本体驱动的时空数据查询方法研究

Study on ontology-driven spatio-temporal data query

本体是由特定信息领域中的相关术语集合及这些术语之间的关联所组成的,是语义丰富的元数据,通过它可以获取关于底层数据库的相关信息。基于现有的地理数据库和已创建的地理信息领域本体,建立了适合于地理数据集的应用本体数据库;通过描述逻辑指定相应的规则知识,在空间数据库和本体数据库之间、本体库之间分别建立一定的关联关系,提出了本体驱动的时空数据查询方法。当需要对某个时空实体对象进行查询时,通过在本体数据库中进行的逻辑运算,从而得到查询结果,最后返回查询结果。并以数字烟草中烟草的种植查询为例,验证了该方法的可行性和有效性。

Ontology is composed of those terms and terminology set in the area of specific information and the links between them,and is rich in semantic metadata,which can access the underlying database of relevant information.Based on the existing GIS database and having established geographic information field ontology,the paper established an application ontology database which was suitable for geographic data.Description Logic designating the corresponding rules knowledge,between the spatial database and ontology database,the difference ontology database building a definite correlation,the paper proposed a method on ontology-driven spatial-temporal data query.When inquiring a spatial-temporal entity,through the logic computation of ontology database,we can gain the query results,and return the final results.In the same time,tobacco planting query of digital tobacco was tested to show that the method was feasible and effective.