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Design and Implementation of a CORBA Query Service Accessing EXPRESS-based Data
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Jürgen Sellentin and
Bernhard Mitschang
View Paper (PDF)
Return to Session 5B: Object Databases
In this paper we describe the design and implementation
of a CORBA Query Service targeted to access data that is defined by the EXPRESS
data modeling language. EXPRESS is used primarily in engineering domains (like
CAD/CAM and GIS) to describe mostly product model data (like parts explosion or
product geometry).
In order to bring query facilities for EXPRESS-based data
to CORBA a number of design decisions have to be taken, although the CORBA
Query Service is standardized by the OMG. Among the most important and
performance- indicating decisions are the definition of an appropriate query
language and the description of the query result data structures. In this paper
we discuss solutions to these topics and report on the experiences gained in
designing and implementing our first CORBA Query Service for EXPRESS-based Data.
Copyright(C) 2000 ACM
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