A Strategy to Revise the Constraints of the Mediated Schema

In this paper, the authors present a three-level mediator based framework for linked data integration. In the approach, the mediated schema is represented by a domain ontology, which provides a conceptual representation of the application. Each relevant data source is described by a source ontology, published on the Web according to the Linked Data principles. Each source ontology is rewritten as an application ontology, whose vocabulary is restricted to be a subset of the vocabulary of the domain ontology. The main contribution of the paper is an algorithm for reformulating a user query into sub-queries over the data sources. The reformulation algorithm exploits inter-ontology links to return more complete query results. The approach is illustrated by an example of a virtual store mediating access to online booksellers.

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“…This section presents an example, adapted from (Casanova et al, 2009), of a virtual store mediating access to online booksellers.…”

Section: Running Examplementioning

confidence: 99%

Query Processing in a Mediator Based Framework for Linked Data Integration

Vidal

Macêdo

Pinheiro

et al. 2011

International Journal of Business Data Communications and Networking

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A Strategy to Revise the Constraints of the Mediated Schema

Casanova

Lauschner

Leme

et al. 2009

Conceptual Modeling - ER 2009

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An Ontology-Based Framework for Geographic Data Integration

Vidal

Sacramento

Macêdo

et al. 2009

Lecture Notes in Computer Science

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Ontologies have been extensively used to model domain-specific knowledge. Recent research has applied ontologies to enhance the discovery and retrieval of geographic data in Spatial Data Infrastructures (SDIs). However, in those approaches it is assumed that all the data required for answering a query can be obtained from a single data source. In this work, we propose an ontology-based framework for the integration of geographic data. In our approach, a query posed on a domain ontology is rewritten into sub-queries submitted over multiples data sources, and the query result is obtained by the proper combination of data resulting from these sub-queries. We illustrate how our framework allows the combination of data from different sources, thus overcoming some limitations of other ontology-based approaches. Our approach is illustrated by an example from the domain of aeronautical flights.

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A Strategy to Revise the Constraints of the Mediated Schema

Cited by 6 publications

References 7 publications

Query Processing in a Mediator Based Framework for Linked Data Integration

Query Processing in a Mediator Based Framework for Linked Data Integration

A Strategy to Revise the Constraints of the Mediated Schema

An Ontology-Based Framework for Geographic Data Integration

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