[xsl] omit namespaces

["Jiang, Peiyun" <Peiyun.Jiang@xxxxxxxxxxxxxx>]

I have <h1 xmlns=""> tags in the resultant html documents. I want <h1> only.  Not all html tags has the xmlns="" part.

How are they produced? How can I change it?

Thanks.

Peiyun Jiang
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<xsl:output method="xml"
     doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN"
     doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";
     indent = 'no' 
     encoding = "UTF-8" 
     media-type = "text/xml" 
     omit-xml-declaration = "yes" />