@Override
        public void characters(char[] str, int offset, int len) throws SAXException {
            if (inData) {
                buffer.append(str, offset, len);
            } else if (inBody) {
                handler.characters(str, offset, len);
            }
        }
Parses wordml 2003 format Excel files.  These are single xml files
that predate ooxml.
<p>
See <a href="https://en.wikipedia.org/wiki/Microsoft_Office_XML_formats">https://en.wikipedia.org/wiki/Microsoft_Office_XML_formats</a>
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/xml/SpreadsheetMLParser.java