O. Hartig

Most-cited papers

Executing SPARQL Queries over the Web of Linked Data
O. Hartig, Christian Bizer, J. Freytag
2009International Workshop on the Semantic Web438 citations Open access
Semantic Scholar
Diversified Stress Testing of RDF Data Management Systems
Günes Aluç, O. Hartig, M. Tamer Özsu, K. Daudjee
2014International Workshop on the Semantic Web314 citations Open access
Semantic Scholar
Triple Pattern Fragments: A low-cost knowledge graph interface for the Web
R. Verborgh, Miel Vander Sande, O. Hartig, Joachim Van Herwegen +4 more
2016Journal of Web Semantics304 citations Open access
Semantic Scholar
Provenance Information in the Web of Data
O. Hartig
2009LDOW223 citations
Semantic Scholar
Querying Datasets on the Web with High Availability
R. Verborgh, O. Hartig, Ben De Meester, Gerald Haesendonck +6 more
2014International Workshop on the Semantic Web162 citations Open access
Semantic Scholar
Using Web Data Provenance for Quality Assessment
O. Hartig, Jun Zhao
2009Semantic Web in Provenance Management161 citations
Semantic Scholar
Publishing and Consuming Provenance Metadata on the Web of Linked Data
O. Hartig, Jun Zhao
2010International Provenance and Annotation Workshop155 citations
Semantic Scholar
The future is big graphs
Sherif Sakr, A. Bonifati, H. Voigt, A. Iosup +37 more
2020Communications of the ACM120 citations Open access
Semantic Scholar
Semantics and Complexity of GraphQL
O. Hartig, Jorge Pérez
2018The Web Conference119 citations Open access
Semantic Scholar
Foundations of RDF⋆ and SPARQL⋆ (An Alternative Approach to Statement-Level Metadata in RDF)
O. Hartig
2017Alberto Mendelzon Workshop on Foundations of Data Management107 citations
Semantic Scholar
Querying Trust in RDF Data with tSPARQL
O. Hartig
2009Extended Semantic Web Conference103 citations Open access
Semantic Scholar
Zero-Knowledge Query Planning for an Iterator Implementation of Link Traversal Based Query Execution
O. Hartig
2011Extended Semantic Web Conference92 citations Open access
Semantic Scholar
Reconciliation of RDF* and Property Graphs
O. Hartig
2014arXiv.org89 citations
Semantic Scholar
Foundations of an Alternative Approach to Reification in RDF
O. Hartig, B. Thompson
2014arXiv.org85 citations
Semantic Scholar
A Database Perspective on Consuming Linked Data on the Web
O. Hartig, Andreas Langegger
2010Datenbank-Spektrum78 citations
Semantic Scholar
An Overview on Execution Strategies for Linked Data Queries
O. Hartig
2013Datenbank-Spektrum71 citations
Semantic Scholar
SPARQL for a Web of Linked Data: Semantics and Computability (Extended Version)
O. Hartig
2012Extended Semantic Web Conference70 citations Open access
Semantic Scholar
Foundations of traversal based query execution over linked data
O. Hartig, J. Freytag
2011ACM Conference on Hypertext & Social Media66 citations
Semantic Scholar
Provenance XG Final Report
Y. Gil, James Cheney, Paul Groth, O. Hartig +3 more
201058 citations
Semantic Scholar
CostFed: Cost-Based Query Optimization for SPARQL Endpoint Federation
Muhammad Saleem, Alexander Potocki, Tommaso Soru, O. Hartig +1 more
2018International Conference on Semantic Systems47 citations Open access
Semantic Scholar
Bindings-Restricted Triple Pattern Fragments
O. Hartig, C. Buil-Aranda
2016OTM Conferences47 citations Open access
Semantic Scholar
SQUIN: a traversal based query execution system for the web of linked data
O. Hartig
2013ACM SIGMOD Conference45 citations
Semantic Scholar
LDQL: A Query Language for the Web of Linked Data
O. Hartig, Jorge Pérez
2015International Workshop on the Semantic Web42 citations Open access
Semantic Scholar
Linked Data Management
O. Hartig, Katja Hose, Juan Sequeda
2014Encyclopedia of Big Data Technologies42 citations
Semantic Scholar
An Initial Analysis of Facebook's GraphQL Language
O. Hartig, Jorge Pérez
2017Alberto Mendelzon Workshop on Foundations of Data Management34 citations
Semantic Scholar
PROV-AQ: Provenance Access and Query
G. Klyne, Paul T. Groth, L. Moreau, O. Hartig +6 more
201330 citations
