Publications

Laskowski, Lukas; Hladik, Michael; Portisch, Jan; Panse, Fabian; Naumann, Felix. Burr: An Benchmark for Ontology Learning from Relational Databases. In: Proceedings of the ACM on Management of Data, Volume 3 Issue 6. ACM. 2025.

Paulheim, Heiko; Ristoski, Petar; Portisch, Jan. Embedding Knowledge Graphs with RDF2vec. Springer Nature. 2023. ISBN: 978-3-031-30386-9.

Breit, Anna; Waltersdorfer, Laura; Ekaputra, Fajar J.; Sabou, Marta; Ekelhart, Andreas; Iana, Andreea; Paulheim, Heiko; Portisch, Jan; Revenko, Artem; ten Teije, Annette; van Harmelen, Frank. Combining Machine Learning and Semantic Web: A Systematic Mapping Study. In: ACM Computing Surveys. 2023.

Portisch, Jan. Exploiting General-Purpose Background Knowledge for Automated Schema Matching. In: Dissertation at the University of Mannheim. 2022.

Portisch, Jan; Paulheim, Heiko. The DLCC Node Classification Benchmark for Analyzing Knowledge Graph Embeddings. In: International Semantic Web Conference 2022. 2022.

Biswas, Russa; Portisch, Jan; Alam, Mehwish; Sack, Harald; Paulheim, Heiko. Entity Type Prediction Leveraging Graph Walks and Entity Descriptions. In: International Semantic Web Conference 2022. 2022.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. Background Knowledge in Ontology Matching: A Survey. In: Semantic Web Journal (SWJ). 2022.

Hertling, Sven; Portisch, Jan; Paulheim, Heiko. KERMIT - A Transformer-Based Approach for Knowledge Graph Matching. In: Deep Learning meets Ontologies and Natural Language Processing (DeepOntoNLP2022) in conjunction with the ESWC 2022. 2022.

Portisch, Jan; Costa, Guilherme; Stefani, Karolin; Kreplin, Katharina; Hladik, Michael; Paulheim, Heiko. Ontology Matching Through Absolute Orientation of Embedding Spaces. In: The Semantic Web: ESWC 2022 Satellite Events. 2022.

Portisch, Jan; Paulheim, Heiko. Walk this Way! Entity Walks and Property Walks for RDF2vec. In: The Semantic Web: ESWC 2022 Satellite Events. 2022.

Portisch, Jan; Heist, Nicolas; Paulheim, Heiko. Knowledge Graph Embedding for Data Mining vs. Knowledge Graph Embedding for Link Prediction - Two Sides of the Same Coin?. In: Semantic Web Journal (SWJ). 13(3). Pp. 399--422. 2022.

Hertling, Sven; Portisch, Jan; Paulheim, Heiko. Matching with Transformers in MELT. In: Proceedings of the 16th International Workshop on Ontology Matching co-located with the 20th International Semantic Web Conference (ISWC 2021), OM@ISWC 2021. 2022.

Abd Nikooie Pour, Mina; Algergawy, Alsayed; Amardeilh, Florence; Amini, Reihaneh; Fallatah, Omaima; Faria, Daniel; Fundulaki, Irini; Harrow, Ian; Hertling, Sven; Hitzler, Pascal; Huschka, Martin; Ibanescu, Liliana; Jiménez-Ruiz, Ernesto; Karam, Naouel; Laadhar, Amir; Lambrix, Patrick; Li, Huanyu; Li, Ying; Michel, Franck; Nasr, Engy; Paulheim, Heiko; Pesquita, Catia; Portisch, Jan; Roussey, Catherine; Saveta, Tzanina; Splendiani, Andrea; Trojahn, Cássia; Vataščinová, Jana; Yaman, Beyza; Zamazal, Ondřej; Zhou, Lu. Results of the Ontology Alignment Evaluation Initiative 2021. In: Proceedings of the 16th International Workshop on Ontology Matching co-located with the 20th International Semantic Web Conference (ISWC 2021), OM@ISWC 2021. 2022.

Portisch, Jan; Paulheim, Heiko. ALOD2Vec Matcher Results for OAEI 2021. In: Proceedings of the 16th International Workshop on Ontology Matching co-located with the 20th International Semantic Web Conference (ISWC 2021), OM@ISWC 2021. 2022.

Portisch, Jan; Paulheim, Heiko. Wiktionary Matcher Results for OAEI 2021. In: Proceedings of the 16th International Workshop on Ontology Matching co-located with the 20th International Semantic Web Conference (ISWC 2021), OM@ISWC 2021. 2022.

