【摘要】 基于对时空语义的研究,提出了一种兼容ER方法的时空概念建模方法STXER,论述了它的时空语义基础以及时空数据库概念建模过程,给出了STXER的实现和建模实例。STXER支持丰富的时空语义,可以满足不同时空应用的需求。更多还原

【Abstract】 Based on the study on spatial-temporal semantics,an ER-compatible conceptual modeling approach to spatial-temporal database design is proposed,which is named STXER.The spatial-temporal semantics foundation and the spatial-temporal conceptual modeling procedures are discussed,and the implementation and a modeling example of STXER are presented.The STXER approach can support rich spatial-temporal semantics and thus can be used to suit different types of spatial-temporal applications.更多还原