code: public final void nameSpace (String namespace) {
      if (namespace == null || namespace.equals("")) {
        _namespace = "";
      } else {
        _namespace = namespace + ":";
      }
    }
docs: Set the namespace prefix to be prefixed to subseqyent tags. The namespace prefix
  allow different components to use the same tag without risk of confusion.
  
  @param namespace The name of the namespace prefix to be set