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HiBISCuS: Hypergraph-Based Source Selection for SPARQL Endpoint Federation [chapter]

Muhammad Saleem, Axel-Cyrille Ngonga Ngomo
2014 Lecture Notes in Computer Science  
This work presents HiBISCuS, a novel hypergraph-based source selection approach to federated SPARQL querying.  ...  We extend three well-known SPARQL query federation engines with HiBISCus and compare our extensions with the original approaches on FedBench.  ...  for efficient source selection for SPARQL endpoint federation.  ... 
doi:10.1007/978-3-319-07443-6_13 fatcat:u3fsuuaqgfdnhnro554px2oonq

UPSP: Unique Predicate-based Source Selection for SPARQL Endpoint Federation

Ethem Cem Ozkan, Muhammad Saleem, Erdogan Dogdu, Axel-Cyrille Ngonga Ngomo
2016 Extended Semantic Web Conference  
In this work, we present UPSP, a new source selection approach for SPARQL query federation over multiple SPARQL endpoints.  ...  Efficient source selection is one of the most important optimization steps in federated SPARQL query processing as it leads to more efficient query execution plan generation.  ...  Introduction Federated SPARQL query engines mostly perform triple pattern-wise source selection (TPWSS) for SPARQL query federation over multiple SPARQL endpoints (data sources or only sources for short  ... 
dblp:conf/esws/OzkanSDN16 fatcat:k54x6ppfujca3osb4zcsqsgae4

BioFed: federated query processing over life sciences linked open data

Ali Hasnain, Qaiser Mehmood, Syeda Sana e Zainab, Muhammad Saleem, Claude Warren, Durre Zehra, Stefan Decker, Dietrich Rebholz-Schuhmann
2017 Journal of Biomedical Semantics  
provenance information for the source selection.  ...  Suggested solutions are based on query federation approaches, which require the submission of SPARQL queries to endpoints.  ...  Availability of supporting data BioFed is available through an online interface to run real time federated queries  ... 
doi:10.1186/s13326-017-0118-0 pmid:28298238 pmcid:PMC5353896 fatcat:ie4bsrw7dnh6hpxh7vy6672uha

TopFed: TCGA Tailored Federated Query Processing and Linking to LOD

Muhammad Saleem, Shanmukha S. Padmanabhuni, Axel-Cyrille Ngonga Ngomo, Aftab Iqbal, Jonas S. Almeida, Stefan Decker, Helena F. Deus
2014 Journal of Biomedical Semantics  
Results: We compare TopFed with a well established federation engine FedX in terms of source selection and query execution time by using 10 different federated SPARQL queries with varying requirements.  ...  Having the TCGA data distributed across multiple SPARQL endpoints, we enable biomedical scientists to query and retrieve information from these SPARQL endpoints by proposing a TCGA tailored federated SPARQL  ...  Further, we are thankful to Alex Parker from Foundation Medicine for providing valuable feedback on the results of biological SPARQL query show in Figure 1 .  ... 
doi:10.1186/2041-1480-5-47 pmid:25937882 pmcid:PMC4417511 fatcat:fqk7zz5mr5bwdpdyoz5nczafgy