Test Case sc1.1.1_l1_014: Alternative text for two nested objects with both image map and img element inside innermost object

Formal Metadata

Formal Metadata
TitleAlternative text for two nested objects with both image map and img element inside innermost object
DescriptionA document with an object element in an image map. The object element embeds an image in PNG format, and contains another object element that embeds the GIF version of the same image. This second object element contains an img element with the same GIF image, and the image map. The alt attribute of the img element identifies the image and conveys the same information. The object elements do not have a title attribute or any other text alternative except the alt attribute of the img element.
CreatorBenToWeb (Christophe.Strobbe@…)
RightsCopyright BenToWeb 2005-2007
LanguageEnglish
Date2005-08-26
Statusaccepted QA

Technologies and Features

Technologies are markup languages or data formats. If the technology is a markup language, “features” refers to elements and attributes.

XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)

XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)

Feature: img (namespace: http://www.w3.org/1999/xhtml) .

Technical specification: How to specify alternate text .

Feature: object (namespace: http://www.w3.org/1999/xhtml) .

Technical specification: General Inclusion: The object element .

Feature: map (namespace: http://www.w3.org/1999/xhtml) .

Technical specification: How to create client-side image maps .

Feature: area (namespace: http://www.w3.org/1999/xhtml) .

Technical specification: Client-side image maps: the map and area elements .

Test Data

Purpose

This test case is intended to pass because the image has an appropriate text alternative in the img element that serves as a fallback for the innermost object element. However, browser support for the object element may determine if this test case is accessible or not. Internet Explorer (version 6 or earlier) has weak or no support for the object element. Only the image itself is tested, not the image map.

Test Modes

Accessibility expert.

Test Files

Test file.

TCDL Data

sc1.1.1_l1_014 (XML).

Rules

“Rules” refer to success criteria in WCAG 2.0, checkpoints in WCAG 1.0 and similar requirements.

Primary Rules

The test case fails the following success criterion at line 16, column 7: http://www.w3.org/TR/2006/WD-WCAG20-20060427/guidelines.html#text-equiv-all.

Functional Outcome

The image has a fallback with a text description. User testing with screen reader users provided the following results: most users of speech output could understand the image, but most users (3 out of 4) of a Braille display could not. (All were users of Internet Explorer 6 or 7.)

Technical Comment

The object element has an img element with an alt attribute as a fallback . Since there is no direct text alternative, it is not entirely clear if this code is accessible.

This test case is identical to sc1.1.1_l1_013, except that the map is now inside the innermost object element.

(In Mozilla 1.7.3 and Firefox 1.0, the map does not work if the map element has only an id and no name attribute.)

(Internet Explorer 6.0 does not support object and does not display the fallback image if it is inside a nested object - tested on both Windows 2000 and Windows XP Professional.)

Secondary Rules

Secondary Rule (WCAG 2.0 - June 2005 Working Draft)

The test case needs review before it can be established if it passes or fails the following success criterion: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#text-equiv-informative. The code that causes doubt can be found at line 16, column 7.

Functional Outcome

The image has a fallback with a text description.

Technical Comment

The object element has an img element with an alt attribute as a fallback . Since there is no direct text alternative, it is not entirely clear if this code is accessible.

This test case is identical to xhtml1_wcag2_20050630_1.1_l1_sc1_013, except that the map is now inside the innermost object element.

(In Mozilla 1.7.3 and Firefox 1.0, the map does not work if the map element has only an id and no name attribute.)

(Internet Explorer does not support object and does not display the fallback image if it is inside a nested object.)