xml.instruct! xml.tag! 'soap:Envelope', 'xmlns:soap' => 'schemas.xmlsoap.org/soap/envelope/',

      'xmlns:xsi' => 'http://www.w3.org/2001/XMLSchema-instance' do
xml.tag! 'soap:Body' do
  xml.tag! "soap:#{wsdl.action}Response" do
    params.each do |key, value| 
      xml.tag! key, value
    end
  end
end

end