/** The key of the configuration. e.g. virtual_host */
    String INDEX_FIELD_virtual_host = "index.field.virtual_host";

    /** The key of the configuration. e.g. content_title */
    String RESPONSE_FIELD_content_title = "response.field.content_title";

    /** The key of the configuration. e.g. content_description */
    String RESPONSE_FIELD_content_description = "response.field.content_description";

        if (Constants.TEXT_FRAGMENT_TYPE_QUERY.equals(fessConfig.getQueryHighlightTextFragmentType())) {
            docMap.put(Constants.TEXT_FRAGMENTS, viewHelper.createTextFragmentsByQuery());
        }

        // ContentTitle
        if (viewHelper != null) {
            docMap.put(fessConfig.getResponseFieldContentTitle(), viewHelper.getContentTitle(docMap));