@Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        if (inBinaryData) {
            base64BinaryDataBuffer.append(ch, start, length);
            return;
        }
        // only forward content of tags from text:-namespace
        if (completelyFiltered == 0 && nodeDepth > 0 && textNodeStack.get(nodeDepth - 1)) {
            if (!hasWrittenStartStyleTags) {
                updateStyleTags();
                hasWrittenStartStyleTags = true;
            }
            super.characters(ch, start, length);
        }
    }
Mappings between ODF tag names and XHTML tag names
(including attributes). All other tag names/attributes are ignored
and left out from event stream.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-miscoffice-module/src/main/java/org/apache/tika/parser/odf/OpenDocumentBodyHandler.java