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WCAG 2.0
WCAG 2.0
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WCAG 2.0

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  1. ( Web 
Content
 Accessibility
 Guidelines 2.0 )‏ WCAG 2.0
  2. “ The power of the web is in its universality. Access by everyone regardless of disability is an essential aspect .” Site accessibility is a measure of how effectively all people, including those with disabilities, are able to access and use web pages. WCAG 2.0
  3. Universal Design “ I've spent the past few weeks trying to use my computer mostly via keyboard and voice control, trying to avoid touching my mouse (recurring overuse injury in my elbow)” Donna Mauer, maadmob.net/donna/blog/ WCAG 2.0
  4. The four broad categories of disabilities <ul><ul><li>Visual - blind, color blind and reduced vision </li></ul></ul><ul><ul><li>Hearing - deaf, reduced hearing </li></ul></ul><ul><ul><li>Physical - in the case of the web means those with motor disabilities that inhibits the use of the keyboard or mouse </li></ul></ul><ul><ul><li>Cognitive/ neurological - dyslexia, memory problems, attention deficit disorder. </li></ul></ul>WCAG 2.0
  5. Why does it matter? <ul><ul><li>Different able persons are invisible online </li></ul></ul><ul><ul><li>More access to information </li></ul></ul><ul><ul><li>Equal opportunity (Access for Discrimination) </li></ul></ul><ul><ul><li>Financial incentives (e.g widen number of customers, less bandwidth, faster loading pages, etc). </li></ul></ul><ul><ul><li>Competitiveness ( a good skill)‏ </li></ul></ul>WCAG 2.0
  6. WAI (Web Accessibility Initiative )‏ <ul><ul><li>Guidelines widely considered as the international standard for Web accessibility </li></ul></ul><ul><ul><li>Support materials to help understand and implement Web accessibility. </li></ul></ul>WCAG 2.0
  7. WCAG 2.0
  8. WCAG 2.0 Structure <ul><ul><li>Perceivable </li></ul></ul><ul><ul><li>Operable </li></ul></ul><ul><ul><li>Understandable </li></ul></ul><ul><ul><li>Robust </li></ul></ul>WCAG 2.0
  9. 1. Perceivable <ul><ul><li>Guidelines </li></ul></ul><ul><ul><ul><li>1.1 Text Alternatives </li></ul></ul></ul><ul><ul><ul><li>1.2 Time based Media </li></ul></ul></ul><ul><ul><ul><li>1.3 Adaptable </li></ul></ul></ul><ul><ul><ul><li>1.4 Distinguishable </li></ul></ul></ul>WCAG 2.0 Information and user interface components must be presentable to users in ways they can perceive.
  10. 1. Perceivable ( Guideline 1.1 )‏ <ul><ul><li>1.1 Text Alternatives </li></ul></ul>WCAG 2.0 Provide text alternatives for all non-text content
  11. 1. Perceivable ( Guideline 1.1 )‏ <ul><ul><li>Advisory Techniques </li></ul></ul><ul><ul><ul><li>Providing sign language videos for audio-only files </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.1 Text Alternatives </li></ul></ul>
  12. 1. Perceivable ( Guideline 1.1 )‏ <ul><ul><li>Situation A: If a short description can serve the same purpose and present the same information as the non-text content </li></ul></ul><ul><ul><ul><li>G94: Providing short text alternative for non-text content that serves the same purpose and presents the same information as the non-text content using a short text alternative technique listed below </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.1 Text Alternatives </li></ul></ul>
  13. 1. Perceivable ( Guideline 1.2 )‏ <ul><ul><li>1.2 Time based Media </li></ul></ul>WCAG 2.0 Provide synchronized alternatives for multimedia
  14. 1. Perceivable ( Guideline 1.2 )‏ <ul><ul><li>1.2.1 Audio-only and video-only </li></ul></ul><ul><ul><li>Prerecorded audio-only and prerecorded video-only media, the following are true, except when the audio or video is a media alternative for text and is clearly labeled as such: (Level A)‏ </li></ul></ul><ul><ul><ul><li>Prerecorded Audio-only </li></ul></ul></ul><ul><ul><ul><li>Prerecorded Video-only </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.2 Time based Media </li></ul></ul>
  15. 1. Perceivable ( Guideline 1.2 )‏ <ul><ul><li>1.2.1 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Providing a transcript of a live audio only presentation after the fact </li></ul></ul></ul><ul><ul><ul><li>Linking to textual information that provides comparable information (e.g. for a traffic Webcam, a municipality could provide a link to the text traffic report.)‏ </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.2 Time based Media </li></ul></ul>
  16. 1. Perceivable ( Guideline 1.2 )‏ <ul><ul><li>1.2.2 Captions (Prerecorded)‏ </li></ul></ul><ul><ul><li> Captions are provided for all prerecorded audio content in synchronized media, except when the media is a media alternative for text and is clearly labeled as such. (Level A)‏ </li></ul></ul><ul><ul><ul><li>Prerecorded Audio-only </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.2 Time based Media </li></ul></ul>
