Using agents for generation and maintenance of mediators

Journal of the Brazilian Computer Society

Vidal, Vânia Maria Ponte¹  Lóscio, Bernadette Farias¹  Salgado, Ana Carolina¹  Universidade Federal de Pernambuco¹  Universidade Federal do Ceará¹ 

关键词: Mediation system;    mediation queries;    data integration;    XML;    maintenance of mediators.;   

DOI  :  10.1590/S0104-65002002000100004

学科分类：农业科学（综合）

来源: Springer U K

【 摘 要 】

In this paper we present a system for data integration on the web, where an XML-based mediator plays a key role providing a homogeneous view of different data sources. One novelty of our approach is that we also propose solutions for the problems of generation and maintenance of mediators. Observe that, in dynamic environments, such as the Web, individual data sources may change not only their data but also their schemas. As a result, whenever a local schema changes, the mediator needs to be updated to reflect the modifications. The proposed system uses agents to support mediator generation and maintenance. We specify a set of tasks that must be performed in order to support both generation and maintenance of mediators. In our approach, we use correspondence assertions for specifying the semantics of XML-based mediators.

【 授权许可】

Unknown