public static List<ExternalParser> read(Document document) throws TikaException, IOException {
        return read(document.getDocumentElement());
    }
Builds up ExternalParser instances based on XML file(s)
which define what to run, for what, and how to process
any output metadata.
Typically used to configure up a series of external programs
(like catdoc or pdf2txt) to extract text content from documents.

<pre>
 TODO XML DTD Here
</pre>
tika-core/src/main/java/org/apache/tika/parser/external/ExternalParsersConfigReader.java