Website Accessibility

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Transcript Website Accessibility

Issues related to the development
of accessible web sites
Dr Siyat Abdi
3 February 2015
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Rationale:
• Non-discrimination on basis of disability in programs and services receiving State
and Federal money.
• All Electronic &Information Technology (E&IT) developed, procured, maintained, or
used must be accessible.
• Organisations and service providers to ensure that Alternative means of access is
available when accessibility cannot be achieved.
• Adhere to the World Wide Web Consortium (W3C) Web Content Accessibility
Guidelines
http://www.w3.org/TR/WAI-WEBCONTENT
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Why You Need to Care About Accessibility
Barriers to Access :
• Visual • Auditory • Mobility
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Visual Disabilities:
• Blindness
• Weak vision
• Tunnel vision
• Dimness
• Extreme near- or far-sighted
• Color blindness
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Hearing Disabilities:
• Deaf
• Hard of hearing
• High/low frequency hearing loss
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Benefits of Accessible Design:
Accessible design benefits everyone!
• Older technology
• Slow connection speeds
• Newer wireless technology
• Personal preference
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Specifications for Developing Accessible Web Pages
Color:
• Don’t rely on color alone to convey meaning
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Images and animations:
• Use the ALT (alternate text)
attribute for all graphics
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Multimedia:
• For audio - provide transcript
• For video - provide transcript and closed captioning
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Hypertext links:
• Make sure that links make sense out of context (avoid “click
here”)
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Page organization:
• Use headings (H1 - H6) - be consistent
• Use lists where possible
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Scripts, applets & plug-ins:
• If you use them, they must be accessible or provided in
alternate way
• If you use a plug-in:
• Choose one that is accessible
• Provide adequate instructions for downloading and installing
it
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Adobe PDF Files:
• PDF files can be inaccessible
• PDF becoming accessible?
• http://access.adobe.com
• Users can obtain a converted PDF file
via e-mail or a utility
• Convert PDF to HTML or text
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Provision of Equivalent Pages:
A text-only page, with equivalent information
or functionality, shall be provided to make a
Web site comply with the provisions of this
part, when compliance cannot be
accomplished in any other way.
The content of the text-only page shall be
updated whenever the primary page changes.
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Browsers Designed for Persons with Disabilities
• Complete keyboard control
• Speech synthesis
• Screen magnification
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Testing Your Site: Format
• Turn all the images off
• Turn off style sheets
• Use the largest custom font size
• Resize the browser window
• Select all text and copy it into a
word processor
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Testing Your Site: Navigation
• Navigate using only the keyboard
• Press Tab to move through the links
• Does the link text tell you where the link will take
you?
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Testing Your Site: Media
• Turn off sounds
• Disable all applets and scripts
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Testing Your Site: Color Scheme
• View the page on a monitor set to black & white
resolution
• Print the page on a black & white printer
• Set a color monitor to high contrast
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