overscore

Table of Contents(TOC)

1. a
2. address
3. all Elements
4. applet
5. area
6. b
7. basefont
8. blink
9. blockquote
10. body
11. caption
12. doctype
13. embed
14. font
15. form
16. frame
17. frameset
18. h1-h6
19. html
20. i
21. iframe
22. img
23. input
24. legend
25. link
26. marquee
27. menu
28. meta
29. noframes
30. object
31. ol
32. paragraph
33. pre
34. script
35. select
36. table
37. textarea
38. title

Introduction to WCAG2

WCAG2 is the current working draft from the World Wide Web Consortium(W3C), as of May 2006, replacing WCAG1. The reason for the updated guidelines is to address many technology advances since the WCAG1 original publication on May 5th, 1999.The goal of WCAG2 is to provide “principles, guidelines, and success criteria that define and explain the requirements for making Web-based information and applications accessible.” WCAG2 Abstract Following the guidelines will ensure that a Web site is accessible to a wide variety of users including older users, users of small screen devices, such as Personal Digital Assistants(PDA), and users with varying accessible needs. The WCAG2 is currently a working draft and has not been finalized yet but a majority of the guidelines are not expected to change.

a Back to TOC

• a – Text alternative for multimedia file tells the same story and presents the same information as the multimedia file.
• a – All source anchors contain text that identifies the link destination.
• a – The title attribute of all source a (anchor) elements describes the link destination.
• a – Anchor element must have a title attribute.
• a – Anchor must not use Javascript URL protocol.
• a – Adjacent links with same resource must be combined.
• a – Alt text for all img elements used as source anchors is different from the link text.
• a – Each source anchor contains text.
• a – Suspicious link text.
• a – Link sets must be grouped.
• a – Links to multimedia have a link to text alternative.
• a – Include non-link, printable characters (surrounded by spaces) between adjacent links.
• a – A “skip to content” link appears on all pages with blocks of material prior to the main document.
• a – Links to multimedia require a text transcript.
• a – Link text is meaningful when read out of context.
• a – Anchor should not open new window without warning.
• a – Sound file must have a text transcript.

address Back to TOC

• address –
  address of page author must be valid.

• address – Content must have an address for author.

all elements Back to TOC

• all elements – Change of context occurs only by user activation unless a warning is provided.
• all elements – Content must be readable when stylesheets are not applied.
• all elements – All onmouseup event handlers have an associated onkeyup event handler.
• all elements – All onmouseover event handlers have an associated onfocus event handler.
• all elements – All onmouseout event handlers have an associated onblur event handler.
• all elements – All onmousemove event handlers have corresponding keyboard-specific functions.
• all elements – All onmousedown event handlers have an associated onkeydown event handler.
• all elements – All ondblclick event handlers have corresponding keyboard-specific functions.
• all elements – All onclick event handlers have an associated onkeypress event handler.

applet Back to TOC

• applet –
  applet provides a keyboard mechanism to return focus to the parent window.
• applet –
  applet user interface must be accessible.
• applet –

  applet contains a text equivalent in the body of the applet.

• applet – Text equivalents for applet must be updated if applet changes.
• applet –
  applet contains a text equivalent in the alt attribute of the applet.
• applet – All applets do not flicker.
• applet –
  applet should not use color alone.

area Back to TOC

• area – Alt text for all area elements contains all non decorative text in the image area.
• area –
  area should not open new window without warning.
• area –
  area link to sound file must have text transcript.
• area – Alt text for all area elements identifies the link destination.
• area – All area elements have an alt attribute.

b Back to TOC

• b –
  b (bold) element is not used.

basefont Back to TOC

• basefont –

  basefont must not be used.

blink Back to TOC

• blink –
  blink element is not used.

blockquote Back to TOC

• blockquote –
  blockquote must not be used for indentation.

