a holistic framework for web accessibility
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http://www.ukoln.ac.uk/web-focus/events/meetings/bsi-accessibility-2006-01/. A Holistic Framework For Web Accessibility. About This Talk - PowerPoint PPT PresentationTRANSCRIPT
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A Holistic Framework For Web AccessibilityBrian KellyUKOLNUniversity of BathBath
UKOLN is supported by:
http://www.ukoln.ac.uk/web-focus/events/meetings/bsi-accessibility-2006-01/http://www.ukoln.ac.uk/web-focus/events/meetings/bsi-accessibility-2006-01/
About This TalkThis talk describes a holistic framework to Web accessibility which provides a user-focused approach to accessibility which provides a context for use of WAI WCAG guidelines which recognises embraces diversity rather than mandates conformity
About This TalkThis talk describes a holistic framework to Web accessibility which provides a user-focused approach to accessibility which provides a context for use of WAI WCAG guidelines which recognises embraces diversity rather than mandates conformity
A centre of expertise in digital information management
www.ukoln.ac.uk
2
Contents
• Shared Assumptions• WAI Limitations• Holistic Framework• Tangram Model• Questions
A centre of expertise in digital information management
www.ukoln.ac.uk
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Common Assumptions (1)
Things we should have in common:• A desire to see widely-accessible and
interoperable services• Use of open standards to provide platform
and application-independent services• A recognition of the challenges faced in
achieving these aims (funding, time scales, expertise, user requirements, …)
• A desire to provide advice on how to achieve the aims whilst acknowledging the challenges
Slide used at Accessibility Summit, TechDis, in Feb 2002Slide used at Accessibility Summit, TechDis, in Feb 2002
A centre of expertise in digital information management
www.ukoln.ac.uk
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Common Assumptions (2)
We also recognise that:• The W3C is the authoritative body which
is driving the development of Web standards
• W3C WAI has driven the agenda for Web accessibility
• W3C WAI has been successful in raising awareness globally that: Digital resources can be made accessible Digital resources should be made accessible
Slide used at Accessibility Summit, TechDis, in Feb 2002Slide used at Accessibility Summit, TechDis, in Feb 2002
A centre of expertise in digital information management
www.ukoln.ac.uk
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Problems
Guidelines • WAI model is flawed (see [1])• WCAG guidelines have flaws• Problems with change control (WCAG 1.0 2.0)
Other Developments • Accessibility issues being addressed elsewhere
(formats, applications, OSs, metadata, …)
Context • Need to address diversity and seek wider
participation rather than impose universal solutions
1 Further information provided in "Forcing Standardization or Accommodating Diversity? A Framework for Applying the WCAG in the Real World ", W4A, Japan, 2005
1 Further information provided in "Forcing Standardization or Accommodating Diversity? A Framework for Applying the WCAG in the Real World ", W4A, Japan, 2005
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Solutions
Holistic framework for e-learning accessibility published in CJLT (2004):
UsersNeeds
• Focuses on the userand recognises importance of:
• External pressures e.g. funders, QAA, …
• Technical infrastructure • Resource implications• Learning & teaching outcomes
and requires quality assurance based on documented policies and systematic checking
Follow-up work awarded prize for Best Research Paper at ALT-C 2005 E-learning conference
Follow-up work awarded prize for Best Research Paper at ALT-C 2005 E-learning conference
Importance of blended learning
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Building On This Work
Current work:• Develop general framework for addressing
Web accessibility• Build on existing best practices• Allows for diversity:
User environments Technical developments (within W3C, other IT
developments, other technologies e.g. Podcasting, mobile phones, …)
Context of use (information, learning, culture, …) Blended accessibility• Personalised solutions
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Tangram Model (1)
Generic model:• W3C model has severe
limitations
WCAG
Usability
Flash OS …
• Jigsaw model implies single solution
• Tangram model encourages diversity of solutions
This approach:• Encourages diversity
of solutions• Focus on 'pleasure' it
provides to user
This approach:• Encourages diversity
of solutions• Focus on 'pleasure' it
provides to user
A centre of expertise in digital information management
www.ukoln.ac.uk
9
Tangram Model (2)
Guidelines/standards for/from:
• WAI• Usability• Organisational• Dyslexic • Learning difficulties• Legal• Management
(resources, …)• Interoperability• Accessibility
metadata
Model allows us to:• Focuses on end solution rather
than individual components• Provided solutions tailored for
end user• Doesn't limit scope (can you do
better than WAI AAA?)• Make use of automated
checking – but ensures emphasis is on user satisfaction
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Relevance To Accessibility MetadataThis approach:
• Based on principle of "widening participation" rather than "universal accessibility"
• Acknowledges that there may be tensions and conflicts
• Provides a bigger picture for user and developer communities
• Puts WAI guidelines within the context of a bigger picture
• Shows how accessibility metadata relates to a bigger picture
• Is itself an example of a personalised / blended solution
A centre of expertise in digital information management
www.ukoln.ac.uk
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Discussion
Questions., comments, etc. welcome