line 10 column 1 - Error: <asset> is not recognized!
line 10 column 1 - Warning: discarding unexpected <asset>
line 11 column 1 - Error: <thumbnailimage> is not recognized!
line 11 column 1 - Warning: discarding unexpected <thumbnailimage>
line 9 column 1 - Warning: missing </div> before <caption>
line 12 column 1 - Warning: inserting implicit <table>
line 13 column 1 - Error: <width> is not recognized!
line 13 column 1 - Warning: discarding unexpected <width>
line 13 column 8 - Warning: plain text isn't allowed in <table> elements
line 12 column 1 - Info: <table> previously mentioned
line 13 column 10 - Warning: discarding unexpected </width>
line 14 column 1 - Error: <height> is not recognized!
line 14 column 1 - Warning: discarding unexpected <height>
line 14 column 9 - Warning: plain text isn't allowed in <table> elements
line 12 column 1 - Info: <table> previously mentioned
line 14 column 11 - Warning: discarding unexpected </height>
line 15 column 1 - Warning: discarding unexpected </thumbnailimage>
line 16 column 1 - Warning: discarding unexpected </asset>
line 17 column 1 - Warning: discarding unexpected </div>
line 12 column 1 - Warning: missing </table> before </body>
line 9 column 1 - Warning: missing </div>

Accessibility Checks: Version 0.1

line 1 column 1 - Access: [3.3.1.1]: use style sheets to control presentation.
line 4 column 1 - Access: [13.2.1.1]: Metadata missing.
line 12 column 1 - Access: [5.5.2.1]: <table> missing <caption>.
line 12 column 1 - Warning: trimming empty <caption>
line 12 column 1 - Warning: trimming empty <table>
Info: Doctype given is "-//W3C//DTD XHTML 1.0 Transitional//EN"
Info: Document content looks like XHTML 1.0 Strict
17 warnings, 4 errors were found!

This document has errors that must be fixed before
using HTML Tidy to generate a tidied up version.

For further advice on how to make your pages accessible
see http://www.w3.org/WAI/GL and http://www.aprompt.ca/Tidy/accessibilitychecks.html.
. You may also want to try
"http://www.cast.org/bobby/" which is a free Web-based
service for checking URLs for accessibility.

About HTML Tidy: https://github.com/htacg/tidy-html5
Bug reports and comments: https://github.com/htacg/tidy-html5/issues
Or send questions and comments to: https://lists.w3.org/Archives/Public/public-htacg/
Latest HTML specification: http://dev.w3.org/html5/spec-author-view/
Validate your HTML documents: http://validator.w3.org/nu/
Lobby your company to join the W3C: http://www.w3.org/Consortium