// Uri uri = new Uri (namespace, slideScope);
Uri uri = namespace.getUri(token.getSlideToken(), slideScope);
AbstractStore store = (AbstractStore)uri.getStore();
// todo: can we make the query storeindependant?
String className = (String)store.getParameter
(BasicSearchLanguage.BASIC_QUERY_CLASS);
if (className != null) {
try {
Class queryClass = Class.forName (className);