get.namespace.uri — Obtain URI for an element identified by a string containing qualified name
<xsl:template name="get.namespace.uri"> <xsl:param name="element.name"/> <xsl:param name="reference.node" select="."/> <xsl:param name="missing.namespace.warning" select="not(/t:templates/@t:missing-namespace-ok = 'yes')"/> ... </xsl:template>