}

    /**
     * Creates a {@link SchemaFactory} for W3C XML Schema.
     *
     * @return a {@link SchemaFactory} for W3C XML Schema
     */
    public static SchemaFactory newW3cXmlSchemaFactory() {
        return newW3cXmlSchemaFactory(false);
    }

    /**
     * Creates a {@link SchemaFactory} for W3C XML Schema.
     *
     * @param external
     *            If {@code true}, external access is allowed.

     * @return {@link Schema}
     */
    public static Schema newW3cXmlSchema(final File schema) {
        assertArgumentNotNull("schema", schema);
        return newSchema(SchemaFactoryUtil.newW3cXmlSchemaFactory(), schema);
    }

    /**
     * Generates a {@link Schema} for W3C XML Schema from a {@link Source}.
     *
     * @param schema