public String getDataformXSLT() {
        return dataformXSLT;
    }
Returns the URL of an XSL transformation which can be applied to the payload format
in order to generate a valid Data Forms result that the client could display
using a generic Data Forms rendering engine.

@return the URL of an XSL transformation which can be applied to the payload format.
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/Node.java