Semantic Scholar
Towards Interoperable Provenance Publication on the Linked Data Web
Jun Zhao, O. Hartig
2012LDOW27 citations
Semantic Scholar
A Formal Framework for Comparing Linked Data Fragments
O. Hartig, I. Letter, Jorge Pérez
2017International Workshop on the Semantic Web26 citations Open access
Semantic Scholar
How Caching Improves Efficiency and Result Completeness for Querying Linked Data
O. Hartig
2011LDOW25 citations
Semantic Scholar
RDF* and SPARQL*: An Alternative Approach to Annotate Statements in RDF
O. Hartig
2017International Workshop on the Semantic Web24 citations
Semantic Scholar
A Context-Based Semantics for SPARQL Property Paths over the Web (Extended Version)
O. Hartig, G. Pirrò
2015Extended Semantic Web Conference24 citations Open access
Semantic Scholar
Walking Without a Map: Ranking-Based Traversal for Querying Linked Data
O. Hartig, M. Tamer Özsu
2016International Workshop on the Semantic Web23 citations Open access
Semantic Scholar
Defining Schemas for Property Graphs by using the GraphQL Schema Definition Language
O. Hartig, J. Hidders
2019GRADES/NDA@SIGMOD/PODS22 citations Open access
Semantic Scholar
chameleon-db: a Workload-Aware Robust RDF Data Management System
Günes Aluç, M. Tamer Özsu, K. Daudjee, O. Hartig
201322 citations
Semantic Scholar
The Semantic Web: ESWC 2017 Satellite Events
E. Blomqvist, Katja Hose, Heiko Paulheim, Agnieszka Ławrynowicz +2 more
2017Lecture Notes in Computer Science20 citations Open access
Semantic Scholar
Federated RDF Query Processing
Maribel Acosta, O. Hartig, Juan Sequeda
2019Encyclopedia of Big Data Technologies19 citations
Semantic Scholar
FedQPL: A Language for Logical Query Plans over Heterogeneous Federations of RDF Data Sources
Si-Jin Cheng, O. Hartig
2020International Conference on Information Integration and Web-based Applications & Services18 citations Open access
Semantic Scholar
The OneGraph vision: Challenges of breaking the graph model lock-in
Ora Lassila, M. Schmidt, O. Hartig, B. Bebee +7 more
2022Semantic Web17 citations Open access
Semantic Scholar
Foundations to Query Labeled Property Graphs using SPARQL
O. Hartig
2019SEM4TRA-AMAR@SEMANTiCS14 citations
Semantic Scholar
SPARQL with property paths on the Web
O. Hartig, G. Pirrò
2017Semantic Web14 citations Open access
Semantic Scholar
Linked Data query processing
O. Hartig, M. Tamer Özsu
2014IEEE International Conference on Data Engineering14 citations
Semantic Scholar
Converting property graphs to RDF: a preliminary study of the practical impact of different mappings
Shahrzad Khayatbashi, Sebastián Ferrada, O. Hartig
2022GRADES-NDA@SIGMOD13 citations Open access
Semantic Scholar
Low-Cost Queryable Linked Data through Triple Pattern Fragments
R. Verborgh, O. Hartig, Ben De Meester, Gerald Haesendonck +6 more
2014International Workshop on the Semantic Web13 citations
Semantic Scholar
A Main Memory Index Structure to Query Linked Data
O. Hartig, Frank Huber
2011LDOW13 citations
Semantic Scholar
Linked Data for Building a Map of Researchers
O. Hartig, H. Mühleisen, J. Freytag
2009SFSW@ESWC12 citations
Semantic Scholar
Scheduling Refresh Queries for Keeping Results from a SPARQL Endpoint Up-to-Date (Short Paper)
Magnus Knuth, O. Hartig, Harald Sack
2016OTM Conferences11 citations Open access
Semantic Scholar
Walking without a Map: Optimizing Response Times of Traversal-Based Linked Data Queries (Extended Version)
O. Hartig, M. Tamer Özsu
2016arXiv.org11 citations
Semantic Scholar
Executing queries over schemaless RDF databases
Gunes Aluc, M. Tamer Ozsu, K. Daudjee, O. Hartig
2015IEEE International Conference on Data Engineering11 citations
Semantic Scholar
How to consume linked data on the web: tutorial description
O. Hartig, Juan Sequeda, Jamie Taylor, P. Sinclair
2010The Web Conference11 citations
Semantic Scholar
An Empirical Analysis of GraphQL API Schemas in Open Code Repositories and Package Registries
Yunmyung Kim, M. Consens, O. Hartig
2019Alberto Mendelzon Workshop on Foundations of Data Management10 citations
Semantic Scholar