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377 Publications


2024 | Conference Paper | LibreCat-ID: 54084
Efficient Evaluation of Conjunctive Regular Path Queries Using Multi-way Joins
N. Karalis, A. Bigerl, L. Heidrich, M. Sherif, A.-C. Ngonga Ngomo, in: ESWC, 2024.
LibreCat
 

2023 | Research Data | LibreCat-ID: 45560
RELD: A Knowledge Graph of Relation Extraction Datasets
M. Ali, M. Saleem, D. Moussallem, M. Sherif, A.-C. Ngonga Ngomo, RELD: A Knowledge Graph of Relation Extraction Datasets, LibreCat University, 2023.
LibreCat | DOI
 

2023 | Conference Paper | LibreCat-ID: 33734 | OA
Neural Class Expression Synthesis
N.J. KOUAGOU, S. Heindorf, C. Demir, A.-C. Ngonga Ngomo, in: C. Pesquita, E. Jimenez-Ruiz, J. McCusker, D. Faria, M. Dragoni, A. Dimou, R. Troncy, S. Hertling (Eds.), The Semantic Web - 20th Extended Semantic Web Conference (ESWC 2023), Springer International Publishing, 2023, pp. 209–226.
LibreCat | DOI | Download (ext.)
 

2023 | Preprint | LibreCat-ID: 37937
Counterfactual Explanations for Concepts in ELH
L.N. Sieger, S. Heindorf, L. Blübaum, A.-C. Ngonga Ngomo, ArXiv:2301.05109 (2023).
LibreCat | Download (ext.) | arXiv
 

2023 | Book Chapter | LibreCat-ID: 45884 | OA
Configuration and Evaluation
J.M. Hanselle, E. Hüllermeier, F. Mohr, A.-C. Ngonga Ngomo, M. Sherif, A. Tornede, M.D. Wever, in: C.-J. Haake, F. Meyer auf der Heide, M. Platzner, H. Wachsmuth, H. Wehrheim (Eds.), On-The-Fly Computing -- Individualized IT-Services in Dynamic Markets, Heinz Nixdorf Institut, Universität Paderborn, Paderborn, 2023, pp. 85–104.
LibreCat | Files available | DOI
 

2023 | Conference Paper | LibreCat-ID: 46514
COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge Graphs
A. Becker, A.F.A. Ahmed, M. Sherif, A.-C. Ngonga Ngomo, in: SEMANTiCS, 2023.
LibreCat
 

2023 | Book Chapter | LibreCat-ID: 46516
Explainable Integration of Knowledge Graphs Using Large Language Models
A.F.A. Ahmed, A.F. Firmansyah, M. Sherif, D. Moussallem, A.-C. Ngonga Ngomo, in: Natural Language Processing and Information Systems, Springer Nature Switzerland, Cham, 2023.
LibreCat | DOI
 

2023 | Conference Paper | LibreCat-ID: 46518
Using Pre-trained Language Models for Abstractive DBpedia Summarization: A Comparative Study
H.M.A. Zahera, F. Vitiugin, M. Sherif, C. Castillo, A.-C. Ngonga Ngomo, in: SEMANTiCS, 2023.
LibreCat
 

2023 | Research Data | LibreCat-ID: 45558
IngridKG: A FAIR Knowledge Graph of Graffiti
M. Sherif, A.A. Morim da Silva, S. Pestryakova, A.F.A. Ahmed, S. Niemann, A.-C. Ngonga Ngomo, IngridKG: A FAIR Knowledge Graph of Graffiti, LibreCat University, 2023.
LibreCat | DOI
 

2023 | Book Chapter | LibreCat-ID: 47421
Neural Class Expression Synthesis in ALCHIQ(D)
N.J. Kouagou, S. Heindorf, C. Demir, A.-C. Ngonga Ngomo, in: Machine Learning and Knowledge Discovery in Databases: Research Track, Springer Nature Switzerland, Cham, 2023.
LibreCat | DOI
 

