地理数据服务语义表达与自动发现

Semantic description and automatic discovery for GeoData Web Service

地理数据的复杂性和不支持语义的服务发现机制常常导致数据用户很难准确地找到自己真正需要的地理数据服务。为了便于用户从语义上快速准确地找到自己需要的地理数据服务,本文首先构建了地理元数据本体,并采用元数据本体来描述地理数据服务的相关语义信息,接着提出了基于本体的概念间语义相似度计算的算法,最后在该算法的基础上,通过语义匹配来实现地理数据服务基于语义的自动发现。实验结果表明,文中的方法可以提高地理数据服务发现的准确率和智能化程度。

Due to the complexity of GeoData and no semantic supporting Web Service discovery,it is very hard for data users to accurately find the GeoData Web Service they really want.In order to make it easy for users to quickly and accurately find the GeoData Web Service they want in semantic level,this article firstly constructed Geographical MetaData Ontology,and used MetaData Ontology to describe the related semantic information for GeoData Web Service.Then it came up with a new way of computing the degree of semantic similarity among concepts based on Ontology.Finally,it realized the automatic discovery for GeoData Web Service based on semantic matching.The experiment result showed that the way in this article could improve the accuracy and the degree of intelligentizing for GeoData Web Service discovery.