Schema transformation processors for federated objectbases

Tresch, Markus; Scholl, Marc H.

Schema transformation processors for federated objectbases

Dateien

Schema_Transformation_Processors_for_Federated_Objectbases_93_.pdfGröße: 273.76 KBDownloads: 213

Datum

1993

Autor:innen

Tresch, Markus

Scholl, Marc H.

URI (zitierfähiger Link)

http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-15509

Link zur Lizenz

Urheberrechtlich geschützt

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Informatik und Informationswissenschaft

Publikationstyp

Beitrag zu einem Konferenzband

Publikationsstatus

Published

Erschienen in

Proceedings, 3. Internat. Symp. on Database Systems for Advanced Applications (DASFAA), Daejon, April 1993. 1993

Zusammenfassung

In contrast to three schema levels in centralized objectbases, a reference architecture for federated objectbase systems proposes five levels of schemata. This paper investigates the fundamental mechanisms to be provided by an object model to realize the processors transforming between these levels. The first process is schema extension, which gives the possibility to define views. The second process is schema filtering, that allows to define subschemata. The third one, schema composition, brings together several (so far unrelated) objectbases. It is shown, how composition and extension are used for stepwise bottom-up integration of existing objectbases into a federation; and how extension and filtering support authorization on different levels in a federation. A powerful View definition mechanism and the possibility to define subschemas (i.e., parts of a schema) are the key mechanisms used in these processes.

Fachgebiet (DDC)

004 Informatik

Konferenz

DASFAA, Apr. 1993, Daejon

Zitieren

ISO 690

TRESCH, Markus, Marc H. SCHOLL, 1993. Schema transformation processors for federated objectbases. DASFAA. Daejon, Apr. 1993. In: Proceedings, 3. Internat. Symp. on Database Systems for Advanced Applications (DASFAA), Daejon, April 1993. 1993

BibTex

@inproceedings{Tresch1993Schem-6416,
  year={1993},
  title={Schema transformation processors for federated objectbases},
  booktitle={Proceedings, 3. Internat. Symp. on Database Systems for Advanced Applications (DASFAA), Daejon, April 1993},
  author={Tresch, Markus and Scholl, Marc H.}
}

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Universitätsbibliographie

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