关键词: 时空变化, 知识表达, 三元模型, 语义

Abstract: In order to eliminate the semantic heterogeneity in representing process of the spatio-temporal changes，a three-tuple model CAR for representing the spatio-temporal change is proposed based on the geographical object set before change and the geographical object set after change，change type and rules.In this model，the C denotes the change type；A denotes the attribute set；R denotes the judging rules of change type.The rule is described by the IF－THEN expressions.By the operations between R and A，the C is distinguished.This model overcomes the limitations of current methods.And more，the rules in this model can be easy realized in computer program.

Key words: spatio-temporal change, knowledge representation, three-tuple model, semantics