CAJ | 학술논문

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GeoChaining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。
공간신식복무시Web복무재공간신식영역적응용,기원수거신식통상채용Web복무묘술어언( WSDL)규범묘술。연이,WSDL규범착중묘술복무원수거적어법형태이흠결어의묘술,착중묘술복무적공능특성이흠결사용세절묘술,우기결핍침대공간신식복무적약속표체,도치공간신식복무난이사용화추엄,강저료용호체험。침대저충정황,제출일충기우WSDL어의확전적경량급공간신식복무묘술모형。해모형재WSDL규범적기출상,침대상견적공간신식복무처리수거류형,확전기어의묘술화약속정의,봉부공간신식복무적묘술신식,보조공간신식복무적사용。재모형적기출상,설계료공간신식복무적사용방법,병재공간신식복무련가시화건모평태GeoChaining중진행료실험험증,불부제고료공간신식복무적집행성공솔,환강저료공간신식복무적사용난도。
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.