/** The key of the message: Excluded URLs For Indexing */
    public static final String LABELS_EXCLUDED_DOC_URLS = "{labels.excludedDocUrls}";

    /** The key of the message: Hostname */
    public static final String LABELS_HOSTNAME = "{labels.hostname}";

    /** The key of the message: ID */
    public static final String LABELS_ID = "{labels.id}";

    /** The key of the message: Included Paths For Crawling */