2023 | Book Chapter | LibreCat-ID: 46460
Class Expression Learning with Multiple Representations
A.-C. Ngonga Ngomo, C. Demir, N.J. Kouagou, S. Heindorf, N. Karalis, A. Bigerl, in: Compendium of Neurosymbolic Artificial Intelligence, IOS Press, 2023, pp. 272–286.
LibreCat
 

2023 | Journal Article | LibreCat-ID: 46248 | OA
LitCQD: Multi-Hop Reasoning in Incomplete Knowledge Graphs with Numeric Literals
C. Demir, M. Wiebesiek, R. Lu, A.-C. Ngonga Ngomo, S. Heindorf, ECML PKDD (2023).
LibreCat | Files available
 

2023 | Conference Paper | LibreCat-ID: 50797
A Topic Model for the Data Web
M. Röder, D. Kuchelev, A.-C. Ngonga Ngomo, in: F. Ortiz-Rodriguez, B. Villazón-Terrazas, S. Tiwari, C. Bobed (Eds.), Knowledge Graphs and Semantic Web, Springer Nature Switzerland, Cham, 2023, pp. 183–198.
LibreCat | DOI
 

2022 | Conference Paper | LibreCat-ID: 31806
ADAGIO - Automated Data Augmentation of Knowledge Graphs Using Multi-expression Learning
K. Dreßler, M. Sherif, A.-C. Ngonga Ngomo, in: Proceedings of the 33rd ACM Conference on Hypertext and Hypermedia, 2022.
LibreCat | DOI
 

2022 | Preprint | LibreCat-ID: 31545 | OA
Kronecker Decomposition for Knowledge Graph Embeddings
C. Demir, J. Lienen, A.-C. Ngonga Ngomo, ArXiv:2205.06560 (2022).
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2022 | Conference Paper | LibreCat-ID: 29290 | OA
EvoLearner: Learning Description Logics with Evolutionary Algorithms
S. Heindorf, L. Blübaum, N. Düsterhus, T. Werner, V.N. Golani, C. Demir, A.-C. Ngonga Ngomo, in: WWW, ACM, 2022, pp. 818–828.
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2022 | Conference Paper | LibreCat-ID: 35541
MultPAX: Keyphrase Extraction Using Language Models and Knowledge Graphs
H.M. Zahera, D. Vollmers, M.A. Sherif, A.-C. Ngonga Ngomo, in: U. Sattler, A. Hogan, C.M. Keet, V. Presutti, J.P.A. Almeida, H. Takeda, P. Monnin, G. Pirrò, C. d’Amato (Eds.), The Semantic Web - ISWC 2022 - 21st International Semantic Web Conference, Virtual Event, October 23-27, 2022, Proceedings, Springer, 2022, pp. 303–318.
LibreCat | DOI
 

2022 | Conference Paper | LibreCat-ID: 35540
Can Machine Translation be a Reasonable Alternative for Multilingual Question Answering Systems over Knowledge Graphs?
A. Perevalov, A. Both, D. Diefenbach, A.-C. Ngonga Ngomo, in: F. Laforest, R. Troncy, E. Simperl, D. Agarwal, A. Gionis, I. Herman, L. Médini (Eds.), WWW ’22: The ACM Web Conference 2022, Virtual Event, Lyon, France, April 25 - 29, 2022, ACM, 2022, pp. 977–986.
LibreCat | DOI
 

2022 | Conference (Editor) | LibreCat-ID: 35538
Proceedings of the QuWeDa 2022: 6th Workshop on Storing, Querying and Benchmarking Knowledge Graphs co-located with 21st International Semantic Web Conference (ISWC 2022), Hangzhou, China, 23-27 October 2022
M. Saleem, A.-C. Ngonga Ngomo, DE, eds., Proceedings of the QuWeDa 2022: 6th Workshop on Storing, Querying and Benchmarking Knowledge Graphs Co-Located with 21st International Semantic Web Conference (ISWC 2022), Hangzhou, China, 23-27 October 2022, CEUR-WS.org, 2022.
LibreCat
 

