xml namespace

Hi,
     I am conversant with xml/xsl hence this question.
I am trying to generate a html file from my xml using xsl and 
javax.xml.transform.transformer class. When i include the namespace in the 
xml root node (uri) i dont get any xml but if i dont include the html is 
generated according to the xsl. Is there a way i can force the transformer 
to not validate the uri?
thanks,
mridula