Known bugs
The following JAX Parser warnings during conversion:
[xslt] Warning: org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser: Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized.
[xslt] Warning: org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser: Property 'http://www.oracle.com/xml/jaxp/properties/entityExpansionLimit' is not recognized.
I was not able to use the converter hdoc_to_EPUB, there could be a problem with the format of the output.