2022 | Conference Paper | LibreCat-ID: 35544
Hashing the Hypertrie: Space- and Time-Efficient Indexing for SPARQL in Tensors
A. Bigerl, L. Conrads, C. Behning, M. Saleem, A.-C. Ngonga Ngomo, in: U. Sattler, A. Hogan, C.M. Keet, V. Presutti, J.P.A. Almeida, H. Takeda, P. Monnin, G. Pirrò, C. d’Amato (Eds.), The Semantic Web - ISWC 2022 - 21st International Semantic Web Conference, Virtual Event, October 23-27, 2022, Proceedings, Springer, 2022, pp. 57–73.
LibreCat | DOI
 

2022 | Conference Paper | LibreCat-ID: 35543
REBench: Microbenchmarking Framework for Relation Extraction Systems
M. Ali, M. Saleem, A.-C. Ngonga Ngomo, in: U. Sattler, A. Hogan, C.M. Keet, V. Presutti, J.P.A. Almeida, H. Takeda, P. Monnin, G. Pirrò, C. d’Amato (Eds.), The Semantic Web - ISWC 2022 - 21st International Semantic Web Conference, Virtual Event, October 23-27, 2022, Proceedings, Springer, 2022, pp. 643–659.
LibreCat | DOI
 

2022 | Conference Paper | LibreCat-ID: 35542
Rapid Explainability for Skill Description Learning
C. Demir, A. Himmelhuber, Y. Liu, A. Bigerl, D. Moussallem, A.-C. Ngonga Ngomo, in: A. Dimou, A. Haller, A.L. Gentile, P. Ristoski (Eds.), Proceedings of the ISWC 2022 Posters, Demos and Industry Tracks: From Novel Ideas to Industrial Practice Co-Located with 21st International Semantic Web Conference {(ISWC} 2022), Virtual Conference, Hangzhou, China, October 23-27, 2022, CEUR-WS.org, 2022.
LibreCat
 

2022 | Conference Paper | LibreCat-ID: 35545
LSQ Framework: The LSQ Framework for SPARQL Query Log Processing
C. Stadler, M. Saleem, A.-C. Ngonga Ngomo, in: M. Saleem, A.-C.N. Ngomo (Eds.), Proceedings of the QuWeDa 2022: 6th Workshop on Storing, Querying and Benchmarking Knowledge Graphs Co-Located with 21st International Semantic Web Conference {(ISWC} 2022), Hangzhou, China, 23-27 October 2022, CEUR-WS.org, 2022, pp. 49–64.
LibreCat
 

2022 | Conference Paper | LibreCat-ID: 35547
Kronecker Decomposition for Knowledge Graph Embeddings
C. Demir, J. Lienen, A.-C. Ngonga Ngomo, in: A. Bellogín, L. Boratto, F. Cena (Eds.), HT ’22: 33rd ACM Conference on Hypertext and Social Media, Barcelona, Spain, 28 June 2022- 1 July 2022, ACM, 2022, pp. 1–10.
LibreCat | DOI
 

2022 | Journal Article | LibreCat-ID: 35551
A survey of RDF stores & SPARQL engines for querying knowledge graphs
W. Ali, M. Saleem, B. Yao, A. Hogan, A.-C. Ngonga Ngomo, VLDB J. 31 (2022) 1–26.
LibreCat | DOI
 

2022 | Journal Article | LibreCat-ID: 35552
Hardware-agnostic computation for large-scale knowledge graph embeddings
C. Demir, A.-C. Ngonga Ngomo, Softw. Impacts 13 (2022) 100377.
LibreCat | DOI
 