Knorr, Leon; Portisch, Jan. Fine-TOM Matcher Results for OAEI 2021. In: Proceedings of the 16th International Workshop on Ontology Matching co-located with the 20th International Semantic Web Conference (ISWC 2021), OM@ISWC 2021. 2022.

Kossack, Daniel; Borg, Niklas; Knorr, Leon; Portisch, Jan. TOM Matcher Results for OAEI 2021. In: Proceedings of the 16th International Workshop on Ontology Matching co-located with the 20th International Semantic Web Conference (ISWC 2021), OM@ISWC 2021. 2022.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. Background Knowledge in Schema Matching: Strategy vs. Data. In: Proceedings of the International Semantic Web Conference, ISWC 2021. 2021.

Portisch, Jan; Paulheim, Heiko. Putting RDF2vec in Order. In: Proceedings of the International Semantic Web Conference - Posters and Demos, ISWC 2021. 2021.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. FinMatcher at FinSim-2: Hypernymy Detection in the Financial Services Domain using Knowledge Graphs. In: Workshop on Financial Technology on the Web (FinWeb) in conjunction with The Web Conference. 2021.

Hertling, Sven; Portisch, Jan; Paulheim, Heiko. Supervised Ontology and Instance Matching with MELT. In: The Fifteenth International Workshop on Ontology Matching co-located with the 19th International Semantic Web Conference ISWC. 2020.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. ALOD2Vec Matcher Results for OAEI 2020. In: The Fifteenth International Workshop on Ontology Matching co-located with the 19th International Semantic Web Conference ISWC. 2020.

Monych, Michael; Portisch, Jan; Hladik, Michael; Paulheim, Heiko. DESKMatcher. In: The Fifteenth International Workshop on Ontology Matching co-located with the 19th International Semantic Web Conference ISWC. 2020.

Portisch, Jan; Paulheim, Heiko. Wiktionary Matcher Results for OAEI 2020. In: The Fifteenth International Workshop on Ontology Matching co-located with the 19th International Semantic Web Conference ISWC. 2020.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. RDF2Vec Light - A Lightweight Approach for Knowledge Graph Embeddings. In: International Semantic Web Conference (ISWC) 2020, Posters and Demonstrations Track. 2020.

Portisch, Jan; Fallatah, Omaima; Neumaier, Sebastian; Jaradeh, Mohamad Yaser; Polleres, Axel. Challenges of Linking Organizational Information in Open Government Data to Knowledge Graphs. In: Proceedings of the 22nd International Conference on Knowledge Engineering and Knowledge Management (EKAW 2020). 2020.

Portisch, Jan. Towards Matching of Domain-Specific Schemas Using General-Purpose External Background Knowledge. In: The Semantic Web: ESWC 2020 Satellite Events. 2020.

Portisch, Jan; Hertling, Sven; Paulheim, Heiko. Visual Analysis of Ontology Matching Results with the MELT Dashboard. In: The Semantic Web: ESWC 2020 Satellite Events. 2020.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. KGvec2go - Knowledge Graph Embeddings as a Service. In: Language Resources and Evaluation Conference (LREC). 2020.

Portisch, Jan; Emonet, Vincent; Jaradeh, Mohamad Yaser; Fallatah, Omaima; Koteich, Bilal; Espinoza-Arias, Paola; Polleres, Axel. Tracking the Evolution of Public Datasets and Their Governance Bodies by Linking Open Data. In: Knowledge Graphs Evolution and Preservation - A Technical Report from ISWS 2019. 2020.

Hertling, Sven; Portisch, Jan; Paulheim, Heiko. MELT - Matching Evaluation Toolkit. In: Lecture Notes in Computer Science Semantic Systems - The Power of AI and Knowledge Graphs. 15th International Conference, SEMANTiCS 2019. Karlsruhe, Germany. September 9–12. 2019.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. Evaluating Ontology Matchers on Real-World Financial Services Data Models. In: SEMANTiCS 2019. Karlsruhe, Germany. 2019.

Portisch, Jan; Hladik, Michael; Paulheim, Heiko. Wiktionary Matcher. In: CEUR Workshop Proceedings OM 2019 - Proceedings of the 14th International Workshop on Ontology Matching co-located with the 18th International Semantic Web Conference (ISWC 2019). Auckland, New Zealand. October 26. Pages 181 - 188. 2019.

Portisch, Jan; Paulheim, Heiko. ALOD2Vec Matcher. In: CEUR Workshop Proceedings OM 2018 - Proceedings of the 13th International Workshop on Ontology Matching co-located with the 17th International Semantic Web Conference (ISWC 2018). Monterey, CA, USA. October 8. Pages 132 - 137. 2018.