  17. 1. Perceivable ( Guideline 1.2 )‏ <ul><ul><li>1.2.2 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Providing a note saying &quot;No sound is used in this clip&quot; for video-only clips </li></ul></ul></ul><ul><ul><ul><li>Using SMIL 1.0 to provide captions for all languages for which there are audio tracks </li></ul></ul></ul><ul><ul><ul><li>Using SMIL 2.0 to provide captions for all languages for which there are audio tracks </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.2 Time based Media </li></ul></ul>
  18. 1. Perceivable ( Guideline 1.3 )‏ <ul><ul><li>1.3 Adaptable </li></ul></ul>WCAG 2.0 Ensure information and structure can be separated from presentation
  19. 1. Perceivable ( Guideline 1.3 )‏ <ul><ul><li>1.3.1 Info and Relationships </li></ul></ul><ul><ul><li> Information, structure , and relationships conveyed through presentation can be programmatically determined or are available in text. (Level A)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>1.3 Adaptable </li></ul></ul>
  20. 1. Perceivable ( Guideline 1.3 )‏ <ul><ul><li>1.3.1 Advisory Techniques </li></ul></ul><ul><ul><ul><li>C22: Using CSS to control visual presentation of text (CSS)‏ </li></ul></ul></ul><ul><ul><ul><li>Using CSS rather than tables for page layout </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.3 Adaptable </li></ul></ul>
  21. 1. Perceivable ( Guideline 1.3 )‏ <ul><ul><li>1.3.2 Meaningful Sequence </li></ul></ul><ul><ul><li>When the sequence in which content is presented affects its meaning, a correct reading sequence can be programmatically determined. (Level A)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>1.3 Adaptable </li></ul></ul>
  22. 1. Perceivable ( Guideline 1.3 )‏ <ul><ul><li>1.3.2 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Using left-justified text for languages that are written left to right and right-justified text for languages that are written right-to-left </li></ul></ul></ul><ul><ul><ul><li>Providing a link to linearized rendering </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.3 Adaptable </li></ul></ul>
  23. 1. Perceivable ( Guideline 1.3 )‏ <ul><ul><li>1.3.3 Sensory Characteristics </li></ul></ul><ul><ul><li>Instructions provided for understanding and operating content do not rely solely on sensory characteristics of components such as shape, size, visual location, orientation, or sound. (Level A)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>1.3 Adaptable </li></ul></ul>
  24. 1. Perceivable ( Guideline 1.3 )‏ <ul><ul><li>1.3.3 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Using an image with a text alternative for graphical symbols instead of a Unicode font glyph with the desired graphical appearance but different meaning </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>1.3 Adaptable </li></ul></ul>
  25. 1. Perceivable ( Guideline 1.4 )‏ 1.4 Distinguishable WCAG 2.0 Easy to distinguish foreground information from its background
  26. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.1 Use of Color </li></ul></ul><ul><ul><li> Color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element. (Level A)‏ </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  27. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.1 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Conveying information redundantly using color </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  28. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.2 Audio Control </li></ul></ul><ul><ul><li> If any audio on a Web page plays automatically for more than 3 seconds, either a mechanism is available to pause or stop the audio, or a mechanism is available to control audio volume independently from the overall system volume level. (Level A)‏ </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  29. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.2 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Conveying information redundantly using color </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  30. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.3 Contrast (Minimum)‏ </li></ul></ul><ul><ul><li> The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following: (Level AA)‏ </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  31. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.3 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Using a higher contrast value for text that is over a patterned background </li></ul></ul></ul><ul><ul><ul><li>Using a higher contrast values for lines in diagrams </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  32. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.4 Resize text </li></ul></ul><ul><ul><li> Except for captions and images of text, text can be resized without assisted technology up to 200 percent without loss of content or functionality. (Level AA) </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  33. