@Override
    protected ContentHandler getContentHandler(ContentHandler ch, Metadata metadata,
                                               ParseContext context) {

        return new TeeContentHandler(super.getContentHandler(ch, metadata, context),
                new ExcelMLHandler(ch));
    }
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