* comment: Whether to append body content from files.
     * @return The determination, true or false. (if not found, exception but basically no way)
     */
    boolean isCrawlerDocumentFileAppendBodyContent();

    /**
     * Get the value for the key 'crawler.document.file.default.lang'. <br>
     * The value is, e.g.  <br>
     * comment: Default language for file documents.