IDRC - Celebrating 25 Years

1993 - 2018

Continuing Our Work During COVID-19

Read the letter regarding COVID-19 by IDRC Director, Jutta Treviranus.

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Accessibility Guidelines And Standards

Chris Ridpath
Software Designer/Programmer

The fun part of accessibility!

  • Standards
  • Conformance Levels
  • Specifications
  • Checkpoints
  • WCAG, 508, CLF, ODA

You may need to know about accessibility guidelines and standards if your site is required to confrom to them.


HTML Techniques


Web Content Accessibility Guidelines (WCAG)

  • from Web Access Initiative (WAI)
  • International
  • Published in 1999
  • Covers Most Web Content
  • Voluntary - Not Legislation
  • 3 Levels

Section 508

Common Look And Feel (CLF)

Ontarians With Disabilities Act (ODA)

  • Ontario Standard
  • First Version 2001
  • First Version Weak
  • 1 sentence: "The Government of Ontario shall provide its internet sites in a format that is accessible to persons with disabilities, unless it is not technically feasible to do so."
  • New Version (passed 3rd reading)
  • Will be good standard (likely based upon WCAG2)

International Standards

German Standard (BITV)

  • Similar To WCAG 1
  • More Practical And Functional

Euro Accessibility

  • Standards Under Development

WCAG 1.0 Themes

  • Ensuring Graceful Transformation
  • Content Understandable and Navigable
  • Guideline 1. Provide equivalent alternatives to auditory and visual content.
  • Checkpoint: 1.1 Provide a text equivalent for every non-text element.
  • Means "images must have alt text".
  • <img xhref="cat.jpg" alt="photo of a black and brown cat named Rex"/>

WCAG 1.0 in Haiku

WCAG Version 2

  • due for release this year
  • 6 years in the making
  • testable
  • well defined
  • cover all web content
  • technology agnostic
  • will likely apply to Canada
  • 3 levels

WCAG2 Lofty Principles

  • Preceivable
  • Operable
  • Understandable
  • Robust

"Preceivable" means images must have alt text


WCAG2 HTML Techniques

WCAG2, 3.2, L2, SC1

WCAG2 Components that are repeated on multiple delivery units within a resource or a section of a resource occur in the same sequence each time they are repeated, for at least one presentation format.


Conformance Logos

WCAG logo

  • Voluntary
  • Difficult to verify

WCAG2 Test Suite