functions shall be executable from a keyboard where the function itself or the
result of performing a function can be discerned textually.
2. Applications shall not disrupt or disable activated features of other products
that are identified as accessibility features, where those features are
developed and documented according to industry standards. Applications also
shall not disrupt or disable activated features of any operating system that are
identified as accessibility features where the application programming
interface for those accessibility features has been documented by the
manufacturer of the operating system and is available to the product
developer.
3. A well defined on-screen indication of the current focus shall be provided
that moves among interactive interface elements as the input focus changes.
The focus shall be programmatically exposed so that assistive technology can
track focus and focus changes.
4. Sufficient information about a user interface element, including the identity,
operation and State of the element, shall be available to assistive technology.
When an image represents a program element, the information conveyed by
the image must also be available in text.
5. When bitmap images are used to identify controls, status indicators, or other
programmatic elements, the meaning assigned to those images shall be
consistent throughout an application's performance.
6. Textual information shall be provided through operating system functions for
displaying text. The minimum information that shall be made available is text
content, text input caret location, and text attributes.
7. Applications shall not override user selected contrast and color selections and
other individual display attributes.
8. When animation is displayed, the information shall be displayable in at least
one non-animated presentation mode at the option of the user.
9. Color-coding shall not be used as the only means of conveying information,
indicating an action, prompting a response, or distinguishing a visual
element.
10. When a product permits a user to adjust color and contrast settings, a variety
of color selections capable of producing a range of contrast levels shall be
provided.
11. Software shall not use flashing or blinking text, objects, or other elements
having a flash or blink frequency greater than 2 Hz and lower than 55 Hz.
12. When electronic forms are used, the form shall allow people using assistive
technology to access the information, field elements, and functionality
required for completion and submission of the form, including all directions
and cues.
Software Voluntary Accessibility Purchasing Template
We would like to thank the Missouri Office of Information Technology Standard and the Federal Department of Educations Assistive Technology Program for the use of their software guidelines in the creation of our institutional policy.