sed only for layout includes either th elements, a
                            summary attribute, or a caption element. This
                        is a failure because it uses structural (or semantic) markup only for
                        presentation. The intent of the HTML and XHTML table elements is to present data. </p>
      <p>Although not commonly used in a layout table, the following structural markup would also be failures of Success Criterion 1.3.1 if used in a layout table: </p>
      <ul>
  