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Dr. rer. nat. Muhammad Saleem

Senior Researchers

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Publications

Fact Checking Knowledge Graphs - A Survey

By Umair Qudus, Michael Röder, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

ACM Comput. Surv., 2025, #article

Multilingual Relation Extraction: A Survey

By Manzoor Ali, René Speck, Hamada M. Zahera, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

IEEE Access, 2025, #article

Enhancing Relation Extraction Through Augmented Data: Large Language Models Unleashed

By Manzoor Ali, Muhammad Sohail Nisar, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

NLDB24, 2024, #inproceedings

Unsupervised Relation Extraction with Sentence level Distributional Semantics

By Manzoor Ali, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

ICSC, 2023, #inproceedings

RELD: A Knowledge Graph of Relation Extraction Datasets

By Manzoor Ali, Muhammad Saleem, Diego Moussallem, Mohamed Ahmed Sherif, Axel-Cyrille Ngonga Ngomo

ESWC, 2023, #inproceedings

CovidPubGraph: A FAIR Knowledge Graph of COVID-19 Publications

By Svetlana Pestryakova, Daniel Vollmers, Mohamed Ahmed Sherif, Stefan Heindorf, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Scientific Data, 2022, #article

HybridFC: A Hybrid Fact-Checking Approach for Knowledge Graphs

By Umair Qudus, Michael Röder, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

The Semantic Web -- ISWC 2022, 2022, #inproceedings

Hashing the Hypertrie: Space- and Time-Efficient Indexing for SPARQL in Tensors

By Alexander Bigerl, Lixi Conrads, Charlotte Behning, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

The Semantic Web -- ISWC 2022, 2022, #inproceedings

REBench: Microbenchmarking Framework for Relation Extraction Systems

By Manzoor Ali, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

ISWC, 2022, #inproceedings

An empirical evaluation of cost-based federated SPARQL query processing engines

By Umair Qudus, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, Young-koo Lee

Semantic Web, 2021, #article

Unsupervised relation extraction using sentence encoding

By Manzoor Ali, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

ESWC2021 Poster and Demo Track, 2021, #inproceedings

When is the Peak Performance Reached? An Analysis of RDF Triple Stores

By Hashim Khan, Manzoor Ali, Axel-Cyrille Ngonga Ngomo, Muhammad Saleem

SEMANTiCS 2021, 2021, #inproceedings

Efficient RDF Knowledge Graph Partitioning Using Querying Workload

By Adnan Akhter, Muhammad Saleem, Alexander Bigerl, Axel-Cyrille Ngonga Ngomo

Proceedings of the 11th on Knowledge Capture Conference, 2021, #inproceedings

Storage, indexing, query processing, and benchmarking in centralized and distributed rdf engines: A survey

By Waqas Ali, Muhammad Saleem, Bin Yao, Aidan Hogan, Axel-Cyrille Ngonga Ngomo

arXiv preprint arXiv:2009.10331, 2020, #article

Where is Linked Data in Question Answering over Linked Data?

By Tommaso Soru, Edgard Marx, André Valdestilhas, Diego Moussallem, Gustavo Publio, Muhammad Saleem

arXiv preprint arXiv:2005.03640, 2020, #article

Revealing Secrets in SPARQL Session Level

By Xinyue Zhang, Meng Wang, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, Guilin Qi, Haofen Wang

International Semantic Web Conference, 2020, #inproceedings

Tentris -- A Tensor-Based Triple Store

By Alexander Bigerl, Lixi Conrads, Charlotte Behning, Mohamed Ahmed Sherif, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

The Semantic Web -- ISWC 2020, 2020, #inproceedings

Benchmarking knowledge graphs on the web

By Michael Röder, Mohamed Ahmed Sherif, Muhammad Saleem, Felix Conrads, Axel-Cyrille Ngonga Ngomo

arXiv preprint arXiv:2002.06039, 2020, #article

Benchmarking the Lifecycle of Knowledge Graphs

By Michael Röder, Mohamed Ahmed Sherif, Muhammad Saleem, Felix Conrads, Axel-Cyrille Ngonga Ngomo

Knowledge Graphs for eXplainable Artificial Intelligence: Foundations, Applications and Challenges, 2020, #inbook

How Representative is a SPARQL Benchmark? An Analysis of RDF Triplestore Benchmarks

