The examples online and within the XSLT spec, it doesn't state that it must
require an "xmnls" attribute http://www.w3.org/TR/xslt
From looking at the simple example
XSLT on the web page, which works perfectly. But it shouldn't be like that,
as a user, we just visit the XML file and it should render.
According the the spec, the xsl:stylesheet can be:
But that will result in a blank page, if we add xmlns="" attribute there,
it works just fine.