Set the end timestamp of the linguistic processor, set to None for the current time
        @type etimestamp: string
        @param etimestamp: version of the linguistic processor

def set_endTimestamp(self,etimestamp=None):
        """
        Set the end timestamp of the linguistic processor, set to None for the current time
        @type etimestamp: string
        @param etimestamp: version of the linguistic processor
        """
        if etimestamp is None:
            import time
            etimestamp = time.strftime('%Y-%m-%dT%H:%M:%S%Z')
        self.node.set('endTimestamp',etimestamp)