Français Anglais
Accueil Annuaire Plan du site
Accueil > Evenements > Séminaires
Séminaire d'équipe(s) LaHDAK
Querying the deep web: from logic to optimisation, and back
Julien Leblay

13 May 2014, 13h00 - 13 May 2014, 14h30
Salle/Bat : 435/PCRI-N
Contact : julien.leblay@cs.ox.ac.uk

Activités de recherche : Algorithmes pour les grands volumes de données distribuées

Résumé :
The deep web commonly refers to documents and resources that are not directly accessible through web browsers, crawlers and other types of clients. Data residing behind web forms or web services belong to this class as one generally needs to provide input values to access them. Querying the deep web raises two difficult issues: (i) can a query be answered despite existing access restrictions, (ii) if so, how to find an efficient plan that automatically chooses the right inputs to produce the answer. Although a query may appear to be unanswerable, reasoning on the access restrictions and existing dependencies may uncover ways to answer it. Our approach tackles both problems concurrently by looking for proofs that a query is answerable and building a plan from each of these proofs. Plans are assigned costs to find an optimal one as well as to guide the proof search. I will present ongoing work on the topic, which has connections with data integration, view-based query answering and web service composition.

Pour en savoir plus :
Séminaires
Forum dev-LRI
Tuesday 26 November 2019 - 14h00
Salle : 445 - PCRI-N
Jonas et Erik .............................................

Optimal curing policy for epidemic spreading over
Réseaux
Friday 22 November 2019 - 14h30
Salle : 445 - PCRI-N
Francesco De Pellegrini .............................................

Langage d'icônes et visualisation d'ensembles : mé
Thursday 14 November 2019 - 14h30
Salle : 475 - PCRI-N
Jean-Baptiste Lamy .............................................

Algorithms for Cell Reprogramming Strategies in Bo
Thursday 07 November 2019 - 00h00
Salle : 475 - PCRI-N
Hugues Mandon .............................................

On the weakest failure detector for atomic multica
Algorithmique distribuée
Tuesday 05 November 2019 - 10h30
Salle : 465 - PCRI-N
Pierre Sutra .............................................