To a certain extent, general relativity can be seen to be a relational theory, in which the only physically relevant information is the relationship between different events in space-time.
就某種程度而言，廣義相對論可以視作是一種關係理論，在這樣的理論中，物理上唯一要緊的訊息是時空中不同事件彼此間的關係。