@Override
    public void registerResources(ResourceRegistrar registrar) {
      registrar.addStdResource(RNG_NAMESPACE, "/resources/relaxng.rng", getClass());
      registrar.addStdResource(HtmlUtil.SVG_NAMESPACE, "/resources/html5-schema/svg20/svg20.rnc", getClass());
      registrar.addStdResource(HtmlUtil.MATH_ML_NAMESPACE, "/resources/html5-schema/mml3/mathml3.rnc", getClass());
      registrar.addIgnoredResource("http://relaxng.org/ns/compatibility/annotations/1.0");
    }
@Override
    public void registerResources(ResourceRegistrar registrar)