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.4 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Providing large fonts by default </li></ul></ul></ul><ul><ul><ul><li>Using page-percent for container sizes </li></ul></ul></ul><ul><ul><ul><li>Avoiding scaling font sizes smaller than the user-agent default </li></ul></ul></ul><ul><ul><ul><li>Avoiding justified text </li></ul></ul></ul><ul><ul><ul><li>Providing sufficient inter-line and inter-column spacing </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  34. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.5 Images of Text </li></ul></ul><ul><ul><li>If the technologies being used can achieve the visual presentation, text is used to convey information rather than images of text except for the following: (Level AA) </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  35. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.5 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Identifying informative non-text content </li></ul></ul></ul><ul><ul><ul><li>Avoid applying text styling to text characters within a word </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  36. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.6 Contrast (Enhanced)‏ </li></ul></ul><ul><ul><li>The visual presentation of text and images of text has a contrast ratio of at least 7:1, except for the following: (Level AAA) </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  37. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.6 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Large Text </li></ul></ul></ul><ul><ul><ul><li>Incidental </li></ul></ul></ul><ul><ul><ul><li>Logotypes </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  38. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.7 Contrast (Enhanced)‏ </li></ul></ul><ul><ul><li>The visual presentation of text and images of text has a contrast ratio of at least 7:1, except for the following: (Level AAA) </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  39. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.7 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Large Text </li></ul></ul></ul><ul><ul><ul><li>Incidental </li></ul></ul></ul><ul><ul><ul><li>Logotypes </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  40. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.8 Low or No Background Audio </li></ul></ul><ul><ul><li>-> contains primarily speech in the foreground </li></ul></ul><ul><ul><li>-> is not an audio CAPTCHA or audio logo </li></ul></ul><ul><ul><li>-> is not vocalization intended to be primarily musical expression such as singing or rapping </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  41. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.8 Advisory Techniques </li></ul></ul><ul><ul><ul><li>No Background: The audio does not contain background sounds. </li></ul></ul></ul><ul><ul><ul><li>Turn Off: The background sounds can be turned off. </li></ul></ul></ul><ul><ul><ul><li>20 dB: The background sounds are at least 20 decibels lower than the foreground speech content </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  42. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.9 Visual Presentation </li></ul></ul><ul><ul><li>For the visual presentation of blocks of text, a mechanism is available to achieve the following: (Level AAA) </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  43. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.9 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Foreground and background colors can be selected by the user. </li></ul></ul></ul><ul><ul><ul><li>Width is no more than 80 characters or glyphs (40 if CJK). </li></ul></ul></ul><ul><ul><ul><li>Text is not justified (aligned to both the left and the right margins). </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  44. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.10 Images of Text (No Exception): </li></ul></ul><ul><ul><li>Images of text are only used for pure decoration or where a particular presentation of text is essential to the information being conveyed. (Level AAA) </li></ul></ul>WCAG 2.0 1.4 Distinguishable
  45. 1. Perceivable ( Guideline 1.4 )‏ <ul><ul><li>1.4.10 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Using server-side scripts to resize images of text </li></ul></ul></ul>WCAG 2.0 1.4 Distinguishable
  46. 2. Operable <ul><ul><li>Guidelines </li></ul></ul><ul><ul><ul><li>2.1 Keyboard </li></ul></ul></ul><ul><ul><ul><li>2.2 Enough Time </li></ul></ul></ul><ul><ul><ul><li>2.3 Seizures </li></ul></ul></ul><ul><ul><ul><li>2.4 Navigable </li></ul></ul></ul>WCAG 2.0 User interface components and navigation must be operable
  47. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.1 Keyboard Accessible </li></ul></ul>WCAG 2.0 Make all functionality available from a keyboard.
