Does dockbook.xsl covers the whole?

Hi dev,
    I am trying to find the elements of docbook xmls which haven't styled by including docbbok.xsl in my test.xsl.Does it enough to see any kind of styling for any kind of element in the xml or are there any other xsl files that I must include to see different kind of styling for any other element?Also where can I find some sample docbook xmls which include most of possible elements in it?Thank you very much.

Sanjaya Liyanage