Jürgen Umbrich

According to our database, Jürgen Umbrich authored at least 64 papers between 2006 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2023

A Knowledge Graph Perspective on Knowledge Engineering.

Umutcan Simsek, Elias Kärle, Kevin Angele, Elwin Huaman, Juliette Opdenplatz, Dennis Sommer, Jürgen Umbrich, Dieter Fensel

SN Comput. Sci., 2023

2021

Knowledge Graph Lifecycle: Building and Maintaining Knowledge Graphs.

Umutcan Simsek, Kevin Angele, Elias Kärle, Juliette Opdenplatz, Dennis Sommer, Jürgen Umbrich, Dieter Fensel

Proceedings of the 2nd International Workshop on Knowledge Graph Construction co-located with 18th Extended Semantic Web Conference (ESWC 2021), 2021

2020

Towards a Knowledge Graph Lifecycle: A pipeline for the population of a commercial Knowledge Graph.

Umutcan Simsek, Jürgen Umbrich, Dieter Fensel

Proceedings of the Conference on Digital Curation Technologies (Qurator 2020), Berlin, Germany, January 20th, 2020

Knowledge Graphs - Methodology, Tools and Selected Use Cases

Dieter Fensel, Umutcan Simsek, Kevin Angele, Elwin Huaman, Elias Kärle, Oleksandra Panasiuk, Ioan Toma, Jürgen Umbrich, Alexander Wahler

Springer, ISBN: 978-3-030-37438-9, 2020

2019

Managing the evolution and preservation of the data web.

Jeremy Debattista, Javier D. Fernández, Maria-Esther Vidal, Jürgen Umbrich

J. Web Semant., 2019

Evaluating query and storage strategies for RDF archives.

Javier D. Fernández, Jürgen Umbrich, Axel Polleres, Magnus Knuth

Semantic Web, 2019

2018

Editorial: Special issue on quality management of Semantic Web assets (data, services and systems).

Amrapali Zaveri, Dimitris Kontokostas, Sebastian Hellmann, Jürgen Umbrich

Semantic Web, 2018

Comparison of metadata quality in open data portals using the Analytic Hierarchy Process.

Sylvain Kubler, Jérémy Robert, Sebastian Neumaier, Jürgen Umbrich, Yves Le Traon

Gov. Inf. Q., 2018

2017

SPARQLES: Monitoring public SPARQL endpoints.

Pierre-Yves Vandenbussche, Jürgen Umbrich, Luca Matteis, Aidan Hogan, Carlos Buil-Aranda

Semantic Web, 2017

Lifting Data Portals to the Web of Data.

Sebastian Neumaier, Jürgen Umbrich, Axel Polleres

Proceedings of the Workshop on Linked Data on the Web co-located with 26th International World Wide Web Conference (WWW 2017), 2017

Data Integration for Open Data on the Web.

Sebastian Neumaier, Axel Polleres, Simon Steyskal, Jürgen Umbrich

Proceedings of the Reasoning Web. Semantic Interoperability on the Web, 2017

Counting to k or how SPARQL1.1 Property Paths Can Be Extended to Top-k Path Queries.

Vadim Savenkov, Qaiser Mehmood, Jürgen Umbrich, Axel Polleres

Proceedings of the 13th International Conference on Semantic Systems, 2017

Open Data Hopes and Fears: Determining the Barriers of Open Data.

Martin Beno, Kathrin Figl, Jürgen Umbrich, Axel Polleres

Proceedings of the 2017 Conference for E-Democracy and Open Government, 2017

2016

Report on the 2nd Workshop on Managing the Evolution and Preservation of the Data Web (MEPDaW 2016).

Jeremy Debattista, Javier D. Fernández, Jürgen Umbrich

SIGIR Forum, 2016

Automated Quality Assessment of Metadata across Open Data Portals.

Sebastian Neumaier, Jürgen Umbrich, Axel Polleres

ACM J. Data Inf. Qual., 2016

Multi-level Semantic Labelling of Numerical Values.

