| World Wide Web Consortium (W3C)
WAI Accessibility Checklist.
You can reach it on there web site here: www.w3.org/TR/WCAG10/full-checklist.html
In General (Priority 1)
1.1 Provide a text equivalent for every non-text
element (e.g., via "alt", "longdesc",
or in element content). This includes: images, graphical
representations of text (including symbols), image map
regions, animations (e.g., animated GIFs), applets and
programmatic objects, ascii art, frames, scripts, images
used as list bullets, spacers, graphical buttons, sounds
(played with or without user interaction), stand-alone
audio files, audio tracks of video, and video.
2.1 Ensure that all information conveyed with
color is also available without color, for example from
context or markup.
4.1 Clearly identify changes in the natural language
of a document's text and any text equivalents (e.g.,
captions).
6.1 Organize documents so they may be read without
style sheets. For example, when an HTML document is
rendered without associated style sheets, it must still
be possible to read the document.
6.2 Ensure that equivalents for dynamic content
are updated when the dynamic content changes.
7.1 Until user agents allow users to control flickering,
avoid causing the screen to flicker.
14.1 Use the clearest and simplest language appropriate
for a site's content.
And if you use images and image maps (Priority 1)
1.2 Provide redundant text links for each active
region of a server-side image map.
9.1 Provide client-side image maps instead of
server-side image maps except where the regions cannot
be defined with an available geometric shape.
And if you use tables (Priority 1)
5.1 For data tables, identify row and column headers.
5.2 For data tables that have two or more logical
levels of row or column headers, use markup to associate
data cells and header cells.
And if you use frames (Priority 1)
12.1 Title each frame to facilitate frame identification
and navigation.
And if you use applets and scripts (Priority 1)
6.3 Ensure that pages are usable when scripts,
applets, or other programmatic objects are turned off
or not supported. If this is not possible, provide equivalent
information on an alternative accessible page.
And if you use multimedia (Priority 1)
1.3 Until user agents can automatically read aloud
the text equivalent of a visual track, provide an auditory
description of the important information of the visual
track of a multimedia presentation.
1.4 For any time-based multimedia presentation
(e.g., a movie or animation), synchronize equivalent
alternatives (e.g., captions or auditory descriptions
of the visual track) with the presentation.
And if all else fails (Priority 1)
11.4 If, after best efforts, you cannot create
an accessible page, provide a link to an alternative
page that uses W3C technologies, is accessible, has
equivalent information (or functionality), and is updated
as often as the inaccessible (original) page.
In General (Priority 2)
- Ensure that foreground and background color combinations
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].
- When an appropriate markup language exists, use
markup rather than images to convey information.
- Create documents that validate to published formal
grammars.
- Use style sheets to control layout and presentation.
- Use relative rather than absolute units in markup
language attribute values and style sheet property
values.
- Use header elements to convey document structure
and use them according to specification.
- Mark up lists and list items properly.
- Mark up quotations. Do not use quotation markup
for formatting effects such as indentation.
- Ensure that dynamic content is accessible or provide
an alternative presentation or page.
- Until user agents allow users to control blinking,
avoid causing content to blink (i.e., change presentation
at a regular rate, such as turning on and off).
- Until user agents provide the ability to stop the
refresh, do not create periodically auto-refreshing
pages.
- Until user agents provide the ability to stop auto-redirect,
do not use markup to redirect pages automatically.
Instead, configure the server to perform redirects.
- Until user agents allow users to turn off spawned
windows, do not cause pop-ups or other windows to
appear and do not change the current window without
informing the user.
- Use W3C technologies when they are available and
appropriate for a task and use the latest versions
when supported.
- Avoid deprecated features of W3C technologies.
- Divide large blocks of information into more manageable
groups where natural and appropriate.
- Clearly identify the target of each link.
- Provide metadata to add semantic information to
pages and sites.
- Provide information about the general layout of
a site (e.g., a site map or table of contents).
- Use navigation mechanisms in a consistent manner.
And if you use tables (Priority 2)
- Do not use tables for layout unless the table makes
sense when linearized. Otherwise, if the table does
not make sense, provide an alternative equivalent
(which may be a linearized version).
- If a table is used for layout, do not use any structural
markup for the purpose of visual formatting.
And if you use frames (Priority 2)
- Describe the purpose of frames and how frames relate
to each other if it is not obvious by frame titles
alone.
And if you use forms (Priority 2)
- Until user agents support explicit associations
between labels and form controls, for all form controls
with implicitly associated labels, ensure that the
label is properly positioned.
- Associate labels explicitly with their controls.
And if you use applets and scripts (Priority 2)
- For scripts and applets, ensure that event handlers
are input device-independent.
- Until user agents allow users to freeze moving content,
avoid movement in pages.
- Make programmatic elements such as scripts and applets
directly accessible or compatible with assistive technologies
[Priority 1 if functionality is important and
not presented elsewhere, otherwise Priority 2.]
- Ensure that any element that has its own interface
can be operated in a device-independent manner.
- For scripts, specify logical event handlers rather
than device-dependent event handlers.
In General (Priority 3)
- Specify the expansion of each abbreviation or acronym
in a document where it first occurs.
- Identify the primary natural language of a document.
- Create a logical tab order through links, form controls,
and objects.
- Provide keyboard shortcuts to important links (including
those in client-side image maps), form controls, and
groups of form controls.
- Until user agents (including assistive technologies)
render adjacent links distinctly, include non-link,
printable characters (surrounded by spaces) between
adjacent links.
- Provide information so that users may receive documents
according to their preferences (e.g., language, content
type, etc.)
- Provide navigation bars to highlight and give access
to the navigation mechanism.
- Group related links, identify the group (for user
agents), and, until user agents do so, provide a way
to bypass the group.
- If search functions are provided, enable different
types of searches for different skill levels and preferences.
- Place distinguishing information at the beginning
of headings, paragraphs, lists, etc.
- Provide information about document collections (i.e.,
documents comprising multiple pages.).
- Provide a means to skip over multi-line ASCII art.
- Supplement text with graphic or auditory presentations
where they will facilitate comprehension of the page.
- Create a style of presentation that is consistent
across pages.
And if you use images and image maps (Priority 3)
- 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.
And if you use tables (Priority 3)
- Provide summaries for tables.
- Provide abbreviations for header labels.
- 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.
And if you use forms (Priority 3)
- Until user agents handle empty controls correctly,
include default, place-holding characters in edit
boxes and text areas.
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