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Schema Evolution in Heterogeneous Database Architectures, A Schema Transformation Approach

... integration and schema evolution into one framework. In previous work we have developed a general framework to support schema transformation and integration in heterogeneous database architectures. Here we show how this framework also ...

Publication - cat - 09/13/2022 - 17:45 - 0 comments - 0 attachments

On Schema Evolution in Multidimensional Databases

... on a logical level (e.g. OLAP systems) are often used in data warehouse environments. The user requirements in these dynamic application areas are subject to frequent changes. This ...

Publication - cat - 04/17/2013 - 12:49 - 0 comments - 1 attachment

Evolution Support in Large-Scale Interoperable Systems: a Metadata Driven Approach

... cost and effort required for maintaining the federation in a consistent state after its launch. If only human intervention is to be ... of change at both local and federal conceptual levels in interoperating database systems. The basis for the model is the exploitation ...

Publication - cat - 04/17/2013 - 10:05 - 0 comments - 0 attachments

Schema evolution in data warehouses

... 50 - 99 In this paper, we address the issues related to the evolution and maintenance ... sources. The data of the data warehouse is used primarily in organizational decision-making and may be strategic. Therefore, the schema ...

Publication - erhard - 04/17/2013 - 09:05 - 0 comments - 0 attachments

Managing Schema Change in an Heterogeneous Environment

... (or view). However, existing support is lacking in two ways. First, change primitives as presented in literature are very limiting in terms of their capabilities allowing users ...

Publication - cat - 04/17/2013 - 06:38 - 0 comments - 0 attachments

Semantic heterogeneity as a result of domain evolution

... We describe examples of problems of semantic heterogeneity in databases due to “domain evolution”, as it occurs in both single- and multidatabase systems. These problems occur when the ...

Publication - cat - 04/17/2013 - 06:27 - 0 comments - 1 attachment

Managing source schema evolution in web warehouses

... of integrated Web data. One of the main challenges in these systems is to deal with the volatile and dynamic nature of Web sources. In this work we address the effects of adding/removing/changing Web sources and ...

Publication - cat - 04/17/2013 - 05:27 - 0 comments - 0 attachments

Towards quality-oriented data warehouse usage and evolution

... provide high level quality of data and quality of service. In the DWQ project we have proposed an architectural framework and a repository ... metadata which describes all the data warehouse components in a set of metamodels to which is added a quality metamodel, defining for each ...

Publication - cat - 04/17/2013 - 05:27 - 0 comments - 1 attachment

FIESTA: A Framework for Schema Evolution in Multidimensional Databases

... http://tumb1.biblio.tu-muenchen.de/publ/diss/in/2000/blaschka.pdf Citations:  ... Processing)deploy the multidimensional data model in order to describe the application domain. Consequently, OLAP systems are ...

Publication - cat - 04/16/2013 - 18:16 - 0 comments - 1 attachment

A Randomized Approach for the Incremental Design of an Evolving Data Warehouse

... views that determine its schema and its content in terms of the schema and the content of the data sources. DW applications ... against the cost of maintaining the materialized views. In an evolving DW application, new queries need to be answered by the DW. An ...

Publication - cat - 04/16/2013 - 04:49 - 0 comments - 1 attachment

The EVE approach: view synchronization in dynamic distributed environments

... construction and maintenance of data warehouses (views) in large-scale environments composed of numerous distributed and evolving ... the problem of schema changes of ISs, while previous work in this area, such as incremental view maintenance, has mainly dealt with data ...

Publication - cat - 04/16/2013 - 02:27 - 0 comments - 0 attachments

Version Propagation in Federated Database Systems

... integrity of and dependencies between product data created in many different engineering applications. Most of these applications support ... of drawings and documents. Consequently, federations in engineering environments have to provide version management on their global ...

Publication - cat - 04/16/2013 - 01:27 - 0 comments - 0 attachments

Schema evolution in data warehousing environments: a schema transformation-based approach

... 785.12 KB In heterogeneous data warehousing environments, autonomous data sources are ... data sources and the integrated database may be expressed in different modelling languages. It is possible for either the data source ... of the schema, or evolution of the modelling language in which the schema is expressed, or both. In such scenarios, it is important ...

Publication - cat - 04/15/2013 - 22:49 - 0 comments - 1 attachment