*/
    boolean isAllowCompound ( String command );


    /**
     * Machine identifier
     * 
     * ClientGuid, ... are derived from this value.
     * 
     * Normally this should be randomly assigned for each client instance/configuration.
     * 
     * @return machine identifier (32 byte)
     */
    byte[] getMachineId ();


    /**
     * 
     *