By Muhammad Saleem, Gábor Szárnyas, Felix Conrads, Syed Ahmad Chan Bukhari, Qaiser Mehmood, Axel-Cyrille Ngonga Ngomo

TheWebConf19 (WWW2019), 2019, #inproceedings

QPPDs: Querying Property Paths over Distributed RDF Datasets

By Qaiser Mehmood, Muhammad Saleem, Ratnesh Sahay, Axel-Cyrille Ngonga Ngomo, Mathieu D'Aquin

IEEE ACCESS, 2019, #inproceedings

Microbenchmarks for Question AnsweringSystems Using QaldGen

By Qaiser Mehmood, Abhishek Nadgeri, Muhammad Saleem, Kuldeep Singh, Axel-Cyrille Ngonga Ngomo, Jens Lehmann

Demo at ISWC, 2019, #inproceedings

Qaldgen: Towards microbenchmarking of question answering systems over knowledge graphs

By Kuldeep Singh, Muhammad Saleem, Abhishek Nadgeri, Felix Conrads, Jeff Z Pan, Axel-Cyrille Ngonga Ngomo, Jens Lehmann

International Semantic Web Conference, 2019, #inproceedings

A Comprehensive Review of Type-2 Fuzzy Ontology

By Iqbal Qasim, Mahmood Alam, Shumaila Khan, Abdul Wahid Khan, Khalid Malik, Muhammad Saleem, Syed Ahmad Chan Bukhari

Artificial Intelligence Review, 2019, #inproceedings

More Complete Resultset Retrieval from Large Heterogeneous RDF Sources

By Andre Valdestilhas, Tommaso Soru, Muhammad Saleem

Knowledge Capture K-Cap, 2019, #inproceedings

Assessing, Monitoring and Analyzing Linked Data Quality in Public SPARQL Endpoints

By Muhammad Intizar Ali, Qaiser Mehmood, Muhammad Saleem

QuWeDa workshop at ISWC, 2019, #inproceedings

Generating SPARQL Query Containment Benchmarks using the SQCFramework

By Muhammad Saleem, Qaiser Mehmood, Claus Stadler, Jens Lehmann, Axel-Cyrille Ngonga Ngomo

ISWC 2018 Poster and Demos, 2018, #inproceedings

Where is my URI?

By Andre Valdestilhas, Tommaso Soru, Markus Nentwig, Edgard Marx, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

European Semantic Web Conference, 2018, #inproceedings

An Empirical Evaluation of RDF Graph Partitioning Techniques

By Adnan Akhter, Axel-Cyrille Ngonga Ngomo, Muhammad Saleem

21st International Conference on Knowledge Engineering and Knowledge Management, 2018, #inproceedings

9th Challenge on Question Answering over Linked Data (QALD-9) (invited paper)

By Ricardo Usbeck, Ria Hari Gusmita, Axel-Cyrille Ngonga Ngomo, Muhammad Saleem

Joint proceedings of the 4th Workshop on Semantic Deep Learning (SemDeep-4) and NLIWoD4: Natural Language Interfaces for the Web of Data (NLIWOD-4) and 9th Question Answering over Linked Data challenge (QALD-9) co-located with 17th International Semantic Web Conference (ISWC 2018), Monterey, California, United States of America, October 8th - 9th, 2018., 2018, #inproceedings

Extending LargeRDFBench for Multi-Source Data at Scale for SPARQL Endpoint Federation

By Ali Hasnainb, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, Dietrich Rebholz-Schuhmann

ISWC Satellite, SSWS, 2018, #inproceedings

Efficiently Pinpointing SPARQL Query Containments

By Claus Stadler, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, Jens Lehmann

18th International Conference on Web Engineering (ICWE2018), 2018, #inproceedings

CostFed: Cost-Based Query Optimization for SPARQL Endpoint Federation

By Muhammad Saleem, Alexander Potocki, Tommaso Soru, Olaf Hartig, Axel-Cyrille Ngonga Ngomo

Semantics, 2018, #inproceedings

SQCFramework: Generating SPARQL Query Containment Benchmarks using the SQCFramework

By Muhammad Saleem, Claus Stadler, Qaiser Mehmood, Jens Lehmann, Axel-Cyrille Ngonga Ngomo