2022 | Book Chapter | LibreCat-ID: 33738 | OA
Tab2Onto: Unsupervised Semantification with Knowledge Graph Embeddings
H.M.A. Zahera, S. Heindorf, S. Balke, J. Haupt, M. Voigt, C. Walter, F. Witter, A.-C. Ngonga Ngomo, in: The Semantic Web: ESWC 2022 Satellite Events, Springer International Publishing, Cham, 2022.
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2022 | Conference Paper | LibreCat-ID: 33739 | OA
CausalQA: A Benchmark for Causal Question Answering
A. Bondarenko, M. Wolska, S. Heindorf, L. Blübaum, A.-C. Ngonga Ngomo, B. Stein, P. Braslavski, M. Hagen, M. Potthast, in: Proceedings of the 29th International Conference on Computational Linguistics, International Committee on Computational Linguistics, Gyeongju, Republic of Korea, 2022, pp. 3296–3308.
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2022 | Journal Article | LibreCat-ID: 29851 | OA
CovidPubGraph: A FAIR Knowledge Graph of COVID-19 Publications
S. Pestryakova, D. Vollmers, M. Sherif, S. Heindorf, M. Saleem, D. Moussallem, A.-C. Ngonga Ngomo, Scientific Data (2022).
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2022 | Conference Paper | LibreCat-ID: 46538
MultPAX: Keyphrase Extraction using Language Models and Knowledge Graphs
H.M.A. Zahera, D. Vollmers, M. Sherif, A.-C. Ngonga Ngomo, in: ISWC 2022, Springer, Cham, n.d.
LibreCat | DOI
 

2022 | Conference Paper | LibreCat-ID: 32509
HybridFC: A Hybrid Fact-Checking Approach for Knowledge Graphs
U. Qudus, M. Röder, M. Saleem, A.-C. Ngonga Ngomo, in: U. Sattler, A. Hogan, M. Keet, V. Presutti (Eds.), The Semantic Web -- ISWC 2022, Springer International Publishing, Cham, n.d., pp. 462--480.
LibreCat | Files available | DOI
 

2022 | Book Chapter | LibreCat-ID: 33740 | OA
Learning Concept Lengths Accelerates Concept Learning in ALC
N.J. KOUAGOU, S. Heindorf, C. Demir, A.-C. Ngonga Ngomo, in: The Semantic Web, Springer International Publishing, Cham, 2022.
LibreCat | Files available | DOI | Download (ext.)
 

