require 'soap/wsdlDriver' 
WSDL_URL = 'http://riodb.ibase.aist.go.jp/rcmg/ws/gpdb/services/GPDB.wsdl'
driver = SOAP::WSDLDriverFactory.new(WSDL_URL).create_rpc_driver

print  driver.searchTaxId("6239", "list", "0", "10")