Demo at ISWC, 2018, #inproceedings

A Decentralized Architecture for SPARQL Query Processing and RDF Sharing: A Position Paper

By Edgard Marx, Muhammad Saleem, Ioanna Lytra, Axel-Cyrille Ngonga Ngomo

Semantic Computing (ICSC), 2018 IEEE 12th International Conference on, 2018, #inproceedings

An Evaluation of SPARQL Federation Engines Over Multiple Endpoints

By Muhammad Saleem, Yasar Khan, Ali Hasnain, Ivan Ermilov, Axel-Cyrille Ngonga Ngomo

Technical report, 2017, #article

SAFE: SPARQL Federation over RDF Data Cubes with Access Control

By Yasar Khan, Muhammad Saleem, Muntazir Mehdi, Aidan Hogan, Qaiser Mehmood, Dietrich Rebholz-Schuhmann, Ratnesh Sahay

Journal of Biomedical Semantics (JBMS), 2017, #inproceedings

Distributed Semantic Analytics using the SANSA Stack

By Jens Lehmann, Gezim Sejdiu, Lorenz Bühmann, Patrick Westphal, Claus Stadler, Ivan Ermilov, Simon Bin, Nilesh Chakraborty, Muhammad Saleem, Axel-Cyrille Ngomo Ngonga, Hajira Jabeen

Proceedings of 16th International Semantic Web Conference - Resources Track (ISWC'2017), 2017, #inproceedings

BioFed: federated query processing over life sciences linked open data

By Ali Hasnain1, Qaiser Mehmood1, Syeda Sana e Zainab, Muhammad Saleem, Claude Warren Jr, Durre Zehra, Stefan Decker, and Dietrich Rebholz-Schuhmann

Journal of Biomedical Semantics (JBMS), 2017, #inproceedings

Question Answering Over Linked Data: What is Difficult to Answer? What affects the F scores?

By Muhammad Saleem, Samaneh Nazari Dastjerdi, Ricardo Usbeck, Axel-Cyrille Ngonga Ngomo

Natural Language Interfaces workshop at ISWC, 2017, #inproceedings

Federated SPARQL Query Processing Via CostFed

By Alexander Potocki, Muhammad Saleem, Tommaso Soru, Olaf Hartig, Martin Voigt, Axel-Cyrille Ngonga Ngomo

Semantics, 2017, #inproceedings

The Tale of Sansa Spark

By Ivan Ermilov, Jens Lehmann, Gezim Sejdiu, Lorenz Bühmann, Patrick Westphal, Claus Stadler, Simon Bin, Nilesh Chakraborty, Henning Petzka, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, Hajira Jabeen

Proceedings of 16th International Semantic Web Conference, Poster & Demos, 2017, #inproceedings

Benchmarking RDF Storage Solutions with IGUANA

By Felix Conrads, Jens Lehmann, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

Proceedings of 16th International Semantic Web Conference - Poster & Demos, 2017, #inproceedings

SQCFramework: SPARQL Query Containment Benchmark Generation Framework

By Muhammad Saleem, Claus Stadler, Qaiser Mehmood, Jens Lehmann, Axel-Cyrille Ngonga Ngomo

K-CAP 2017: Knowledge Capture Conference, 2017, #inproceedings

Torpedo: Improving the State-of-the-Art RDF~Dataset~Slicing

By Edgard Marx, Saeedeh Shekarpour, Tommaso Soru, Adrian M.P. Brasoveanu, Muhammad Saleem, Ciro Baron, Albert Weichselbraun, Jens Lehmann, Axel-Cyrille Ngonga Ngomo, Sören Auer

11th IEEE International Conference on Semantic Computing, Jan 30-Feb 1, 2017, San Diego, California, USA, 2017, #inproceedings

Federated Query Formulation and Processing through BioFed

By Ali Hasnain, Syeda Sana e Zainab, Dure Zehra, Qaiser Mehmood, Muhammad Saleem, Dietrich Rebholz-Schuhmann

SeWebMDA workshop at ESWC, 2017, #inproceedings

IGUANA: A Generic Framework for Benchmarking the Read-Write Performance of Triple Stores

By Felix Conrads, Jens Lehmann, Muhammad Saleem, Mohamed Morsey, and Axel-Cyrille Ngonga Ngomo

