What AT needs from IT

• For magnification, speech, and/or Braille; and to automatically read & highlight content, AT needs:

• • To know where all of the user interface elements are
  • Know what UI elements are (radio button, checkbox, ...)
  • Know where the text is, what the text is, text attributes
  • Know where the focus is, the text caret, text selection
  • Know how elements related to each other (labels, etc.)
  • Know the precise text content location, to highlight it
  • Know document content structure for rich content access
  • Have final control over what is drawn to the screen