The 4.7 version of the doc (for example, http://doc.qt.nokia.com/4.7-snapshot/qwidget.html) does not respect XHTML 1.0 strict validation.

Result of a validator : http://validator.w3.org/check?verbose=1&uri=http%3A%2F%2Fdoc.qt.nokia.com%2F4.7-snapshot%2Fqwidget.html

If you want to parse the html code with an XML parser like QXmlQuery, it's impossible cause of errors without changing manuelly the html code.