PFed: Recommending Plausible Federated Queries

Abstract : Federated SPARQL query processing allows to query multiple interlinked datasets hosted by remote SPARQL endpoints. However, finding pertinent federated queries over a growing number of datasets is challenging. In this paper, we propose PFed, an approach to recommend plausible federated queries based on query logs of different datasets. The problem is not to find similar federated queries, but plausible complementary queries over different datasets. Starting with a real SPARQL query log, PFed stretches the query with real queries from different logs. A generated federated query Q is plausible if an external observer cannot deny that queries in the original logs could be subqueries of Q. PFed relies on data summaries and real SPARQL query logs to generate plausible federated queries. It starts by pruning the queries logs by selecting only queries with joinable predicates. Experimental results with real logs of DBpedia and SWDF demonstrate that PFed is able to prune drastically the logs and recommend realistic federated queries.
Document type :
Reports
Complete list of metadatas

Cited literature [6 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02066904
Contributor : Hala Skaf-Molli <>
Submitted on : Wednesday, March 13, 2019 - 5:50:12 PM
Last modification on : Friday, June 21, 2019 - 10:27:05 AM
Long-term archiving on : Friday, June 14, 2019 - 4:16:46 PM

File

main.pdf
Files produced by the author(s)

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

  • HAL Id : hal-02066904, version 1

Collections

Citation

Sara El Hassad, Hala Skaf-Molli, Pascal Molli, Florian Hacques. PFed: Recommending Plausible Federated Queries. [Research Report] LS2N, Université de Nantes. 2019. ⟨hal-02066904⟩

Share

Metrics

Record views

152

Files downloads

43