Dynamic description logic model for data integration

	Dynamic description logic model for data integration
	Guoshun Hao 1; Shilong Ma 1; Yuefei Sui 2; Jianghua Lv 1
	2008
发表期刊	Frontiers of Computer Science in China
ISSN	1673-7350
卷号	2 期号:3 页码:306
摘要	Data integration is the issue of retrieving and combining data residing at distributed and heterogeneous sources, and of providing users with transparent access without being aware of the details of the sources. Data integration is a very important issue because it deals with data infrastructure issues of coordinated computing systems. Despite its importance, the following key challenges make data integration one of the longest standing problems around: 1) how to solve the system heterogeneity; 2) how to build a global model; 3) how to process queries automatically and correctly; and 4) how to solve semantic heterogeneity.This paper presents an extended dynamic description logic language to describe systems with dynamic actions. By this language, a universal and unified model for relational database systems and a model for data integration are presented. This paper presents a universal and unified description logic model for relational databases. The model is universal because any relational database system can be automatically transformed to the model; it is unified because it integrates three essential components of relational databases together: description logic knowledge bases modeling the relational data, atomic modalities modeling the atomic relational operations, and combined modalities modeling the combined relational operations-queries.Furthermore, a description logic model for data integration is proposed which contains four layers of ontologies. Based on the model, a solution for each key challenge is proposed: a universal model eliminates system heterogeneity; a novel global model including three ontologies is proposed with some important benefits; a query process mechanism is provided by which user queries can be decomposed to queries over the sources; and for solving the semantic heterogeneity, this paper provides a framework under which semantic relations can be expressed and inferred.In summary, this paper presents a dynamic knowledge base framework by an extended description logic language. Under the framework, databases and data integration systems are modeled, the query processing problem is converted into a semantic-preserving rewriting problem, and many other issues of data integration can be formally studied.
关键词	data integration dynamic description logics relational databases query processing knowledge representation
语种	英语
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/35384
专题	中国科学院计算技术研究所期刊论文_中文
作者单位	1.北京航空航天大学 2.中国科学院计算技术研究所
推荐引用方式 GB/T 7714	Guoshun Hao,Shilong Ma,Yuefei Sui,et al. Dynamic description logic model for data integration[J]. Frontiers of Computer Science in China,2008,2(3):306.
APA	Guoshun Hao,Shilong Ma,Yuefei Sui,&Jianghua Lv.(2008).Dynamic description logic model for data integration.Frontiers of Computer Science in China,2(3),306.
MLA	Guoshun Hao,et al."Dynamic description logic model for data integration".Frontiers of Computer Science in China 2.3(2008):306.