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Triple A compliance requires that all WCAG 1.0 Priority 3 Checkpoints be met. This page provides a brief description of all 20 Priority 3 Checkpoints.

Checkpoint 1.5

Until user agents render text equivalents for client-side image map links, provide redundant text links for each active region of a client-side image map. In other words, provide redundant links just like you would for a server-side image map.

Checkpoint 2.2

Ensure that foreground and background color combinations of text provide sufficient contrast when viewed by someone having color deficits or when viewed on a black and white screen. [Priority 2 for images, Priority 3 for text.]

Checkpoint 4.2

Specify the expansion of each abbreviation or acronym in a document where it first occurs. Use the "title" attribute of the <abbr> and <acronym> elements.

Checkpoint 4.3

Identify the primary natural language of a document. In the <html> element, add the following attributes (note that some editors will add these automatically for you):

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

Only the "lang" attribute is required for WCAG conformance, but other attributes are for XHTML 1.0 Strict compliance.

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Checkpoint 5.5

Provide summaries for tables using the "summary" attribute of the <table> element.

Checkpoint 5.6

Provide abbreviations for table headers using the "abbr" attribute of the <th> element.

Checkpoint 9.4

Create a logical tab order through links, form controls, and objects. Use a combination of layout and, for form controls, the "tabindex" attribute.

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Checkpoint 9.5

Provide keyboard shortcuts to important links (including those in client-side image maps), form controls, and groups of form controls. Use the "accesskey" attribute for links. Note that the use of "accesskey" for keyboard shortcuts is problematic due to browser support being lacking. Reference material: http://www.alistapart.com/articles/accesskeys/.

Checkpoint 10.3

Until user agents (including assistive technologies) render side-by-side text correctly, provide a linear text alternative (on the current page or some other) for all tables that lay out text in parallel, word-wrapped columns.

Checkpoint 10.4

Until user agents handle empty controls correctly, include default, place-holding characters in edit boxes and text areas.

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Checkpoint 10.5

Until user agents (including assistive technologies) render adjacent links distinctly, include non-link, printable characters (surrounded by spaces) between adjacent links. This is as simple as adding non-breaking space "&nbps;" and vertical bar characters "|" between adjacent links.

Checkpoint 11.3

Provide information so that users may receive documents according to their preferences (e.g., language, content type, etc.)

Checkpoint 13.5

Provide navigation bars to highlight and give access to the navigation mechanism.

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Checkpoint 13.6

Group related links, identify the group (for user agents), and, until user agents do so, provide a way to bypass the group.

Checkpoint 13.7

If search functions are provided, enable different types of searches for different skill levels and preferences.

Checkpoint 13.8

Place distinguishing information at the beginning of headings, paragraphs, lists, etc.

Checkpoint 13.9

Provide information about document collections (i.e., documents comprising multiple pages). Content developers should use the LINK element and link types (refer to [HTML4], section 6.12) to describe document navigation mechanisms and organization. Some user agents may synthesize navigation tools or allow ordered printing of a set of documents based on such markup.

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Checkpoint 13.10

Provide a means to skip over multi-line ASCII art. The craigslist.org forums are a good example of the use of multi-line ASCII art – although this example does not meet Triple A requirements.

Checkpoint 14.2

Supplement text with graphic or auditory presentations where they will facilitate comprehension of the page. If a picture is worth 1,000 words, to those who can't see the picture the words are worth more.

Checkpoint 14.3

Create a style of presentation that is consistent across pages.