Roles

• Used to describe widgets and provide document markers
• Specifications:
  • xhtml2 role element
  • Roles for Accessible Rich Internet Applications
• Must use "wairole" namespace to "http://www.w3.org/2005/01/wai-rdf/GUIRoleTaxonomy#"
• Examples:
  • navigation
  • checkbox
  • radio
  • tree
  • grid
  • many others
• Several roles are needed to describe some widgets, for example Tree, Menu, Grid and many others