getting rid of namespace definition

Consider this very very simple stylesheet :

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:sql="http://apache.org/cocoon/SQL/2.0">
    
	<xsl:template match="/root">
      	<root/>
	</xsl:template>
</xsl:stylesheet>

The transformer automatically copies the sql: namespace definition into the
root node produced after the transformation. I want to disable that, how can I
do ?

Philippe