Research on data integration has provided a set of rich and well understood schema mediation languages and systems that provide a meta-data representation of the modeled real world, while, in general, they do not deal with data instances.Such meta-data are necessary for querying classes result of an integration process: the end user typically does not know the contents of such classes, he simply defines his queries on the basis of the names of classes and attributes.In this paper we introduce an approach enriching the description of selected attributes specifying as meta-data a list of the “relevant values” for such attributes. Furthermore relevant values may be hierarchically collected in a taxonomy. In this way, the user may exploit new meta-data in the interactive process of creating/refining a query. The same meta-data are also exploited by the system in the query rewriting/unfolding process in orderto filter the results showed to the user.We conducted an evaluation of the strategy in an e-business context within the EU-IST SEWASIE project. The evaluation proved the practicability of the approach for large value instances.

Instances navigation for querying integrated data from web-sites / Beneventano, Domenico; Bergamaschi, Sonia; Bruschi, Stefania; Guerra, Francesco; Orsini, Mirko; Vincini, Maurizio. - STAMPA. - (2006), pp. 46-53. ((Intervento presentato al convegno International Conference on Web Information Systems tenutosi a Setubal, Portugal, nel April 11-13, 2006.

Instances navigation for querying integrated data from web-sites

BENEVENTANO, Domenico;BERGAMASCHI, Sonia;BRUSCHI, Stefania;GUERRA, Francesco;ORSINI, Mirko;VINCINI, Maurizio
2006

Abstract

Research on data integration has provided a set of rich and well understood schema mediation languages and systems that provide a meta-data representation of the modeled real world, while, in general, they do not deal with data instances.Such meta-data are necessary for querying classes result of an integration process: the end user typically does not know the contents of such classes, he simply defines his queries on the basis of the names of classes and attributes.In this paper we introduce an approach enriching the description of selected attributes specifying as meta-data a list of the “relevant values” for such attributes. Furthermore relevant values may be hierarchically collected in a taxonomy. In this way, the user may exploit new meta-data in the interactive process of creating/refining a query. The same meta-data are also exploited by the system in the query rewriting/unfolding process in orderto filter the results showed to the user.We conducted an evaluation of the strategy in an e-business context within the EU-IST SEWASIE project. The evaluation proved the practicability of the approach for large value instances.
International Conference on Web Information Systems
Setubal, Portugal,
April 11-13, 2006
46
53
Beneventano, Domenico; Bergamaschi, Sonia; Bruschi, Stefania; Guerra, Francesco; Orsini, Mirko; Vincini, Maurizio
Instances navigation for querying integrated data from web-sites / Beneventano, Domenico; Bergamaschi, Sonia; Bruschi, Stefania; Guerra, Francesco; Orsini, Mirko; Vincini, Maurizio. - STAMPA. - (2006), pp. 46-53. ((Intervento presentato al convegno International Conference on Web Information Systems tenutosi a Setubal, Portugal, nel April 11-13, 2006.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/587273
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 1
social impact