Title:	A PROTOTYPE FOR QUERYING HETEROGENEOUS DATA SOURCES ON THE WEB
Author(s):	Alison Carlos Filgueiras, João Carlos da Silva, Auri Marcelo Rizzo Vincenzi
ISBN:	978-989-8533-16-6
Editors:	Bebo White and Pedro Isaías
Year:	2013
Edition:	Single
Keywords:	OAI-PMH; Interoperability; Digital Libraries; Relational Databases.
Type:	Full Paper
First Page:	19
Last Page:	26
Language:	English
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Paper Abstract:	Context: Keyword research is a widely used resource for retrieving information through search engines available on the Internet. However, most of the information available in the world fails to be obtained by conventional search processes due to its storage in databases, most of them relational. Studies that offer effective solutions when these data sources include relational databases have not been found in the literature. Objective: To present a solution for retrieving information stored in heterogeneous data sources using the OAI-PMH protocol as a mechanism that promotes interoperability. Method: Implementing a system that runs keyword queries in heterogeneous data sources through the collection of metadata exposed to OAI-PMH in data providers. Also, this study proposes a web service that uses public methods to allow relational database information to be returned without the need for additional efforts. Results: The simulations produced a return of information from metadata of digital objects and relational databases, obtained by data providers. Running query examples was successful in retrieving information in all data sources surveyed. Conclusion: This study proposes a solution for retrieving information stored in heterogeneous data sources. The proposed solution proved feasible by allowing keyword research in digital libraries and relational databases using OAI-PMH.
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