xsd:string An Entity that has characteristics which change over time is at a point or in a phase of its development in which, compared to other actual or expected stages of development, it possesses extremely high or low powers or intensity. The high or low level of development correlates with the occurrence of a Marker, a product produced by the Entity or an event in which it participates, which is indicative of the Entity's abilities or intensity. The Tang Dynasty was the high point of the Silk Road's importance. Meeting Fiona Bennett was the LOW POINT of my summer. It must be remembered that this man was born at the zenith of the Victorian age and witnessed the glory of Britain at her greatest. But Lubitsch was at the high point of his genius, and he has made a masterpiece not to be missed.