Sebastian Neumaier, Jürgen Umbrich, Josiane Xavier Parreira, Axel Polleres

Proceedings of the Semantic Web - ISWC 2016, 2016

Measures for Assessing the Data Freshness in Open Data Portals.

Sebastian Neumaier, Jürgen Umbrich

Proceedings of the 2nd International Conference on Open and Big Data, 2016

Characteristics of Open Data CSV Files.

Johann Mitlöhner, Sebastian Neumaier, Jürgen Umbrich, Axel Polleres

Proceedings of the 2nd International Conference on Open and Big Data, 2016

Open Data Portal Quality Comparison using AHP.

Sylvain Kubler, Jérémy Robert, Yves Le Traon, Jürgen Umbrich, Sebastian Neumaier

Proceedings of the 17th International Digital Government Research Conference on Digital Government Research, 2016

2015

Link traversal querying for a diverse Web of Data.

Jürgen Umbrich, Aidan Hogan, Axel Polleres, Stefan Decker

Semantic Web, 2015

The DBpedia wayback machine.

Javier D. Fernández, Patrik Schneider, Jürgen Umbrich

Proceedings of the 11th International Conference on Semantic Systems, 2015

Quality Assessment and Evolution of Open Data Portals.

Jürgen Umbrich, Sebastian Neumaier, Axel Polleres

Proceedings of the 3rd International Conference on Future Internet of Things and Cloud, 2015

Towards capturing and preserving changes on the Web of Data.

Jürgen Umbrich, Nina Mrzelj, Axel Polleres

Proceedings of the First DIACHRON Workshop on Managing the Evolution and Preservation of the Data Web co-located with 12th European Semantic Web Conference (ESWC 2015), 2015

Towards Efficient Archiving of Dynamic Linked Open Data.

Javier D. Fernández, Axel Polleres, Jürgen Umbrich

Proceedings of the First DIACHRON Workshop on Managing the Evolution and Preservation of the Data Web co-located with 12th European Semantic Web Conference (ESWC 2015), 2015

2014

SPARQL: A Gateway to Open Data on the Web?

Pierre-Yves Vandenbussche, Aidan Hogan, Jürgen Umbrich, Carlos Buil-Aranda

ERCIM News, 2014

Resource Planning for SPARQL Query Execution on Data Sharing Platforms.

Stefan Hagedorn, Katja Hose, Kai-Uwe Sattler, Jürgen Umbrich

Proceedings of the 5th International Workshop on Consuming Linked Data (COLD 2014) co-located with the 13th International Semantic Web Conference (ISWC 2014), 2014

Strategies for Executing Federated Queries in SPARQL1.1.

Carlos Buil-Aranda, Axel Polleres, Jürgen Umbrich

Proceedings of the Semantic Web - ISWC 2014, 2014

Optimizing SPARQL Query Processing on Dynamic and Static Data Based on Query Time/Freshness Requirements Using Materialization.

Soheila Dehghanzadeh, Josiane Xavier Parreira, Marcel Karnstedt, Jürgen Umbrich, Manfred Hauswirth, Stefan Decker

Proceedings of the Semantic Technology - 4th Joint International Conference, 2014

Index-Based Source Selection and Optimization.

Jürgen Umbrich, Marcel Karnstedt, Axel Polleres, Kai-Uwe Sattler

Proceedings of the Linked Data Management., 2014

2013

Querying over Federated SPARQL Endpoints - A State of the Art Survey.

Nur Aini Rakhmawati, Jürgen Umbrich, Marcel Karnstedt, Ali Hasnain, Michael Hausenblas

CoRR, 2013

The ACE theorem for querying the web of data.

Jürgen Umbrich, Claudio Gutierrez, Aidan Hogan, Marcel Karnstedt, Josiane Xavier Parreira

Proceedings of the 22nd International World Wide Web Conference, 2013

Monitoring SPARQL Endpoint Status.

Pierre-Yves Vandenbussche, Carlos Buil-Aranda, Aidan Hogan, Jürgen Umbrich

Proceedings of the ISWC 2013 Posters & Demonstrations Track, 2013

SPARQL Web-Querying Infrastructure: Ready for Action?

