Michael D. Siegel

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The Context Interchange strategy [5; 12] presents a novel solution to mediated data access in which semantic conflicts among heterogeneous systems are automatically detected and reconciled by a Context Mediator using the contexts associated with the systems involved. We have implemented these mediation services using the ECLiPSe1 platform and have deployed(More)
The Context Interchange strategy has been proposed as an approach for achieving interoperability among heterogeneous and autonomous data sources and receivers [25]. We have suggested [10] that this strategy has many advantages over traditional looseand tightcoupling approaches. In this paper, we present an underlying theory describing how those features can(More)
The availability of data on the Web and new data extraction technologies have made it increasingly easy to reuse existing data to create new databases and provide value-added services. Meanwhile, database creators have been seeking legal protection for their data, such as the European Union’s Database Directive. The legislative development shows that there(More)
We examine semantic interoperability problems in the fixed income securities industry and propose a knowledge representation architecture for context interchange mediation to support dynamic integration of autonomous database, web, and procedural sources of information. For sources and receivers sharing a common subject domain, the mediator’s reasoning(More)
Information aggregation, a service that collects relevant information from multiple sources, has emerged to help individuals and businesses to effectively use the growing amount of information on the Web. In this paper, we analyzed a number of characteristics of information aggregation, namely comparison, relationship, and intra-organization aggregation.(More)
In this paper, we propose an approach to address the issue of semantic interoperability between a data source and a data receiver in the framework of the context interchange architecture. A key component in this architecture is the context mediator, an intelligent agent which performs data conversions between the source and the receiver. In this paper, we(More)
The development of web technology has led to the emergence of web aggregation, a service that collects existing web data and turns them into more useful information. We review the development of both comparison and relationship aggregation and discuss their impacts on various stakeholders. The aggregator’s capability of transparently extracting web data has(More)