Accessibility Tree

A hierarchical data structure maintained by operating systems and browsers that represents the accessible elements of a user interface in a form that assistive technologies can interpret. The accessibility tree is derived from the visual UI but organized logically rather than visually, allowing screen readers and other assistive technologies to present interface elements in a meaningful order. Developers can manipulate the accessibility tree by aggregating multiple views into single accessible elements, decomposing views into multiple elements, specifying headers and navigation landmarks, and associating descriptive information with interactive controls.