A Framework for Ontology-Based Top-K Global Schema Generation

A Framework for Ontology-Based Top-K Global Schema Generation
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基于本体的 Top-K 全局模式生成框架

DOI:
10.1007/s13740-016-0075-2
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发表时间:
2017-03
影响因子:
--
通讯作者:
Feng Tian
Feng Tian
中科院分区:
--
文献类型:
--
作者:
Longzhuang Li;Yuzhe Wei;Feng Tian

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全局模式生成是指在现有的异构局部模式和模式匹配算法生成的对应关系的基础上,生成一个统一的合并模式。现有的模式集成方法只针对平面模式结构,不能很好地处理层次模式结构,并且由于局部模式中的弱实体,可能会在全局模式中产生冗余信息。为了解决这类问题,本文提出了一个基于本体的top-kglobal模式生成框架。该框架采用本体作为基本合并模型,以创建更高质量的全局模式,但较少的用户参与,因为本体可以提供语义和详细的约束,并开发方法来保持层次结构和删除冗余实体。该方法包括三个连续的步骤:(1)本地模式转换为本地本体;(2)本地本体合并和top-kglobal本体生成;(3)用户选择一个合并的全局本体,这是自动转换回全局模式。与现有的最先进的模式集成方法相比,所提出的方法更好地保留了层次结构,并删除冗余信息。结果,生成的全局模式的质量更高。
Global schema generation is the problem of generating a unified and merged schema based on existing heterogeneous local schemas and a set of correspondences which are generated by a schema-matching algorithm. The existing schema integration approaches only target the flat schema structure, but cannot handle hierarchical schema structure well, and may produce redundant information in the global schema due to the weak entities in local schemas. To deal with these kinds of problems, a framework for ontology-based top-kglobal schema generation is proposed in this paper. The framework employs ontology as a base-merging model to create the global schema with higher quality but less user involvement, because ontology can provide semantic and detailed constraints and develop ways to preserve the hierarchical structure and remove redundant entities. The proposed approach consists of three contiguous steps: (1) local schemas are converted to local ontologies; (2) local ontologies are merged and top-kglobal ontologies are generated; (3) the user chooses one merged global ontology, which is converted automatically back to the global schema. After comparing the proposed approach with an existing state-of-the-art schema integration approach, the proposed approach better preserves the hierarchical structure and removes the redundant information. As a result, the quality of the generated global schema is higher.
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