body Back to TOC

• body – Repeated components appear in the same relative order each time they appear.
• body – Loading the web page does not cause a new window to open.
• body – All changes in text direction are marked using the dir attribute.
• body – Unicode right-to-left marks or left-to-right marks are used whenever the HTML bidirectional algorithm produces undesirable results.
• body – The document contains a breadcrumb trail if it is part of a collection.
• body – All groups of links with a related purpose are marked.
• body – Each section of content is marked with a header element.
• body – The luminosity contrast ratio between visited link text and background color is at least 10:1.
• body – The luminosity contrast ratio between active link text and background color is at least 10:1.
• body – The luminosity contrast ratio between link text and background color is at least 10:1.
• body – The luminosity contrast ratio between text and background color is at least 10:1.
• body – All text colors or no text colors are set.
• body – All text references do not use shape, size, or relative position alone.
• body – Semantic markup is used to indicate emphasized or special text.
• body – All visual lists are marked.
• body – Table markup is used for all tabular information.
• body – The reading direction of all text is correctly marked.
• body – The contrast between visited link text and background color is greater than WAI ERT color algorithm threshold.
• body – The contrast between active link text and background color is greater than WAI ERT color algorithm threshold.
• body – The contrast between link text and background color is greater than WAI ERT color algorithm threshold.
• body – The contrast between text and background colors is greater than WAI ERT color algorithm threshold.
• body – The luminosity contrast ratio between visited link text and background color is at least 5:1.
• body – The luminosity contrast ratio between active link text and background color is at least 5:1.
• body – The luminosity contrast ratio between link text and background color is at least 5:1.
• body – The luminosity contrast ratio between text and background color is at least 5:1.
• body –
  id attributes must be unique.
• body – Sites must have a site map.
• body – Do not use background images.
• body – Provide a reference to a glossary.
• body – Emoticon missing abbr.
• body – Excessive use of emoticons.
• body – Use the blockquote element to mark up block quotations.
• body – Words and phrases not in the document’s primary language are marked.
• body – Acronyms must be marked with acronym element.
• body – Abbreviations must be marked with abbr element.

caption Back to TOC

• caption – Table captions identify the table.

doctype Back to TOC

• doctype – Strict doctype is declared.
• doctype – HTML content has a valid doctype declaration.

embed Back to TOC

• embed –
  embed provides a keyboard mechanism to return focus to the parent window.
• embed –
  embed must not have empty Alt text.
• embed –

  embed must have alt attribute.

• embed –
  noembed must have equivalent content.
• embed – All embed elements have an associated noembed element that contains a text equivalent to the embed element.

font Back to TOC

• font –
  font must not be used.

form Back to TOC

• form – Information deleted using a web page can be recovered.
• form – Form submission data is presented to the user before final acceptance for all irreversable transactions.
• form – All form submission error messages provide assistance in correcting the error.
• form – All form submission error messages identify any empty required fields.
• form – The tab order specified by tabindex attributes follows a logical order.
• form – All checkbox groups are marked using fieldset and legend elements.
• form – All form fields that are required are indicated to the user as required.
• form – The labels for form submit buttons are unique for all buttons that lead to different results.
• form – All radio button groups are marked using fieldset and legend elements.

frame WCAG2 definition: frame Back to TOC

• frame –
  frame element is not used.
• frame – All frame titles do not contain placeholder text.
• frame – All frame titles are not empty.
• frame – The source for each frame is accessible content.
• frame – All frame titles identify the purpose or function of the frame.
• frame – All frames have a title attribute.

frameset Back to TOC

• frameset – Repeated blocks of content appear in the same frame within the frameset.
• frameset –
  frameset element is not used.
• frameset –
  frameset must have a noframes section.
• frameset – Relationship between frames must be described.

h1-h6 Back to TOC

• h1 – All h1 elements are not used for formatting.
• h1 – The header following an h1 is h1 or h2.
• h2 – All h2 elements are not used for formatting.
• h2 – The header following an h2 is h1, h2 or h3.
• h3 – All h3 elements are not used for formatting.
• h3 – The header following an h3 is h1, h2, h3 or h4.
• h4 – All h4 elements are not used for formatting.
• h4 – The header following an h4 is h1, h2, h3, h4 or h5.
• h5 – All h5 elements are not used for formatting.
• h5 – The header following an h5 is h6 or any header less than h3.
• h6 – All h6 elements are not used for formatting.

html Back to TOC

• html – Reading order direction is marked using the html element’s dir attribute if the document’s primary language is read right to left.
• html – Document validates to specification.
• html – Document has valid language code.
• html – Document has required lang attribute(s).

i Back to TOC

• i –
  i (italic) element is not used.

iframe Back to TOC

• iframe –
  iframe must not use longdesc.
• iframe –
  iframes must have alternate content.

img Back to TOC

• img – The luminosity contrast ratio between text and background color in all images is at least 10:1.
• img – The luminosity contrast ratio between text and background color in all images is at least 5:1.
• img –

  title attribute for all img elements is absent or the empty string (“”) if the image is decorative.

