the Javadoc for StAX's XMLInputFactory:

https://java.sun.com/javase/6/docs/api/javax/xml/stream/XMLInputFactory.html#newInstance()

call out the use of stax.properties.
the current JAXP impl of StAX does not refer to these properties.
this is a violation of JSR 173.
it can also cause problems for people that want to use existing applications on J2SE 6.0.