*/
    public static SchemaFactory newRelaxNgSchemaFactory() {
        return newRelaxNgSchemaFactory(false);
    }

    /**
     * Creates a {@link SchemaFactory} for RELAX NG.
     *
     * @param external
     *            If {@code true}, external access is allowed.
     * @return a {@link SchemaFactory} for RELAX NG
     */
    public static SchemaFactory newRelaxNgSchemaFactory(final boolean external) {

     * @return {@link Schema}
     */
    public static Schema newRelaxNgSchema(final File schema) {
        assertArgumentNotNull("schema", schema);
        return newSchema(SchemaFactoryUtil.newRelaxNgSchemaFactory(), schema);
    }

    /**
     * Generates a {@link Schema} for RELAX NG from a {@link Source}.
     *
     * @param schema
     *            {@link Source} to load the RELAX NG. Must not be {@literal null}.