• img – There are no adjacent text and image links having the same destination.
• img – Server-side image maps are not used except when image map regions cannot be defined using an available geometric shape.
• img – Link text does not begin with “link to” or “go to” (English).
• img – Alt text for all img elements that are not used as source anchors conveys the same information as the image.
• img – All img elements do not contain a title attribute.
• img – All img elements with images containing math expressions have equivalent MathML markup.
• img – All active areas in all server-side image maps have duplicate text links in the document.
• img – Image used in input element – Alt text should not be placeholder text.
• img – Image used in input element – Alt text should not be the same as the filename.
• img – Alt text for all img elements is the empty string (“”) if the image is decorative.
• img – Alt text for all img elements used as source anchors identifies the destination of the link.
• img – For all img elements, text does not refer to the image by color alone.
• img – All links in all client side image-maps are duplicated within the document.
• img – All img elements with an ismap attribute have a valid usemap attribute.
• img – Alt text for all img elements contains all text in the image unless the image text is decorative or appears elsewhere in the document.
• img – All img elements have associated images that do not flicker.
• img – All img elements that have a longdesc attribute also have an associated ‘d-link’.
• img – A long description is used for each img element that does not have Alt text conveying the same information as the image.
• img – Alt text for all img elements used as source anchors is not empty when there is no other text in the anchor.
• img – Alt text for all img elements is not placeholder text unless author has confirmed it is correct.
• img – Important images should not have spacer Alt text.
• img – Non-Decorative images must have Alt text.
• img – Image Alt text is short.
• img – Alt text is not the same as the filename unless author has confirmed it is correct.
• img – All img elements have an alt attribute.

input Back to TOC

• input – All input elements, type of “submit”, have a valid tab index.
• input – All input elements, except those with with a type attribute value of “image”, do not have an alt attribute.
• input – All input elements, type of “radio”, have a label that describes the purpose or function of the control.
• input – All input elements, type of “checkbox”, have a label that describes the purpose or function of the control.
• input – All input elements, type of “text”, have a label that describes the purpose or function of the control.
• input – All input elements, type of “password”, have a label that describes the purpose or function of the control.
• input – All input elements, type of “file”, have a label containing text.
• input – All input elements, type of “text”, have a label containing text.
• input – All input elements, type of “text”, have a label that is positioned close to the control.
• input – All input elements, type of “password”, have a label containing text.
• input – All input elements, type of “checkbox”, have a label containing text.
• input – All input elements, type of “file”, have a label that describes the purpose or function of the control.
• input – All input elements, type of “radio”, have a label containing text.
• input – Alt text for all input elements with a type attribute value of “image” contains all non decorative text in the image.
• input – Alt text for all input elements with a type attribute value of “image” does not use the words “submit” or “button” (English).
• input – Each label describes its asssociated input element.
• input – Each label associated with an input element contains text.
• input – Each input element has only one associated label.
• input – All label elements do not contain input elements.
• input – All input elements, type of “file”, have a valid tab index.
• input – All input elements, type of “checkbox”, have a valid tab index.
• input – All input elements, type of “password”, have a valid tab index.
• input – All input elements, type of “radio”, have a valid tab index.
• input – All input elements, type of “text”, have a valid tab index.
• input –
  input control, type of “text”, must have valid default text.
• input – All input elements, type of “radio”, have a label that is positioned close to the control.
• input – All input elements, type of “file”, have a label that is positioned close to the control.
• input – All input elements, type of “checkbox”, have a label that is positioned close to the control.
• input – All input elements, type of “password”, have a label that is positioned close to the control.
• input – All input elements, type of “radio”, have an explicitly associated label.
• input – All input elements, type of “file”, have an explicitly associated label.
• input – All input elements, type of “checkbox”, have an explicitly associated label.
• input – All input elements, type of “password”, have an explicitly associated label.
• input –
  input element, type of “text”, must have default text.