Carlos Buil-Aranda, Aidan Hogan, Jürgen Umbrich, Pierre-Yves Vandenbussche

Proceedings of the Semantic Web - ISWC 2013, 2013

RDFS and OWL Reasoning for Linked Data.

Axel Polleres, Aidan Hogan, Renaud Delbru, Jürgen Umbrich

Proceedings of the Reasoning Web. Semantic Technologies for Intelligent Data Access - 9th International Summer School 2013, Mannheim, Germany, July 30, 2013

A Comparison of Federation over SPARQL Endpoints Frameworks.

Nur Aini Rakhmawati, Jürgen Umbrich, Marcel Karnstedt, Ali Hasnain, Michael Hausenblas

Proceedings of the Knowledge Engineering and the Semantic Web, 2013

Eight Fallacies when querying the Web of Data.

Jürgen Umbrich, Claudio Gutierrez, Aidan Hogan, Marcel Karnstedt, Josiane Xavier Parreira

Proceedings of the Workshops Proceedings of the 29th IEEE International Conference on Data Engineering, 2013

Exploring the Dynamics of Linked Data.

Tobias Käfer, Ahmed Abdelrahman, Jürgen Umbrich, Patrick O'Byrne, Aidan Hogan

Proceedings of the Semantic Web: ESWC 2013 Satellite Events, 2013

Observing Linked Data Dynamics.

Tobias Käfer, Ahmed Abdelrahman, Jürgen Umbrich, Patrick O'Byrne, Aidan Hogan

Proceedings of the Semantic Web: Semantics and Big Data, 10th International Conference, 2013

2012

Scalable and distributed methods for entity matching, consolidation and disambiguation over linked data corpora.

Aidan Hogan, Antoine Zimmermann, Jürgen Umbrich, Axel Polleres, Stefan Decker

J. Web Semant., 2012

An empirical survey of Linked Data conformance.

Aidan Hogan, Jürgen Umbrich, Andreas Harth, Richard Cyganiak, Axel Polleres, Stefan Decker

J. Web Semant., 2012

DyLDO: Towards a Dynamic Linked Data Observatory.

Tobias Käfer, Jürgen Umbrich, Aidan Hogan, Axel Polleres

Proceedings of the WWW2012 Workshop on Linked Data on the Web, 2012

Hybrid SPARQL Queries: Fresh vs. Fast Results.

Jürgen Umbrich, Marcel Karnstedt, Aidan Hogan, Josiane Xavier Parreira

Proceedings of the Semantic Web - ISWC 2012, 2012

Improving the Recall of Live Linked Data Querying through Reasoning.

Jürgen Umbrich, Aidan Hogan, Axel Polleres, Stefan Decker

Proceedings of the Web Reasoning and Rule Systems - 6th International Conference, 2012

Linked Data and Live Querying for Enabling Support Platforms for Web Dataspaces.

Jürgen Umbrich, Marcel Karnstedt, Josiane Xavier Parreira, Axel Polleres, Manfred Hauswirth

Proceedings of the Workshops Proceedings of the IEEE 28th International Conference on Data Engineering, 2012

Freshening up while Staying Fast: Towards Hybrid SPARQL Queries.

Jürgen Umbrich, Marcel Karnstedt, Aidan Hogan, Josiane Xavier Parreira

Proceedings of the Knowledge Engineering and Knowledge Management, 2012

Searching and Browsing Linked Data with SWSE.

Andreas Harth, Aidan Hogan, Jürgen Umbrich, Sheila Kinsella, Axel Polleres, Stefan Decker

Proceedings of the Semantic Search over the Web, 2012

2011

Comparing data summaries for processing live queries over Linked Data.

Jürgen Umbrich, Katja Hose, Marcel Karnstedt, Andreas Harth, Axel Polleres

World Wide Web, 2011

Searching and browsing Linked Data with SWSE: The Semantic Web Search Engine.

