/rhino/xmlimplsrc/org/mozilla/javascript/xmlimpl/Namespace.java
uri = ns.prefix( ) ;
uri = ns.uri ( ) ;
Namespace constructNamespace(Object uriValue) { String prefix; String uri; if (uriValue instanceof Namespace) { Namespace ns = (Namespace) uriValue; prefix = ns.prefix(); <extra_id_0> } else if (uriValue instanceof QName) { QName qname = (QName) uriValue; uri = qname.uri(); if (uri != null) { prefix = qname.prefix(); } else {