Data warehouses can be defined as 'subject-oriented', integrated, time-varying, non-volatile
collections of data that is used primarily in organizational decision making. Nowadays, data …

As a decision support information system, a data warehouse must provide high level quality
of data and services. In the DWQ project (Foundations of Data Warehouse Quality), we have …

Changing a database schema is a fact of life in information systems, as a response to
changes inside the enterprise (eg, new users' requirements, correction of errors in the …

Data warehouses are complex systems consisting of many components which store
highlyaggregated data for decision support. Due to the role of the data warehouses in the …

In this paper we define the Temporal and Versioning Model for Schema Evolution (TVSE), a
model that uses time and version concepts to manage dynamic schema evolution in object …

In this paper we present a formal model for the support of temporal schema versions in
object-oriented databases. Its definition is partially based on a generic (ODMG compatible) …

The problem of archiving and querying the history of a database is made more complex by
the fact that, along with the database content, the database schema also evolves with time …

6,078,745 A 6/2000 De Greefet a1. 6,117,180 A 9/2000 Dave et a1. 6,138,270 A 10/2000
Hsu tomized metadata documents from base metadata documents and customizations;(2) a …

New application areas for databases like data warehousing and OLAP (Online Analytical
Proc-essing) deploy the multidimensional data model in order to describe the application …

Abstract Models for conceptual design of data warehouse schemas have been proposed,
but few researchers have addressed schema evolution in a formal way and none have …