if ( installServices ) {
// Validators
HttpServlet validateQuery = new QueryValidator() ;
HttpServlet validateUpdate = new UpdateValidator() ;
HttpServlet validateData = new DataValidator() ;
HttpServlet validateIRI = new IRIValidator() ;
HttpServlet dumpService = new DumpServlet() ;
HttpServlet generalQueryService = new SPARQL_QueryGeneral() ;
addServlet(context, validateQuery, validationRoot + "/query", false) ;