src/main/java/org/jboss/util/xml/catalog/helpers/Namespaces.java
public static String getNamespaceURI(Element element) {
	String prefix = getPrefix(element);
	return getNamespaceURI(element, prefix);
    }
public static String getNamespaceURI(Element element) {
	String prefix = getPrefix(element);
	return getNamespaceURI(element, prefix);
    }
public static String getNamespaceURI ( Element element ) { String prefix = getPrefix ( element ) ; return getNamespaceURI ( element , prefix ) ; }
Returns the namespace URI for the namespace to which the
element belongs.

@param element The element.
@return The namespace URI associated with the namespace of the
element, or null if no namespace declaration exists for it.
Returns the namespace URI for the namespace to which the element belongs .