Theory research about spatial information service topology relationship

This paper presents a new method to describe the relationship between services, which refers to the basic concepts of geometric topology. It uses the relationships between points and lines to describe that from input and output information flow in the service, further to produce a static invoking relationship between services. According to this abstract relationship between the points and lines of the spatial information service, it can generate a valid topological relationship between the services with point elements, line elements and topology relationship tables. The topological relationship between services can put into one-to-one relationship with information processing each process, and thus can improve the speed and performing efficiency of the service combination and matching. This article defines a concept of the point elements and line elements in the service topology, describes the properties of the elements, sets up four kinds of topological relationships and their corresponding information process. A proposal of the method of establishing topological service description is provided. Ultimately there are specific examples to represent the construction process of services topological relationships and their final results.