Web Accessibility Checker : Check Details

Element

Error Type

Likely

Guidelines

BITV 1.0 (Level 2)
Level 1
1.4 For any time-based multimedia presentation (e.g., a movie or animation), synchronize equivalent alternatives (e.g., captions or auditory descriptions of the visual track) with the presentation.
Stanca Act
Requirement 18: Synchronized Text Equivalents For Multimedia
WCAG 1.0 (Level A)
Priority 1
1.4 For any time-based multimedia presentation (e.g., a movie or animation), synchronize equivalent alternatives (e.g., captions or auditory descriptions of the visual track) with the presentation.
WCAG 1.0 (Level AA)
Priority 1
1.4 For any time-based multimedia presentation (e.g., a movie or animation), synchronize equivalent alternatives (e.g., captions or auditory descriptions of the visual track) with the presentation.
WCAG 1.0 (Level AAA)
Priority 1
1.4 For any time-based multimedia presentation (e.g., a movie or animation), synchronize equivalent alternatives (e.g., captions or auditory descriptions of the visual track) with the presentation.
WCAG 2.0 (Level A)
1.2 Provide synchronized alternatives for multimedia
Success Criteria 1.2.1 Audio-only and Video-only (Prerecorded) (A)
WCAG 2.0 (Level AA)
1.2 Time-based Media: Provide alternatives for time-based media.
Success Criteria 1.2.1 Audio-only and Video-only (Prerecorded) (A)
WCAG 2.0 (Level AAA)
1.2 Time-based Media: Provide alternatives for time-based media
Success Criteria 1.2.1 Audio-only and Video-only (Prerecorded) (A)

Requirement

Links to multimedia have a link to text alternative.

Error

Link to multimedia may be missing a link to text alternative.

Short Description

This error will be generated for each a (anchor) element that contains an href attribute value ending with (case insensitive): .wmv, .mpg, .mov, .ram, .aif.

How To Determine

Question	Does this link to a multimedia file have a link to a text alternative?
PASS	Link to multimedia file has a link to a text alternative.
FAIL	Link to multimedia file does not have a link to a text alternative.

Steps To Check

Procedure

1. Check each a (anchor) element in the content.
2. Check the href attribute value for a multimedia file extension.
3. Common multimedia file extensions are .wmv, .mpg, .mov, .ram, and .aif.
4. If the document contains a link to a multimedia file, then check for a link to a text alternative.
5. The link to the text alternative must be immediately before or immediately after the link to the multimedia file.

Expected Result

1. Links to multimedia have a link to text alternative.

Failed Result

1. Add a link to a text alternative immediately before or immediately after the link to the multimedia file.

Examples

Pass Examples

Link to multimedia file also has link to text alternative.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=UTF-8" />
<title>ATRC Testfile - Check #145.2 - Negative</title>
</head>
<body>
<p>View <a href="movie.wav">the movie</a> <a href="alternative.html">(text alternative)</a>.</p>
</body>
</html>

Fail Examples

Link to multimedia file (.wmv) without a text alternative.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=UTF-8" />
<title>ATRC Testfile - Check #145.1 - Positive</title>
</head>
<body>
<p>View <a href="movie.wmv">the movie</a>.</p>
</body>
</html>