private void parseMetadata(TikaInputStream tis, Metadata embeddedMetadata)
            throws IOException, SAXException {
        try {
            embeddedDocumentExtractor.parseEmbedded(tis, new EmbeddedContentHandler(xhtml),
                    embeddedMetadata, true);
        } catch (IOException e) {
            handleCatchableIOE(e);
        }
    }
Format used for signature dates
TODO Make this thread-safe
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/main/java/org/apache/tika/parser/pdf/AbstractPDF2XHTML.java