WCAG2.

The complete list of tests may be found at http://www.w3.org/WAI/GL/WCAG20/tests/

Comments on this test may be made to the WCAG mailing list.

Status Of This Test

As part of the conformance test process, this test has a status of 'unconfirmed'.

WCAG2 Guideline

This test is not required for conformance to the current WCAG2. It is provided for discussion and informational purposes only.


There are no techniques related to this test.

Prerequisite Tests

There are no prerequisite tests for this test.

Test Process


  1. Check the contents of all th elements in the content.
  2. If the th element content is greater than 20 characters then check if there is an abbr attribute on the th element.
  3. Check if the abbr attribute value is an abbreviation for the th element content.

Expected Results

  1. Long TH labels must have a valid abbr attribute value.

Fail Instructions

  1. Add a valid abbr attribute value to the th element.

Pass Instructions

Any accessibility check may be performed after this test.

Language Specific

This test contains language specific directions and is dependent upon the language of the content. It may be applied only to content written in the following languages:

Language Specific Values
eng 20

Test Files

These test files contain examples of the accessibility problem detectable by this test. They may also contain more accessibility problems than the one described in this test. Please ignore any extraneous accessibility problems in these files.

Valid XHTML 1.0!