  48. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.1.1 Keyboard </li></ul></ul><ul><ul><li>All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes, except where the underlying function requires input that depends on the path of the user's movement and not just the endpoints. (Level A)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>2.1 Keyboard Accessible </li></ul></ul>
  49. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.1.1 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Using XHTML role, state, and value attributes if repurposing static elements as interactive user interface components </li></ul></ul></ul><ul><ul><ul><li>Providing keyboard shortcuts to important links and form controls </li></ul></ul></ul><ul><ul><ul><li>Using unique letter combinations to begin each item of a list </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>2.1 Keyboard Accessible </li></ul></ul>
  50. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.1.2 No Keyboard Trap </li></ul></ul><ul><ul><li>If keyboard focus can be moved to a component of the page using a keyboard interface, then focus can be moved away from that component using only a keyboard interface, and, if it requires more than unmodified arrow or tab keys or other standard exit methods, the user is advised of the method for moving focus away. (Level A)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>2.1 Keyboard Accessible </li></ul></ul>
  51. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.1.3 Keyboard (No Exception)‏ </li></ul></ul><ul><ul><li>All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes. (Level AAA) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.1 Keyboard Accessible </li></ul></ul>
  52. 2. Operable ( Guideline 2.2 )‏ <ul><ul><li>2.2.1 Timing Adjustable </li></ul></ul><ul><ul><li>For each time limit that is set by the content, at least one of the following is true: (Level A)‏ </li></ul></ul><ul><ul><li>Turn off </li></ul></ul><ul><ul><li>Adjust </li></ul></ul><ul><ul><li>Extend </li></ul></ul><ul><ul><li>Real-time Exception </li></ul></ul>WCAG 2.0 <ul><ul><li>2.2 Enough Time </li></ul></ul>
  53. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.2.1 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Using a script to poll the server and notify a user if a time limit is present </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>2.2 Enough Time </li></ul></ul>
  54. 2. Operable ( Guideline 2.2 )‏ <ul><ul><li>2.2.2 Pause, Stop, Hide </li></ul></ul><ul><ul><li>For moving, blinking, scrolling, or auto-updating information, all of the following are true: (Level A)‏ </li></ul></ul><ul><ul><li>Moving, blinking, scrolling </li></ul></ul><ul><ul><li>Auto-updating </li></ul></ul>WCAG 2.0 <ul><ul><li>2.2 Enough Time </li></ul></ul>
  55. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.2.2 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Providing a mechanism to stop all content that blinks within a Web page </li></ul></ul></ul><ul><ul><ul><li>Providing the user with a means to stop moving content even if it stops automatically within 5 seconds </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>2.2 Enough Time </li></ul></ul>
  56. 2. Operable ( Guideline 2.2 )‏ <ul><ul><li>2.2.3 No Timing </li></ul></ul><ul><ul><li>2.2.4 Interruptions </li></ul></ul><ul><ul><li>2.2.5 Re-authenticating </li></ul></ul>WCAG 2.0 <ul><ul><li>2.2 Enough Time </li></ul></ul>
  57. 2. Operable ( Guideline 2.3 )‏ <ul><ul><li>2.3.1 Three Flashes or Below Threshold </li></ul></ul><ul><ul><li>Web pages do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.3 Seizures </li></ul></ul>
  58. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.3.1 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Reducing contrast for any flashing content </li></ul></ul></ul><ul><ul><ul><li>Avoiding fully saturated reds for any flashing content </li></ul></ul></ul><ul><ul><ul><li>Reducing the number of flashes even if they do not violate thresholds </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>2.3 Seizures </li></ul></ul>
  59. 2. Operable ( Guideline 2.3 )‏ <ul><ul><li>2.3.2 Three Flashes or Below Threshold </li></ul></ul><ul><ul><li>Web pages do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.3 Seizures </li></ul></ul>
  60. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.3.1 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Reducing contrast for any flashing content </li></ul></ul></ul><ul><ul><ul><li>Avoiding fully saturated reds for any flashing content </li></ul></ul></ul><ul><ul><ul><li>Reducing the number of flashes even if they do not violate thresholds </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>2.3 Seizures </li></ul></ul>
