Default XML namespace, JDOM, and XPath

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XPath 1.0 doesn’t support the concept of a default namespace (XPath 2.0 does).
Any unprefixed tag is always assumed to be part of the no-name namespace.

When using XPath 1.0 you need something like this:

public static void main(String args[]) throws Exception {
    SAXBuilder builder = new SAXBuilder();
    Document d = builder.build("xpath.xml");
    XPath xpath = XPath.newInstance("x:collection/x:dvd");
    xpath.addNamespace("x", d.getRootElement().getNamespaceURI());
    System.out.println(xpath.selectNodes(d));
}

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