Portisch, Jan. Automatic Schema Matching Utilizing Hypernymy Relations Extracted From the Web. 2018.

Hofmann, Alexandra; Perchani, Samresh; Portisch, Jan; Hertling, Sven; Paulheim, Heiko. DBkWik: Towards Knowledge Graph Creation From Thousands of Wikis. In: Proceedings of the ISWC 2017 Posters & Demonstrations and Industry Tracks co-located with 16th International Semantic Web Conference (ISWC 2017). Vienna, Austria. October 23rd to 25th. 2017.

Jan Portisch; Michael Hladik; Yannik Hahn. Automatic enforcement of standardized data model mapping. Application Number: 19/039,706. 2025.

Jan Portisch; Sandra Bracholdt; Michael Hladik; Oliver Huth. Systems and Methods for Intelligent Labeling of Instance Data Clusters Based on Knowledge Graph. Patent Number: US 11,954,605 B2. 2024.

Guilherme Erhardt Ferreira Costa; Jan Portisch. Searchable Catalog of Columnar Numerical Data. Patent Number: US 11,886,409 B1. 2024.

Jan Portisch; Sandra Bracholdt; Volker Saggau. Schema-based Data Retrieval from Knowledge Graphs. Patent Number: US 11,907,182 B2. Application Number: 17/470,988. 2024.

Jan Portisch; Radu Purdel; Dirk Becker; Markus Bucher; Sandra Bracholdt. List Alignment Meta Structure and Tool. Patent Number: US 2023-0177023 A1. Application Number: 17/543,288. 2023.

Jan Portisch; Sandra Bracholdt. Relationship Analysis Using Vector Representations of Database Tables. Patent Number: US 11,620,271 B2. 2023.

Jan Portisch; Volker Saggau; Sandra Bracholdt. Generation of Realistic Mock Data. Patent Number: US 11,599,517 B2. 2023.

Jan Portisch; Roland Boehle; Sandra Bracholdt; Volker Saggau. Transformation Rule Generation and Validation. Patent Number: US 11,593,392 B2. 2023.

Jan Portisch; Sandra Bracholdt; Ulrich Block; Volker Saggau. Metadata Object Identifier Registry. Patent Number: US 2023-0047681 A1. Application Number: 17/395,901. 2023.

Sandra Bracholdt; Volker Saggau; Jan Portisch. Path Generation and Selection Tool for Database Objects. Patent Number: US 11,449,529 B2. 2022.

Sandra Bracholdt; Volker Saggau; Jan Portisch. Schema Alignment and Structural Data Mapping of Database Objects. Patent Number: US 11,263,187 B2. 2022.

Joachim Groß; Jan Portisch. Automatic Source Code Refactoring. Patent Number: US 11,288,062 B2. 2022.

Stephan Schub; Jan Portisch; Michael Monych. Semantic, Single-Column Identifiers for Data Entries. Patent Number: US 11,334,549 B2. 2022.

Jan Portisch; Sandra Bracholdt; Björn Pantel; Volker Saggau. Clustering Within Database Data Models. Patent Number: US 11,422,984 B2. 2022.

Jan Portisch; Sandra Bracholdt; Volker Saggau. Dynamic Generation of Join Statements for Database Operations. Patent Number: US 11,144,549 B2. 2021.

Jan Portisch; Joachim Groß; Sandra Bracholdt. Logical, Recursive Definitions of Data Transformations. Patent Number: US 11,106,861 B2. 2021.

Jan Portisch; Björn Pantel; Benjamin Merkle; Stephan Schub; Sandra Bracholdt; Roland Kolata; Michael Hladik; Christoph Meinel. Automatic Conversion of Data Models Using Data Model Annotations. Patent Number: US 2021-0240675 A1. Application Number: 16/780,481. 2021.

Jan Portisch; Roland Boehle; Volker Saggau; Sandra Bracholdt. Rule Mining for Rule and Logic Statement Development. Patent Number: US 2021-0073655 A1. Application Number: 16/567,470. 2021.

Sandra Bracholdt; Joachim Groß; Volker Saggau; Jan Portisch. Matching Metastructure for Data Modeling. Patent Number: US 2020-0349130 A1. Application Number: 16/399,533. 2020.

Jan Portisch; Sandra Bracholdt; Volker Saggau. Dynamic Automatic Generation of Database Views. Patent Number: US 10,901,987 B2. 2020.

Sandra Bracholdt; Volker Saggau; Jan Portisch. Path Generation and Selection Tool for Database Objects. Patent Number: US 10,726,052 B2. 2020.