Generating method of geographic information service composition designer based on model drive

Abstract

The invention relates to a generating method of a geographic information service composition designer based on model drive (MDA), which belongs to the technology of geographic information. In the invention, a model which is a platform specific model (PSM) for describing geographic space information service composition in three aspects of a service structure, a control structure and a data transmission structure is designed by taking the thought of MDA as the basis, and then PSW is translated into program source codes and the program source codes run to obtain a service composition designer software. The method is specially used for abstractly expressing the composition relation between geographic space information services and effectively reduces the complexity of the service composition and improves the efficiency and the interoperability of the service composition while establishing a geographic information service composition model architecture with unified regulations.

Description

technical field [0001] The patent of the present invention relates to geographic information technology, in particular to a model-driven (MDA)-based geographic information service composition designer generation method in the field of geographic space. Background technique [0002] At present, with the maturity of Web Service technology, more and more stable and easy-to-use Web services are shared on the network, but the functions provided by a single Web service are limited. In order to make full use of shared Web services, it is necessary to combine services . Existing Web service composition methods mainly include directed graph-based service composition, workflow-based service composition, semantic-based service composition, and model-driven service composition. To a certain extent, these methods can be said to provide some solutions for spatial information service composition, but there are still defects or deficiencies in these methods when dealing with spatial inform...

AI Technical Summary

Problems solved by technology

To a certain extent, these methods can be said to provide some solutions for spatial information service composition, but there are still defects or deficiencies in these methods when dealing with spatial information service composition

[0003] For the directed graph-based service composition method, the internal operations of the service are easily mixed with the operations of the service composition, making the service composition process difficult and error-prone

[0004] For the workflow-based service composition method, although large companies participate in the research and development and have many supporters, it has not yet become an industry standard; more importantly, these workflow languages ​​are aimed at commercial business processes rather than spatial information services. process, does not necessarily fully meet the requirements of spatial information service combinations, and does not have obvious advantages in expanding to intelligence

[0005] For semantic-based service composition methods, its ontology-based semantic reasoning ability is obviously a popular feature, but OWL-S (ontology description language for web services) still has insufficient support for automatic service composition: description logic-based There are limitations in expressing general rules, and the semantics of user preferences and constraints cannot be well represented, resulting in the automatic composition of services requiring user intervention

[0006] Although there has been some development in model-driven Web service composition, there is a lack of specialized models to define the description rules of geographic information service composition and establish a model architecture for standardized and consistent descriptions.

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