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What is Mediator

Handbook of Research on Innovations in Database Technologies and Applications: Current and Future Trends
Systems that filter information from one or more data sources that are usually accessed using wrappers. The main goal of these systems is to allow users to make complex queries over heterogeneous sources as if it were a single one, using an integration schema. Mediators offer user interfaces for querying the system based on the integration schema. They transform user queries into a set of subqueries that other software components (the wrappers), which encapsulate data sources’ capabilities, will solve.
Published in Chapter:
Data Integration: Introducing Semantics
Ismael Navas-Delgado (University of Málaga, Spain) and Jose F. Aldana-Montes (University of Málaga, Spain)
DOI: 10.4018/978-1-60566-242-8.ch050
The growth of the Internet has simplified data access, which has involved an increment in the creation of new data sources. Despite this increment, in most cases, these large data repositories are accessed manually. This problem is aggravated by the heterogeneous nature and extreme volatility of the information on the Web. This heterogeneity includes three types: intentional (differences in the contents), semantic (differences in the interpretation), and schematic (data types, labeling, structures, etc.). Thus, the increase of the available information and the complexity of dealing with this amount of information have involved a considerable amount of research into the subject of heterogeneous data integration. The database community, one of the most important groups dealing with data heterogeneity and dispersion, has provided a wide range of solutions to this problem. However, this issue has also been addressed and solutions have been offered by the information retrieval and knowledge representation communities, making this area a connection point between the three communities.
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More Results
Activity as a Mediator Between Users and Their Auditory Environment in an Urban Pocket Park: A Case Study of Parc du Portugal (Montreal, Canada)
A variable that explains the relationship between a dependent and an independent variable, outlining the basis for which one variable affects or influences the other. In this chapter, activity is proposed as a mediating variable/mediator of the relationship between public space users and their auditory environments.
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Spatial Data Integration Over the Web
A negotiator who acts as a link between parties, the neutral who carries out the dispute resolution process called mediation.
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Peaceful Solution of Conflicts in Schools
An impartial person outside the conflict interferes with the issue to support the conflict resolution and the communication between the parties involved.
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Mediation in Schools: How to Build a Peer Mediation Program
A person who acts as a third party in a mediation process, and uses a variety of communication and negotiation techniques, to help the parties involved in mediation find solutions to their dispute.
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Mediation and Ontology-Based Framework for Interoperability
A software component of a knowledge-based system that is used to isolate problem solvers from the logistical issues associated with accessing the database. Mediator is as an intermediate abstraction layer between databases and applications that use them.
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Philosophy of the Russian Criminal Subculture
Is a third neutral party that assists conflicting persons to reach a consensus.
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Telecentres as a Medium for Good Governance in Rural India
A person who helps people to use services of a telecentre. He interacts with ICT on behalf of a person who lacks IT skills.
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A Web-Geographical Information System to Support Territorial Data Integration
A software component providing a uniform integrated interface to process and execute queries over data stored in multiple, heterogeneous data sources.
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