Refer to: https://jaxp.dev.java.net/issues/show_bug.cgi?id=63

attributes with defined prefix (namespace) is accessible with "empty" namespace.

for example

xml: <prefix:rootElem xmlns:prefix="something" prefix:attr="attrValue" />

code:
    public void startElement(String uri, String localName, String qName,
Attributes atts) throws SAXException {

        super.startElement(uri, localName, qName, atts);

        String attr_WithNs = atts.getValue("something", "attr");
        String attr_NoNs = atts.getValue("", "attr");

}


attr_NoNs should be null but atts.getValue returns same thing as is set in
attr_WithNs.

This is confirmed regression (introduced in JDK6_18, present in OpenJDK7).