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pythonhtp1_25.fm Page 1109 Wednesday, August 29, 2001 3:08 PM Objectives 25 Accessibility • To introduce the World Wide Web Consortium’s Web Content Accessibility Guidelines 1.0 (WCAG 1.0). To understand how to use the alt attribute of the tag to describe images to people with visual impairments, mobile-Web-device users, search engines, etc. To understand how to make XHTML tables more accessible to page readers. To understand how to verify that XHTML tags are used properly and to ensure that Web pages are viewable on any type of display or reader. To understand how VoiceXML and CallXML are changing the way people with disabilities access information on the Web. To introduce the various accessibility aids offered in Windows 2000. ’Tis the good reader that makes the good book... Ralph Waldo Emerson © Copyright 1992–2002 by Deitel & Associates, Inc. All Rights Reserved. 8/29/01
pythonhtp1_25.fm Page 1110 Wednesday, August 29, 2001 3:08 PM 1110 Accessibility Chapter 25 Outline 25.1 Introduction 25.2 Web Accessibility 25.3 Web Accessibility Initiative 25.4 Providing Alternatives for Images 25.5 Maximizing Readability by Focusing on Structure 25.6 Accessibility in XHTML Tables 25.7 Accessibility in XHTML Frames 25.8 Accessibility in XML 25.9 Using Voice Synthesis and Recognition with VoiceXML 25.10 CallXML 25.11 JAWS® for Windows 25.12 Other Accessibility Tools 25.13 Accessibility in Microsoft® Windows® 2000 25.13.1 Tools for People with Visual Impairments 25.13.2 Tools for People with Hearing Impairments 25.13.3 Tools for Users Who Have Difficulty Using the Keyboard 25.13.4 Microsoft Narrator 25.13.5 Microsoft On-Screen Keyboard 25.13.6 Accessibility Features in Microsoft Internet Explorer 5.5 25.14 Internet and World Wide Web Resources Summary Terminology Self-Review Exercises Answers to Self-Review Exercises Exercises 25.1 Introduction Enabling a Web site to meet the needs of individuals with disabilities is a concern for all businesses. People with disabilities are a significant portion of the population, and legal ramifications exist for Web sites that discriminate by not providing adequate and universal access to their resources. In this chapter, we explore the Web Accessibility Initiative, its guidelines, various laws regarding businesses and their availability to people with disabilities and how some companies have developed systems, products and services to meet the needs of this demographic. 25.2 Web Accessibility In 1999, the National Federation for the Blind (NFB) filed a lawsuit against America On Line (AOL) for not supplying access to its services for people with visual disabilities. The Americans with Disabilities Act (ADA) and many other efforts address Web accessibility laws (Fig. 25.1). © Copyright 1992–2002 by Deitel & Associates, Inc. All Rights Reserved. 8/29/01
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746 Multithreading Chapter 19 Outli
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2 Index shared region of memory 753
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Index 1 A accept method 764 accepti
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Objectives 22 Data Structures • T
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