International Semantic Web Conference (ISWC), 2017, #inproceedings

LargeRDFBench: A Billion Triples Benchmark for SPARQL Endpoint Federation

By Muhammad Saleem, Ali Hasnainb, Axel-Cyrille Ngonga Ngomo

Journal of Web Semantics (JWS), 2017, #inproceedings

DIESEL -- Distributed Search over Large Enterprise Data

By Ricardo Usbeck, Michael Röder, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

ESWC, EU networking session, 2016, #inproceedings

Efficient Source Selection For SPARQL Endpoint Query Federation

By Muhammad Saleem

PhD thesis at AKSW, University of Leipzig Germany, 2016, #inproceedings

Requirements to Modern Semantic Search Engines

By Ricardo Usbeck, Michael Röder, Peter Haase, Artem Kozlov, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

KESW, 2016, #inproceedings

SPARQL Querying Benchmarks

By Muhammad Saleem, Ricardo Usbeck, Michael Röder, Axel-Cyrille Ngonga Ngomo

Tutorial at ISWC, 2016, #inproceedings

Federated Query Processing: Challenges and Opportunities

By Axel-Cyrille Ngonga Ngomo, Muhammad Saleem

Keynote at PROFILES at Extended Semantic Web Conference (ESWC), 2016, #inproceedings

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

By Ethem Cem Ozkan, Muhammad Saleem, Erdogan Dogdu, Axel-Cyrille Ngonga Ngomo

PROFILES at Extended Semantic Web Conference (ESWC), 2016, #inproceedings

FedViz: A Visual Interface for SPARQL Queries Formulation and Execution

By Syeda Sana e Zainab, Ali Hasnain, Muhammad Saleem, Qaiser Mehmood, Durre Zehra, Stefan Decker

VOILA at ISWC, 2015, #inproceedings

LSQ: The Linked SPARQL Queries Dataset

By Muhammad Saleem, Intizar Ali, Aidan Hogan, Qaiser Mehmood, Axel-Cyrille Ngonga Ngomo

International Semantic Web Conference (ISWC), 2015, #inproceedings

Federated Query Processing over Linked Data

By Muhammad Saleem, Muhammad Intizar Ali, Ruben Verborgh, Axel-Cyrille Ngonga Ngomo

Tutorial at ISWC, 2015, #inproceedings

The LSQ Dataset: Querying for Queries

By Muhammad Saleem, Intizar Ali, Aidan Hogan, Qaiser Mehmood, Axel-Cyrille Ngonga Ngomo

International Semantic Web Conference (ISWC), 2015, #inproceedings

FEASIBLE: A Feature-Based SPARQL Benchmark Generation Framework

By Muhammad Saleem, Qaiser Mehmood, Axel-Cyrille Ngonga Ngomo

International Semantic Web Conference (ISWC), 2015, #inproceedings

Automatic SPARQL Benchmark Generation Using FEASIBLE

By Muhammad Saleem, Qaiser Mehmood, Axel-Cyrille Ngonga Ngomo

International Semantic Web Conference (ISWC), 2015, #inproceedings

SPARQL Query Formulation and Execution using FedViz

By Syeda Sana e Zainab, Ali Hasnain, Muhammad Saleem, Qaiser Mehmood, Durre Zehra, Stefan Decker

International Semantic Web Conference (ISWC), 2015, #inproceedings

QFed: Query Set For Federated SPARQL Query Benchmark

By Nur Aini Rakhmawati, Muhammad Saleem, Sarasi Lalithsena, Stefan Decker

The 16th International Conference on Information Integration and Web-based Applications & Services (iiWAS2014), 2014, #inproceedings

GenomeSnip: Fragmenting the Genomic Wheel to augment discovery in cancer research

By Maulik R Kamdar, Aftab Iqbal, Muhammad Saleem, Helena F Deus, Stefan Decker

Conference on Semantics in Healthcare and Life Sciences (CSHALS) 2014, 2014, #inproceedings

Big Linked Cancer Data: Integrating Linked TCGA and PubMed

By Muhammad Saleem, Maulik Kamdar, Aftab Iqbal, Shanmukha Sampath, Helena Deus, Axel-Cyrille Ngonga Ngomo

Web Semantics: Science, Services and Agents on the World Wide Web, 2014, #article

