informatik.uni-ulm.de

Meta Object Management and its Application to Database Evolution

Authors: 
Tresch, M; Scholl, MH
Year: 
1992
Venue: 
Proc. 11th ER

In this paper, we address the problem of supporting more
flexibility on the schema of object-oriented databases. We describe a
general framework based on an object-oriented data model, where three
levels of objects are distinguished
data objects, schema objects,and meta-schema objects. We discuss the prerequisites for applying the query and
update operations of an object algebra uniformly on all three levels. As
a sample application of the framework, we focus on database evolution, that is, realizing incremental changes to the database schema and their

Schemaevolution in Workflow-Management-Systemen

Authors: 
Rinderle, S.; Dadam, Peter
Year: 
2003
Venue: 
(\"Aktuelles Schlagwort\"). Informatik-Spektrum, Band 26, Heft 1, Februar 2003, S. 17-19

Ein Schema (Muster,Entwurf) dient der modellhaften Beschreibung realer Sachverhalte. Mit Hilfe solcher Modelle kann der Mensch in seiner tglichen Arbeit untersttzt werden. So gibt es z. B. Datenbankschemata zur Beschreibung von Daten und deren Beziehung untereinander und Workflow- Schemata zur Modellierung von Arbeitsprozessen (engl.workflow).

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