中文摘要：

随着各种网格服务的积累和版本升级,知识网格平台中知识发现算法和辅助决策模拟模型日益增多,如何快速发现和定位满足用户需求的网格服务,是制约平台服务质量的重要因素。对网格服务模型进行有效描述,并最终形成统一的网格服务模型元数据标准,是推进网格服务模型广泛共享的有效手段。因此,在对建立网格服务模型元数据标准的必要性进行简要分析之后,文章给出了网格环境中服务模型元数据的基本框架和内容,采用二级元数据模型对包括标识信息、权限信息、运行条件、参数信息、分类信息、内容信息、参考信息等7个方面的模型元数据进行定义与说明;随后采用可扩展标记语言（XML）作为描述语法对网格服务模型元数据进行组织和管理,并对基于B/S结构的网格服务模型元数据管理模块设计与实现进行介绍。最后,将网格服务模型元数据管理模块紧密集成到研究小组现有的地理知识网格服务平台GeoKS-G rid中,实现网格服务模型的规范化管理,并对网格服务模型元数据的网格工作流制定、执行和调度,进行了初步的研究与探讨。

英文摘要：

A model metadata standard is basically a set of rules on recording model information,more specifically,the rules for recording information about a computer model.While the number of computer models is growing at quite a rate in the network environment,the need for a standardized metadata format for models description is growing with each new model.Only through a standardized format can models be compared and contrasted to find a model fit for a particular application,and only through model metadata can a potential user be able to better decide which model is of the most appropriate.In a word,it is an effective means to share and distribute the knowledge and experience gained in model technology.So,in this paper,we briefly describe the necessity to construct model metadata in information system,and provide a basic framework for grid services model metadata in grid environment.Hence,a two level metadata model is adopted to define and to illuminate model metadata,which is held to consist of an identifier,permission indication,run conditions,model parameters,type information,model details,and references.The first four items are the contents of basic set which are indispensable,and the last four items are the contents of extended set which are optional.The sum of the basic set and the extended set is the global method metadata.Then we explain the principle of model metadata organization and management by using XML as the description language,and the realization of model metadata management module based on B/S architecture,where model metadata is organized and stored in XML file,and it is explored in web browsers.It would be a good way to organize the services discovered in the grid test-bed,and it would also be a step in the direction of producing a unified method of recording models.Finally,through the creation and integration of the model metadata management module into an existing geospatial knowledge services grid platform GeoKS-Grid,we analysis and discuss the application strategy and process of model metadata un