Glossary

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ARIA Hidden(also: aria-hidden Attribute)

An WAI-ARIA attribute (aria-hidden="true") that removes an element and its descendants from the accessibility tree, making them invisible to screen readers and other assistive technologies while potentially remaining visually visible. ARIA hidden is used to suppress decorative…

ARIA Live Region(also: Live Region, ARIA Live)

An ARIA live region is a section of a web page marked with the aria-live attribute that announces dynamic content changes to assistive technologies without requiring user focus to move to the updated area. Live regions are essential for making real-time updates — such as status…

ARIA Live Region(also: Live Region, aria-live)

A section of a web page marked with the aria-live attribute that is dynamically updated and should be announced by assistive technologies when changes occur, even if the user's focus is elsewhere. Live regions have politeness levels: "polite" (announced at the next convenient…

Accessibility API Mapping(also: AAM, Accessibility API Mappings, Acc API Mapping)

Accessibility API Mappings (AAMs) are W3C specifications that define how the semantics of web content technologies — such as HTML, SVG, and WAI-ARIA — correspond to features in platform accessibility APIs like MSAA/UIA on Windows, ATK/AT-SPI on Linux, and NSAccessibility on…

Aria-Live(also: ARIA Live Region, Live Region)

An ARIA attribute (aria-live) used to designate regions of a web page whose content may change dynamically, ensuring that assistive technologies announce updates to users without requiring them to navigate to the changed content. The attribute accepts values of "polite" (waits…

Live Region(also: ARIA Live Region, aria-live)

A section of a web page that is dynamically updated and announced by assistive technologies without requiring the user to navigate to it. Live regions are defined using the WAI-ARIA aria-live attribute, which can be set to "polite" (announced when the screen reader is idle),…

Role Attribute(also: ARIA Role, WAI Role)

An HTML attribute that defines the purpose or type of a user interface element, communicating its function to assistive technologies. Originally proposed as part of the XHTML namespace-based approach described by Gibson and Schwerdtfeger at IBM, the role attribute became a…

WAI-ARIA(also: ARIA, Accessible Rich Internet Applications, WAI-ARIA Specification)

A W3C technical specification that defines a set of HTML attributes (roles, states, and properties) to make dynamic web content and custom user interface widgets accessible to people using assistive technologies such as screen readers. ARIA allows developers to communicate the…

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