Introduction: visual user view

	Marja-Riitta Koivunen Research Scientist MIT/LCS

Slides available at:
http://www.w3.org/2002/Talks/swandwai/

Introduction: nonvisual user view

	Marja-Riitta Koivunen Research Scientist MIT/LCS

Why important?

• ~10-20% of population disabled
• aging populations
• supports also mobile users etc
• accessibility requirements e.g. EU

Introduction: nonvisual user view with alt text

	Marja-Riitta Koivunen Research Scientist MIT/LCS

Introduction: machine view with or without alt text

Why important?

• exact vocabularies
• merge metadata from several sources
• better search results
• automatization

"The bane of my existence is doing things that I know the computer could do for me." -- Dan Connolly, The XML Revolution

Introduction: machine view with metadata

Contents

• Introduction ^v
• Web Accessibility Initiative
  • Web Content Accessibility Guidelines (WCAG)
  • Homework 1,2
• Semantic Web Activity
  • SWAD Examples
  • Homework 3

Web Accessibility Initiative (WAI)

• Accessibility Guidelines WG for:
  • Web Content
  • Authoring Tools
  • User Agent
• Technical WG for W3C standards:
  • Guidelines for XML (XAG)
• Education and Outreach WG
• Research & Development WG

WCAG theme 1: Graceful transformation

WCAG Guidelines 1-11

1. Provide equivalent alternatives to auditory and visual content.
2. Don't rely on color alone.
3. Use markup and style sheets and do so properly.
4. Clarify natural language usage.
5. Create tables that transform gracefully.
6. Ensure that pages featuring new technologies transform gracefully.
7. Ensure user control of time-sensitive content changes.
8. Ensure direct accessibility of embedded user interfaces.
9. Design for device-independence.
10. Use interim solutions.
11. Use W3C technologies and guidelines.

WCAG theme 2: Understandable and navigable content

WCAG Guidelines 12-14

12. Provide context and orientation information.
13. Provide clear navigation mechanisms.
14. Ensure that documents are clear and simple.

Homework 1: Validate content

W3C HTML Validator W3C CSS Validator HTML Tidy correcting mark-up Amaya editor/browser creating valid content (save frequently).

Homework 2: Check accessibility

Apply WCAG checklist. Try out WCAG 1.0 evaluation tools e.g. Bobby. Examine WCAG 1.0 guidelines Learn more from WCAG 1.0 Curriculum

Semantic Web (SW) Activity

Technology and Society Domain Basic technologies: RDF Core WG Web Ontology WG Experiments & prototypes SWAD Education and outreach

Semantic Web - Layers

Main SW principles

Anything can have a URI:

Resources and links have types:

SWELL example: Chain of trust

Zakim: meeting bot

http://www.w3.org/2001/12/zakim-irc-bot

Annotea: shared annotations

http://www.w3.org/2001/Annotea

Annotea: sample UI

Homework 3: Use metadata

• Dublin Core for documents
• RSS for news
• define your own RDF schemas
• examine sample SWAD applications

The END