I don't see how anybody could be using this tool to their advantage, because it is broken. That is, it just plain does not work, returning a error message.

I assume it worked until some recent update...

(I am referring to the demo on the website.)

Works just fine for me, jtara. What error message are you getting? Bear in mind that the tool expects a full URI to a resource, not just the domain name, ie. http://www.example.com/ rather than www.example.com.

The tool itself is a simple and interesting little utility to see if you can extract the correct meaning from the way the page uses markup. It can be useful in pointing out potentially confusing associations. A good example which I tried showed that the contents of a sidebar (using

h4

elements for each header) were seen as being appended on the final node created by the article links in the main content area (which were marked up with

h3

elements). The fix would be to have a

h2

or

h3

element introducing the sidebar sub-headings.

I get this error message:

Using org.apache.xerces.parsers.SAXParser
Exception net.sf.saxon.trans.DynamicError: org.xml.sax.SAXParseException: Content is not allowed in prolog.
org.xml.sax.SAXParseException: Content is not allowed in prolog.

It shows the meta data and the organizational outline for the page. This is useful, and it's also available as an option when you validate your HTML.