作　　者： ; ; ; ;

机构地区： 武汉大学测绘遥感信息工程国家重点实验室

出　　处： 《计算机应用》 2015年第A01期178-182,共5页

摘　　要： 空间信息服务是Web服务在空间信息领域的应用,其元数据信息通常采用Web服务描述语言(WSDL)规范描述。然而,WSDL规范着重描述服务元数据的语法形态而欠缺语义描述,着重描述服务的功能特性而欠缺使用细节描述,尤其缺乏针对空间信息服务的约束表达,导致空间信息服务难以使用和推广,降低了用户体验。针对这种情况,提出一种基于WSDL语义扩展的轻量级空间信息服务描述模型。该模型在WSDL规范的基础上,针对常见的空间信息服务处理数据类型,扩展其语义描述和约束定义,丰富空间信息服务的描述信息,辅助空间信息服务的使用。在模型的基础上,设计了空间信息服务的使用方法,并在空间信息服务链可视化建模平台Geo Chaining中进行了实验验证,不仅提高了空间信息服务的执行成功率,还降低了空间信息服务的使用难度。 Geospatial information service is a special case of Web services applied in the field of spatial information and its metadata is usually described with WSDL specification. However, the existing WSDL specification focuses on describing the grammatical morpheme rather than semantic properties of service metadata. Furthermore, the existing WSDL specification describes the service functionality but ignores details of service usage, especially lacks the constraint expression for geospatial information services, which results in difficulties in using and promoting geospatial information services and bad user experience. To address this situation, a lightweight description model of geospatial information services based on the extension of WSDL was proposed. Based on WSDL specification, the proposed model extended the semantic description and constraint definition for common data types processed in geospatial information services, and then enriched the description and assisted usage of geospatial information services. On the basis of the model, a usage method was designed and then a geospatial information service case was performed on GeoChaining platform to verify the effectiveness of the model. Experimental result demonstrates that the proposed model not only improves the success rate of implementation of geospatial information services but also reduces the difficulties in using geospatial information services.

关 键 词： 服务描述语言 空间信息服务 描述模型 语义扩展 约束定义

领　　域： [自动化与计算机技术] [自动化与计算机技术]