Markup Language

A system of annotations or tags embedded within text that define the structure, presentation, or semantics of content without being displayed as visible text themselves. In web accessibility, markup languages such as HTML, XML, ARIA, and SVG are fundamental because assistive technologies rely on the structural and semantic information encoded in markup to present content to users with disabilities. Properly structured markup — with semantic elements, labeling attributes, and role annotations — enables screen readers to convey document structure, form relationships, and interactive behaviors that would otherwise only be apparent visually.