bug fix in xml_driver to handle empty text
bug fix in xml_driver to handle empty text

funginstitute/patentprocessor,funginstitute/patentprocessor,yngcan/patentprocessor,yngcan/patentprocessor,nikken1/patentprocessor,funginstitute/patentprocessor,nikken1/patentprocessor,nikken1/patentprocessor,yngcan/patentprocessor