Mediators Metadata Management Services : An Implementation Using GOA++ System

Electronic Journal of SADIO

http://www.dc.uba.ar/sadio/ejs

vol. 2, no. 1, pp. 30-49 (1999)

Mediators Metadata Management Services : An Implementation Using GOA++ System

Thaís Saldunbides Brügger¹

Paulo de Figueiredo Pires¹

Marta Mattoso ¹

¹Computer Science Department, COPPE/UFRJ - Federal University of Rio de Janeiro, P.O. Box 68511, Rio de Janeiro, RJ, Brasil, 21945-970, Fax: +55 21 2906626
e-mail: thais, pires, marta @cos.ufrj.br

Abstract

The main contribution of this work is the development of a Metadata Manager to interconnect heterogeneous and autonomous information sources in a flexible, expandable and transparent way. The interoperability at the semantic level is reached using an integration layer, structured in a hierarchical way, based on the concept of Mediators. Services of a Mediator Metadata Manager (MMM) are specified and implemented using functions based on the Outlines of GOA++. The MMM services e are available in the form of a GOA++ API and they can be accessed remotely via CORBA or through local API calls.