/** The key of the configuration. e.g. [a-zA-Z0-9_]+ */
    String USER_CODE_PATTERN = "user.code.pattern";

    /** The key of the configuration. e.g. Administrator */
    String MAIL_FROM_NAME = "mail.from.name";

    /** The key of the configuration. e.g. root@localhost */
    String MAIL_FROM_ADDRESS = "mail.from.address";

    /** The key of the message: System Error */
    public static final String LABELS_system_error_title = "{labels.system_error_title}";

    /** The key of the message: Please contact your site administrator. */
    public static final String LABELS_contact_site_admin = "{labels.contact_site_admin}";

    /** The key of the message: Invalid Request Format. */