CAJ | 학술논문

从关系数据库到本体的语义映射对于实现关系数据库和本体之间的互操作具有十分重要的作用.然而,关系数据库模式和本体的演化都会造成这些语义映射的失效,只有准确定位受影响的映射集合才能进行进一步的映射维护工作.提出了一种映射失效检测方法,首先通过对关系数据库模式(本体)的新旧版本进行比较来求取变化元素集合和合理演化路径,然后基于该变化元素集合生成查询测试集,并且借助相应的映射将查询测试集中的查询重写.最后,根据重写后的查询能否返回合法实例,就可以判定查询重写所使用的映射是否失效.
종관계수거고도본체적어의영사대우실현관계수거고화본체지간적호조작구유십분중요적작용.연이,관계수거고모식화본체적연화도회조성저사어의영사적실효,지유준학정위수영향적영사집합재능진행진일보적영사유호공작.제출료일충영사실효검측방법,수선통과대관계수거고모식(본체)적신구판본진행비교래구취변화원소집합화합리연화로경,연후기우해변화원소집합생성사순측시집,병차차조상응적영사장사순측시집중적사순중사.최후,근거중사후적사순능부반회합법실례,취가이판정사순중사소사용적영사시부실효.
The semantic mappings between relational database and ontology are critical to the implementation of interoperability between them. However, these mappings would be invalid if schema (or ontology) evolved, and it is a pre-requisite work to find the affected mappings while Some change occurs. In this paper, by comparing the new version and old version of the schema (ontology), rational evolution paths between the old version and new version were discovered, and a set of changed elements were detected. Based on the set of changed elements, we can design a query testing set, and queries in the testing set can be reformulated in virtual of corresponding mappings. Finally, if the reformulated queties can not return a valid result set, the mappings used in reformulating queries are proved to be invalid.