• input – Alt text for all input elements with a type attribute value of “image” is less than 100 characters (English) or the user has confirmed that the Alt text is as short as possible.
• input – Alt text for all input elements with a type attribute value of “image” identifies the purpose or function of the image.
• input – All input elements with a type attribute value of “image” have an alt attribute.
• input – All input elements, type of “text”, have an explicitly associated label.
• input –
  input should not use color alone.

legend Back to TOC

• legend –

  legend text is not placeholder text.

• legend –
  legend text is not empty or whitespace.
• legend –
  legend text describes the group of choices.

link Back to TOC

• link – Document should use LINK for alternate content.
• link – Document uses link element to describe navigation if it is within a collection.
• link – Document must be readable when stylesheets are not applied.

marquee Back to TOC

• marquee –
  marquee element is not used.

menu Back to TOC

• menu –
  menu items should not be used to format text.

meta Back to TOC

• meta – Meta refresh is not used with a time-out.
• meta – Auto-redirect must not be used.

noframes Back to TOC

• noframes – NOFRAMES section must contain text equivalent of FRAMES section.

object Back to TOC

• object –
  object provides a keyboard mechanism to return focus to the parent window.

• object – Use the embed element within the object element.
• object –
  object may require a long description.

• object –
  object link to multimedia file require equivalent alternatives (e.g., captions or auditory descriptions of the visual track).
• object –
  object user interface must be accessible.
• object – Content must be usable when objects are disabled.
• object – Text equivalents for object should be updated if object changes.
• object – All objects contain a text equivalent of the object.
• object –
  object must have a valid title.
• object –
  object must have a title.

• object –
  object link to multimedia file must have text transcript.
• object –
  object user interface must be accessible.
• object – Content must be usable when object are disabled.
• object – Text equivalents for object should be updated if object changes.
• object –
  object must not use color alone.

• object – All objects do not flicker.

ol Back to TOC

• ol – CSS must be used to hide link groups.
• ol – Link group title must describe the link group.
• ol – Link groups must have a title.
• ol – Use CSS, not images, to change list bullets.
• ol – Nested ordered lists should use style to convey list depth.
• ol – List items must not be used to format text.

p Back to TOC

• p – All p elements are not used as headers.

pre Back to TOC

• pre –

  pre element should not be used to create tabular layout.

• pre – ASCII art should have a skipover link.
• pre – ASCII art should be replaced with image.

script Back to TOC

• script – Content must be readable when stylesheets are not applied (SCRIPT).
• script –
  script must have a noscript section.
• script – User interface for script must be accessible.
• script – Content must be accessible when script is disabled.
• script –
  script should not cause screen flicker.
• script – Color alone should not be used in the script.

select WCAG2 definition: select Back to TOC

• select – All select elements have a label that describes the purpose or function of the control.
• select – All select elements have a label that is positioned close to the control.
• select – All select elements have a label that contains text.
• select – All select elements containing a large number options also contain optgroup elements.
• select – All select elements do not cause an extreme change in context.
• select – All select elements have an explicitly associated label.

table Back to TOC

• table – Data tables that contain more than one row/column of headers use the id and headers attributes to identify cells.
• table – Data tables that contain both row and column headers use the scope attribute to identify cells.
• table – Table summaries do not duplicate the table captions.
• table – Use colgroup and col elements to group columns.
• table – Use thead to group repeated table headers, tfoot for repeated table footers, and tbody for other groups of rows.
• table – All data table summaries describe navigation and structure of the table.
• table – Substitutes for table header labels must be terse.
• table – Long table header labels require terse substitutes.
• table – All data tables contain a caption unless the table is identified within the document.
• table – All layout tables do not contain th elements.
• table – All data tables contain th elements.
• table – All layout tables make sense when linearized.
• table – All layout tables do not contain caption elements.
• table – All layout tables have an empty summary attribute or no summary attribute.
• table – All data table summaries are greater than 10 printable characters (English).
• table – All data table summaries contain text.
• table – All complex data tables have a summary.

textarea Back to TOC

• textarea – All textarea elements have a label that describes the purpose or function of the control.
• textarea – All textarea elements have a label containing text.
• textarea – All textarea elements have a label that is positioned close to control.
• textarea – All textarea elements have an explicitly associated label.

title Back to TOC

• title –

  title describes the document.

• title –
  title is not placeholder text.
• title –
  title is short.

• title –
  title contains text.
• title – Document contains a title element.