  61. 2. Operable ( Guideline 2.3 )‏ <ul><ul><li>2.3.2 Three Flashes </li></ul></ul><ul><ul><li>Web pages do not contain anything that flashes more than three times in any one second period. (Level AAA)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>2.3 Seizures </li></ul></ul>
  62. 2. Operable ( Guideline 2.1 )‏ <ul><ul><li>2.3.2 Advisory Techniques </li></ul></ul><ul><ul><ul><li>Slowing down live material to avoid rapid flashes (as in flashbulbs) </li></ul></ul></ul><ul><ul><ul><li>Freezing the image momentarily if 3 flashes within one second are detected </li></ul></ul></ul><ul><ul><ul><li>Dropping the contrast ratio if 3 flashes within one second are detected </li></ul></ul></ul>WCAG 2.0 <ul><ul><li>2.3 Seizures </li></ul></ul>
  63. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.1 Bypass Blocks </li></ul></ul><ul><ul><li>A mechanism is available to bypass blocks of content that are repeated on multiple Web pages. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  64. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.2 Page Titled </li></ul></ul><ul><ul><li>Web pages have titles that describe topic or purpose. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  65. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.3 Focus Order </li></ul></ul><ul><ul><li>If a Web page can be navigated sequentially and the navigation sequences affect meaning or operation, focusable components receive focus in an order that preserves meaning and operability. (Level A)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  66. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.4 Link Purpose (In Context)‏ </li></ul></ul><ul><ul><li>The purpose of each link can be determined from the link text alone or from the link text together with its programmatically determined link context, except where the purpose of the link would be ambiguous to users in general. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  67. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.5 Multiple Ways </li></ul></ul><ul><ul><li>More than one way is available to locate a Web page within a set of Web pages except where the Web Page is the result of, or a step in, a process. (Level AA) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  68. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.6 Headings and Labels </li></ul></ul><ul><ul><li>Headings and labels describe topic or purpose. (Level AA) </li></ul></ul><ul><ul><li>2.4.7 Focus Visible </li></ul></ul><ul><ul><li>Any keyboard operable user interface has a mode of operation where the keyboard focus indicator is visible. (Level AA) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  69. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.8 Location </li></ul></ul><ul><ul><li>Information about the user's location within a set of Web pages is available. (Level AAA) </li></ul></ul><ul><ul><li>2.4.9 Link Purpose (Link Only)‏ </li></ul></ul><ul><ul><li>A mechanism is available to allow the purpose of each link to be identified from link text alone. (Level AAA) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  70. 2. Operable ( Guideline 2.4 )‏ <ul><ul><li>2.4.10 Section Headings </li></ul></ul><ul><ul><li>Section headings are used to organize the content. (Level AAA) </li></ul></ul>WCAG 2.0 <ul><ul><li>2.4 Navigable </li></ul></ul>
  71. 3. Understandable <ul><ul><li>Guidelines </li></ul></ul><ul><ul><ul><li>3.1 Readable </li></ul></ul></ul><ul><ul><ul><li>3.2 Predictable </li></ul></ul></ul><ul><ul><ul><li>3.3 Input Assistance </li></ul></ul></ul><ul><ul><ul><li>3.4 Help </li></ul></ul></ul><ul><ul><ul><li>3.5 Error Prevention (All)‏ </li></ul></ul></ul>WCAG 2.0 Information and the operation of user interface must be understandable
  72. 3. Understandable ( Guideline 3.1 )‏ <ul><ul><li>3.1.1 Language of Page </li></ul></ul><ul><ul><li>The default human language of each Web page can be programmatically determined. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.1 Readable </li></ul></ul>
  73. 3. Understandable ( Guideline 3.1 )‏ <ul><ul><li>3.1.2 Language of Parts </li></ul></ul><ul><ul><li>Except for proper names, technical terms, words of indeterminate language, and words or phrases that have become part of the vernacular of the immediately surrounding text. (Level AA)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>3.1 Readable </li></ul></ul>