TopFed: TCGA Tailored Federated Query Processing and Linking to LOD

By Muhammad Saleem, Shanmukha Sampath, Axel-Cyrille Ngonga Ngomo, Aftab Iqbal, Jonas Almeida, Helena Deus

Journal of Biomedical Semantics, 2014, #article

SAFE: Policy Aware SPARQL Query Federation Over RDF Data Cubes

By Yasar Khan, Muhammad Saleem, Aftab Iqbal, Muntazir Mehdi, Aidan Hogan, Panagiotis Hasapis, Axel-Cyrille Ngonga Ngomo, Stefan Decker, Ratnesh Sahay

Semantic Web Applications and Tools for Life Sciences(SWAT4LS), 2014, #inproceedings

Web-Scale Extension of RDF Knowledge Bases from Templated Websites

By Lorenz Bühmann, Ricardo Usbeck, Axel-Cyrille Ngonga Ngomo, Muhammad Saleem, Andreas Both, Valter Crescenzi, Paolo Merialdo, Disheng Qiu

International Semantic Web Conference (ISWC), 2014, #inproceedings

A Fine-Grained Evaluation of SPARQL Endpoint Federation Systems

By Muhammad Saleem, Yasar Khan, Ali Hasnain, Ivan Ermilov, Axel-Cyrille Ngonga Ngomo

Semantic Web Journal, 2014, #article

HiBISCuS: Hypergraph-Based Source Selection for SPARQL Endpoint Federation

By Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

Extended Semantic Web Conference (ESWC 2014), 2014, #inproceedings

Fostering Serendipity through Big Linked Data

By Muhammad Saleem, Maulik R Kamdar, Aftab Iqbal, Shanmukha Sampath, Helena F Deus, Axel-Cyrille Ngonga Ngomo

Semantic Web Challenge at ISWC2013, 2013, #inproceedings

Linked Cancer Genome Atlas Database

By Muhammad Saleem, Shanmukha Sampath Padmanabhuni, Axel-Cyrille Ngonga Ngomo, Jonas S. Almeida, Stefan Decker, Helena F. Deus

Proceedings of I-Semantics2013, 2013, #inproceedings

DAW: Duplicate-AWare Federated Query Processing over the Web of Data

By Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, Josiane Xavier Parreira, Helena Deus, Manfred Hauswirth

Proceedings of ISWC2013, 2013, #inproceedings

Generic and Personalized Web/Mobile Services by Abstracting and Specializing SQL Queries

By Muhammad Saleem, Iqbal Qasim, Ata ur Rehman

Journal of Internet Technology, 2012, #article

Enhanced Generic Information Services Using Mobile Messaging

By Muhammad Saleem, Ali Zahir, Yasir Ismail, Bilal Saeed

Advances in Grid and Pervasive Computing, 5th International Conference, GPC 2010, Hualien, Taiwan, May 10-13, 2010. Proceedings, 2010, #inproceedings

Cost effective software engineering using program slicing techniques

By Muhammad Saleem, Rasheed Hussain, Yasir Ismail, Shaikh Mohsin

Proceedings of the 2nd International Conference on Interaction Sciences: Information Technology, Culture and Human, 2009, #inproceedings

Generic Information System Using SMS Gateway

By Muhammad Saleem, Kyung-Goo Doh

Computer Sciences and Convergence Information Technology, 2009. ICCIT'09. Fourth International Conference on, 2009, #inproceedings

Fact Checking Knowledge Graphs - A Survey

By Umair Qudus, Michael Röder, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

ACM Comput. Surv., 2025, #article

Multilingual Relation Extraction: A Survey

By Manzoor Ali, René Speck, Hamada M. Zahera, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

IEEE Access, 2025, #article

Enhancing Relation Extraction Through Augmented Data: Large Language Models Unleashed

By Manzoor Ali, Muhammad Sohail Nisar, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

NLDB24, 2024, #inproceedings

Unsupervised Relation Extraction with Sentence level Distributional Semantics

By Manzoor Ali, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo

ICSC, 2023, #inproceedings

RELD: A Knowledge Graph of Relation Extraction Datasets

By Manzoor Ali, Muhammad Saleem, Diego Moussallem, Mohamed Ahmed Sherif, Axel-Cyrille Ngonga Ngomo

ESWC, 2023, #inproceedings