157 citations · 165 across the 5 of their papers we have counts for
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cs.DB2020★ 2 cited
FedQPL: A Language for Logical Query Plans over Heterogeneous Federations of RDF Data Sources (Extended Version)
Sijin Cheng, Olaf Hartig
Federations of RDF data sources provide great potential when queried for answers and insights that cannot be obtained from one data source alone. A challenge for planning the execu…
cs.DB2016★ 2 cited
Walking without a Map: Optimizing Response Times of Traversal-Based Linked Data Queries (Extended Version)
Olaf Hartig, M. Tamer Özsu
The emergence of Linked Data on the WWW has spawned research interest in an online execution of declarative queries over this data. A particularly interesting approach is traversal…
cs.DB2015★ 2 cited
A Context-Based Semantics for SPARQL Property Paths over the Web (Extended Version)
Olaf Hartig, Giuseppe Pirro
As of today, there exists no standard language for querying Linked Data on the Web, where navigation across distributed data sources is a key feature. A natural candidate seems to…