  74. 3. Understandable ( Guideline 3.1 )‏ <ul><ul><li>3.1.3 Unusual Words </li></ul></ul><ul><ul><li>A mechanism is available for identifying specific definitions of words or phrases used in an unusual or restricted way, including idioms and jargon. (Level AAA) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.1 Readable </li></ul></ul>
  75. 3. Understandable ( Guideline 3.1 )‏ <ul><ul><li>3.1.4 Abbreviations </li></ul></ul><ul><ul><li>A mechanism for identifying the expanded form or meaning of abbreviations is available. (Level AAA) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.1 Readable </li></ul></ul>
  76. 3. Understandable ( Guideline 3.1 )‏ <ul><ul><li>3.1.5 Reading Level </li></ul></ul><ul><ul><li>Proper names and titles, supplemental content, or a version that does not require reading ability more advanced than the lower secondary education level, is available. (Level AAA) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.1 Readable </li></ul></ul>
  77. 3. Understandable ( Guideline 3.2 )‏ <ul><ul><li>3.2.1 On Focus </li></ul></ul><ul><ul><li>When any component receives focus, it does not initiate a change of context. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.2 Predictable </li></ul></ul>
  78. 3. Understandable ( Guideline 3.2 )‏ <ul><ul><li>3.2.2 On Input </li></ul></ul><ul><ul><li>Changing the setting of any user interface component does not automatically cause a change of context unless the user has been advised of the behavior before using the component. (Level A) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.2 Predictable </li></ul></ul>
  79. 3. Understandable ( Guideline 3.2 )‏ <ul><ul><li>3.2.3 Consistent Navigation </li></ul></ul><ul><ul><li>Navigational mechanisms that are repeated on multiple Web pages within a set of Web pages occur in the same relative order each time they are repeated, unless a change is initiated by the user. (Level AA) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.2 Predictable </li></ul></ul>
  80. 3. Understandable ( Guideline 3.2 )‏ <ul><ul><li>3.2.4 Consistent Identification </li></ul></ul><ul><ul><li>Components that have the same functionality within a set of Web pages are identified consistently. (Level AA) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.2 Predictable </li></ul></ul>
  81. 3. Understandable ( Guideline 3.2 )‏ <ul><ul><li>3.2.5 Change on Request </li></ul></ul><ul><ul><li>Changes of context are initiated only by user request or a mechanism is available to turn off such changes. (Level AAA) </li></ul></ul>WCAG 2.0 <ul><ul><li>3.2 Predictable </li></ul></ul>
  82. 3. Understandable ( Guideline 3.3 )‏ <ul><ul><li>3.3.1 Error Identification (A)‏ </li></ul></ul><ul><ul><li>3.3.2 Labels or Instructions (A)‏ </li></ul></ul><ul><ul><li>3.3.3 Error Suggestion (AA)‏ </li></ul></ul><ul><ul><li>3.3.4 Error Prevention (Legal, Financial, Data) (AA)‏ </li></ul></ul><ul><ul><li>3.3.5 Help (AAA)‏ </li></ul></ul><ul><ul><li>3.3.6 Error Prevention (AAA)‏ </li></ul></ul>WCAG 2.0 <ul><ul><li>3.3 Input Assistance </li></ul></ul>
  83. 4. Robust <ul><ul><li>Guidelines </li></ul></ul><ul><ul><ul><li>4.1 Parsing (A)‏ </li></ul></ul></ul><ul><ul><ul><li>3.2 Name, Role, Value (A)‏ </li></ul></ul></ul>WCAG 2.0 Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.
  84. Test WCAG 2.0 <ul><ul><li>WAVE – http://wave.webaim.org/toolbar </li></ul></ul><ul><ul><li>Screen Readers </li></ul></ul><ul><ul><ul><li>NVDA – http://www.nvda-project.org </li></ul></ul></ul><ul><ul><ul><li>JAWS for Windows – http://www.freedomscientific.com </li></ul></ul></ul><ul><ul><li>Screen Magnifiers </li></ul></ul><ul><ul><ul><li>ZoomText Xtra – http://www.aisquared.com </li></ul></ul></ul><ul><ul><ul><li>Dolphin Supernova – http://www.yourdolphin.com </li></ul></ul></ul><ul><ul><li>Alternate Input devices – </li></ul></ul><ul><ul><ul><li>Track ball and switch – http://www.ablenetinc.com </li></ul></ul></ul><ul><ul><li>Dragon Naturally Speaking </li></ul></ul><ul><ul><ul><li>http://www.nuance.com </li></ul></ul></ul><ul><ul><li>Talks – a screen reader for mobile S60 phones </li></ul></ul><ul><ul><ul><li>http://www.nuance.com/talks/ </li></ul></ul></ul>
  85. Thank you WCAG 2.0 <ul><ul><li>Sathasivam K. </li></ul></ul><ul><ul><li>E-Mail: [email_address] </li></ul></ul><ul><ul><li>Blog : http://sadhas.wordpress.com/ </li></ul></ul><ul><ul><li>Website: http:// ijoin.webnode.com/ </li></ul></ul>

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