Notes

[NOTES SECTION This is where the important information is: for each slide.]

Notes

Web accessibility depends on more than web developers. This presentation tells you about different people and technology components that each have a vital role in providing Web accessibility. It:
[bulllets in slide]

Notes

Web content is the information in a web page or web application,
including text, images, forms, sounds, and such.

Notes

People ("users") use
Web browsers, media players,
assistive technologies, and other "user agents"
to get and interact with web content.

Notes

Web developers
use authoring tools and evaluation tools
to create web content.

Notes

Next, let's take a closer look at each component.
We'll use alternative text equivalents or "alt text" as an example of how
each component has a responsibility for Web accessibility...

Notes

• The alternative text equivalent or "alt text" for an image provides the same information in text as the image provides visually
  • That is, whatever information the image conveys visually, the alt text should convey in text
• Alt text is:
  • Read by screen readers and voicing browsers, which read aloud web pages and are used by people who are blind and people who cannot read
  • Displayed in text browsers in place of the image
  • Displayed in graphical browsers when images are not downloaded, which is common when using a mobile device

Notes

• Remember that web content is the information in a web site, including text, images, forms, sounds, and such. Web content also includes web code, called markup
• Alt text example:
  Web content has a role in providing alt text. Web content needs to include the alt text in the web page markup

Notes

• Web browsers, media players, and other "user agents" are software that you use to get and interact with web content
• Alt text example:
  User agents need to provide the alt text to users when needed, for example, graphical browsers display the alt text when the user turns off images

Notes

• Assistive technologies (AT) are software and hardware that people with disabilities use to interact with the Web, such as screen readers, screen magnification software, alternative keyboards, and voice input software and switches for people who cannot use a keyboard or mouse
• Alt text example:
  Assistive technologies need to provide the alt text to users, as needed; for example, screen readers read aloud the alt text

Notes

• Users' knowledge, skill, and strategies for using the Web are a component in Web accessibility
• Alt text example:
  Users need to know how to get the alt text from their user agent or assistive technology, as needed

Notes

• Developers include:
  • Web page authors, programmers, graphic designers, content producers, and such, including:
    • Developers with disabilities
    • Users who contribute content to the Web
• Alt text example:
  Developers need to provide the appropriate alt text wording

Notes

• Authoring tools are software or services to create and modify web content, including:
  • Web page editors
  • Word processing software that saves files in web formats
  • Multimedia tools
  • Content management systems (CMSs)
  • Websites that let users add content, such as blogs, wikis, and photo-sharing sites
• Alt text example:
  Authoring tools need to enable and encourage developers to provide alt text; for example, when the content developer puts an image on a page, the authoring tool prompts for alt text

Notes

• Evaluation tools help determine if a website meets accessibility guidelines, and include Web accessibility evaluation tools and markup (HTML) validators
• Alt text example:
  Web accessibility evaluation tools need to check that alt text exists and help check that it is equivalent

The Web Accessibility Evaluation Tools database provides a comprehensive list of tools

Notes

Web accessibility depends on every component fulfilling its responsibility.
How well each component supports accessibility makes a big difference...

Notes

• When one component has weak accessibility support, websites have accessibility barriers that make it difficult or impossible for people with disabilities to use them
• Alt text example in authoring tools:
  When it is difficult to add alt text with an authoring tool, fewer developers will provide alt text and then their web content is not accessible

Notes

• On the other hand, when one component has strong accessibility support, it can greatly impact accessibility overall, and the others are likely to follow
• It can be a positive cycle:
  • When authoring tools make it easy to implement a Web accessibility feature, developers are more likely to implement that feature in their content
  • When the accessibility feature is implemented in content, developers and users are more likely to demand that browsers and assistive technologies support it

Notes

Alt text examples in authoring tools:

• Web page editor:
  • When a web developer adds an image to a web page, the editor tool opens a dialog box asking for alt text and providing guidance on what wording to put for the alt text
• Content management system (CMS):
  • Stores alt text for images
  • When a developer adds an image, the CMS opens a dialog box asking if the stored alt text is appropriate for the context of the particular page, and if not, provides input for the developer to add different alt text and also stores that different text for the image

Notes

• Web Content Accessibility Guidelines (WCAG) addresses web content, and is used by developers, authoring tools, and accessibility evaluation tools
• Evaluation and Report Language (EARL) addresses the expression of website evaluation test results in a platform independent format
• Authoring Tool Accessibility Guidelines (ATAG) addresses authoring tools
• User Agent Accessibility Guidelines (UAAG) addresses web browsers and media players, including some aspects of assistive technologies
• Accessible Rich Internet Applications (WAI-ARIA) addresses dynamic web content and web applications developed with Ajax, DHTML, and other web technologies

Notes

• Essential Components of Web Accessibility provides more explanation of how the components need to work together for Web accessibility
• The WAI home page lists Web accessibility highlights and links to myriad resources, including Introduction to Web Accessibility