A common characteristic of today's information systems is the
distribution of data among a number of autonomous and heterogeneous
repositories. Increasingly, these repositories are database management
systems (DBMS), but there is still a very large volume of data that is
stored in file systems, spreadsheets and others. A fundamental
challenge in building next generation information systems is to
provide interoperability among these autonomous and potentially
heterogeneous repositories.
Object Management Group (OMG)'s Object Management Architecture (OMA) is a step
in this direction. OMA defines a Reference Model identifying and
characterizing the components, interfaces, and protocols that compose
a distributed object architecture. The key communication mechanism of OMA is
CORBA where objects communicate with other objects via an ORB which provides
brokering services between the client and the server. COSS is a
complementary standard for integrating distributed objects.
In this talk, the design and implementation of a multidatabase system
based on OMA will be presented. The basic design decisions in registering
DBMSs to CORBA will be summarized. The global layer of the multidatabase
system, namely, the schema integrator, the global query processor and the
the global transaction manager will be discussed.
Referent:Prof. Dr. Asuman Dogac
Director of Software R&D Center
Department of Computer Engineering
Middle East Technical University , Ankara
Zeitpunkt: Freitag, 13 Dezember 1996, 14 Uhr c.t.
Ort: HS 3 der Universitaet Klagenfurt