Type of content Tags
      <TH>
        text content
      <TH>
        text content
  <TBody>
    <TR>
      <TH>
        text content
      <TD>
        text content
Table Header Cell
<TH>
  ID=unique id
Cell with Header Style
<H1>
Header and Footer
no tags
Comment
no content
Decorative Graphical Object
no tags
Graphical Object other Group with Alt Text
<Figure>
  Alt=alt text (object type)
Graphical Object other than Shape without Alt Text
<Figure>
  Alt=blank
Shape without Alt Text, text, fill, outline, or hyperlink
no tags