Udo's Research Interests
Versioning and Configuration Concepts in Non-Standard-Database-Systems
The representation and adequate manipulation of complex objects and
complex object versions is a requirement inherent to many application
areas. In order to adequately support design applications we developed
OVDM (the Object and Version Data Model) providing means for the
representation and manipulation of explicit and apparent complex
object versions and configurations.
Processing Models for Technical DB-Applications
We provide a heterogenously structured DBMS consisting of a central
server (server DBMS) obeying to classical DB features and locally
adapted data management components on workstations (client DBMSs). A
hybrid processing model has been proposed allowing for manipulation of
application objects either through a local object buffer or directly
on the server.
Application Programming Interfaces (API)
We analyze existing APIs, extract embedding techniques, and propose an
embedding for a prototypical set-oriented query language into an
object-oriented programming language keeping the pros of an
earlier approach and also improving its programming interface.
Product Model Data Representation and Exchange: The STEP Standard
STEP (Industrial Automation Systems and Integration - Product Data
Representation and Exchange, see ISO 10303) allows for electronic
management of complete product life cycles. We investigate its data
definition language EXPRESS and its data access interface SDAI
in conjunction with database technology.
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