Aidan Hogan, Andreas Harth, Jürgen Umbrich, Sheila Kinsella, Axel Polleres, Stefan Decker

J. Web Semant., 2011

Improving the recall of decentralised linked data querying through implicit knowledge

Jürgen Umbrich, Aidan Hogan, Axel Polleres

CoRR, 2011

Enhancing Source Selection for Live Queries over Linked Data via Query Log Mining.

Yuan Tian, Jürgen Umbrich, Yong Yu

Proceedings of the Semantic Web - Joint International Semantic Technology Conference, 2011

2010

Towards Dataset Dynamics: Change Frequency of Linked Open Data Sources.

Jürgen Umbrich, Michael Hausenblas, Aidan Hogan, Axel Polleres, Stefan Decker

Proceedings of the WWW2010 Workshop on Linked Data on the Web, 2010

Data summaries for on-demand queries over linked data.

Andreas Harth, Katja Hose, Marcel Karnstedt, Axel Polleres, Kai-Uwe Sattler, Jürgen Umbrich

Proceedings of the 19th International Conference on World Wide Web, 2010

RaUL: RDFa User Interface Language - A Data Processing Model for Web Applications.

Armin Haller, Jürgen Umbrich, Michael Hausenblas

Proceedings of the Web Information Systems Engineering - WISE 2010, 2010

Dataset Dynamics Compendium: A Comparative Study.

Jürgen Umbrich, Boris Villazón-Terrazas, Michael Hausenblas

Proceedings of the First International Workshop on Consuming Linked Data (COLD 2010), 2010

LDspider: An Open-source Crawling Framework for the Web of Linked Data.

Robert Isele, Jürgen Umbrich, Christian Bizer, Andreas Harth

Proceedings of the ISWC 2010 Posters & Demonstrations Track: Collected Abstracts, 2010

Towards Understanding the Changing Web: Mining the Dynamics of Linked-Data Sources and Entities.

Jürgen Umbrich, Marcel Karnstedt, Sebastian Land

Proceedings of the LWA 2010, 2010

2009

DING! Dataset Ranking using Formal Descriptions.

Nickolai Toupikov, Jürgen Umbrich, Renaud Delbru, Michael Hausenblas, Giovanni Tummarello

Proceedings of the WWW2009 Workshop on Linked Data on the Web, 2009

Fast and Scalable Pattern Mining for Media-Type Focused Crawling.

Jürgen Umbrich, Marcel Karnstedt, Andreas Harth

Proceedings of the LWA 2009: Workshop-Woche: Lernen, 2009

2008

Four Heuristics to Guide Structured Content Crawling.

Jürgen Umbrich, Andreas Harth, Aidan Hogan, Stefan Decker

Proceedings of the Eighth International Conference on Web Engineering, 2008

Exploring the Knowledge in Semi Structured Data Sets with Rich Queries.

Jürgen Umbrich, Sebastian Blohm

Proceedings of the Workshop on Semantic Search (SemSearch 2008) at the 5th European Semantic Web Conference (ESWC 2008), 2008

2007

Towards a scalable search and query engine for the web.

Aidan Hogan, Andreas Harth, Jürgen Umbrich, Stefan Decker

Proceedings of the 16th International Conference on World Wide Web, 2007

YARS2: A Federated Repository for Querying Graph Structured Data from the Web.

Andreas Harth, Jürgen Umbrich, Aidan Hogan, Stefan Decker

Proceedings of the Semantic Web, 2007

SWSE: Answers Before Links!

Andreas Harth, Aidan Hogan, Renaud Delbru, Jürgen Umbrich, Seán O'Riain, Stefan Decker

Proceedings of the Semantic Web Challenge 2007 co-located with ISWC 2007 + ASWC 2007, 2007

2006

MultiCrawler: A Pipelined Architecture for Crawling and Indexing Semantic Web Data.

Andreas Harth, Jürgen Umbrich, Stefan Decker

Proceedings of the Semantic Web - ISWC 2006, 5th International Semantic Web Conference, 2006