2021 | Journal Article | LibreCat-ID: 24721
Multilingual Verbalization and Summarization for Explainable Link Discovery
A. Fathi Ahmed, M. Ahmed Sherif, D. Moussallem, A.-C. Ngonga Ngomo, Data Knowl. Eng. 133 (2021) 101874.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24722
Applying Grammar-Based Compression to RDF
M. Röder, P. Frerk, F. Conrads, A.-C. Ngonga Ngomo, in: R. Verborgh, K. Hose, H. Paulheim, P.-A. Champin, M. Maleshkova, O. Corcho, P. Ristoski, M. Alam (Eds.), The Semantic Web - 18th International Conference, {ESWC} 2021, Virtual Event, June 6-10, 2021, Proceedings, Springer, 2021, pp. 93–108.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24723
Unsupervised Relation Extraction Using Sentence Encoding
M. Ali, M. Saleem, A.-C. Ngonga Ngomo, in: R. Verborgh, A. Dimou, A. Hogan, C. d’Amato, I. Tiddi, A. Br{\"{o}}ring, S. Maier, F. Ongenae, R. Tommasini, M. Alam (Eds.), The Semantic Web: {ESWC} 2021 Satellite Events - Virtual Event, June 6-10, 2021, Revised Selected Papers, Springer, 2021, pp. 136–140.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24724
Unsupervised Relation Extraction Using Sentence Encoding
M. Ali, M. Saleem, A.-C. Ngonga Ngomo, in: R. Verborgh, A. Dimou, A. Hogan, C. d’Amato, I. Tiddi, A. Br{\"{o}}ring, S. Maier, F. Ongenae, R. Tommasini, M. Alam (Eds.), The Semantic Web: {ESWC} 2021 Satellite Events - Virtual Event, June 6-10, 2021, Revised Selected Papers, Springer, 2021, pp. 136–140.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24725
InferNER: an attentive model leveraging the sentence-level information for Named Entity Recognition in Microblogs
M. Shahzad, A. Amin, D. Esteves, A.-C. Ngonga Ngomo, in: E. Bell, F. Keshtkar (Eds.), Proceedings of the Thirty-Fourth International Florida Artificial Intelligence Research Society Conference, North Miami Beach, Florida, USA, May 17-19, 2021, 2021.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24726
Lemming - Example-based Mimicking of Knowledge Graphs
M. Röder, P. Thuy Sy Nguyen, F. Conrads, A. Alexandra Morim da Silva, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 62–69.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24727
SYNTHG: Mimicking RDF Graphs Using Tensor Factorization
A. Amer Desouki, F. Conrads, M. Röder, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 76–79.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24728
A shallow neural model for relation prediction
C. Demir, D. Moussallem, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 179–182.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24729
Template-based Question Answering using Recursive Neural Networks
R. G. Athreya, S. Kona Bansal, A.-C. Ngonga Ngomo, R. Usbeck, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 195–198.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24730
LAUREN - Knowledge Graph Summarization for Question Answering
R. Jalota, D. Vollmers, D. Moussallem, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 221–226.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24731
Relicensing Combined Datasets
A. Wilke, A. Bannoura, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 241–247.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 24732
ORCA - a Benchmark for Data Web Crawlers
M. Röder, G. de Souza, D. Kuchelev, A. Amer Desouki, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 272–279.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 25203
Using Compositional Embeddings for Fact Checking
A. Alexandra Morim da Silva, M. Röder, A.-C. Ngonga Ngomo, in: A. Hotho, E. Blomqvist, S. Dietze, A. Fokoue, Y. Ding, P. M. Barnaghi, A. Haller, M. Dragoni, H. Alani (Eds.), The Semantic Web - {ISWC} 2021 - 20th International Semantic Web Conference, {ISWC} 2021, Virtual Event, October 24-28, 2021, Proceedings, Springer, 2021, pp. 270–286.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 25206
Convolutional Complex Knowledge Graph Embeddings
C. Demir, A.-C. Ngonga Ngomo, in: R. Verborgh, K. Hose, H. Paulheim, P.-}Antoine Champin, M. Maleshkova, O. Corcho, P. Ristoski, M. Alam (Eds.), The Semantic Web - 18th International Conference, {ESWC} 2021, Virtual Event, June 6-10, 2021, Proceedings, Springer, 2021, pp. 409–424.
LibreCat | DOI
 

2021 | Conference Paper | LibreCat-ID: 25208
Twitter Network Mimicking for Data Storage Benchmarking
R. Speck, D. Moussallem, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 298–305.
LibreCat | DOI
 

2021 | Journal Article | LibreCat-ID: 25209
A shallow neural model for relation prediction
C. Demir, D. Moussallem, A.-C. Ngonga Ngomo, CoRR abs/2101.09090 (2021).
LibreCat
 

2021 | Journal Article | LibreCat-ID: 25210
A Survey of RDF Stores \& SPARQL Engines for Querying Knowledge Graphs
W. Ali, M. Saleem, B. Yao, A. Hogan, A.-C. Ngonga Ngomo, CoRR abs/2102.13027 (2021).
LibreCat
 

2021 | Journal Article | LibreCat-ID: 25211
Knowledge Graph Question Answering using Graph-Pattern Isomorphism
D. Vollmers, R. Jalota, D. Moussallem, H. Topiwala, A.-C. Ngonga Ngomo, R. Usbeck, CoRR abs/2103.06752 (2021).
LibreCat
 

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