Model-Theoretic Characterization of Asher and Vieu's Ontology of Mereotopology. - Torsten Hahmann; Michael Gruninger (KR, 2008)

On the Skeleton of Stonian p-Ortholattices. - Michael Winter 001; Torsten Hahmann; Michael Gruninger (RelMiCS, 2009)

Detecting Physical Defects: A Practical 2D-Study of Cracks and Holes. - Torsten Hahmann; Michael Gruninger (AAAI Spring Symposium: Benchmarking of Qualitative Spatial and Temporal Reasoning Systems, 2009)

Stonian p-ortholattices: A new approach to the mereotopology RT0. - Torsten Hahmann; Michael Winter 001; Michael Gruninger (Artif. Intell., 2009)

Ontology Verification with Repositories. - Michael Grüninger; Torsten Hahmann; Ali Hashemi 001; Darren Ong (FOIS, 2010)

A Naive Theory of Dimension for Qualitative Spatial Relations. - Torsten Hahmann; Michael Gruninger (AAAI Spring Symposium: Logical Formalizations of Commonsense Reasoning, 2011)

Multidimensional Mereotopology with Betweenness. - Torsten Hahmann; Michael Grüninger (IJCAI, 2011)

Exploiting Modularity for Ontology Verification. - Michael Grüninger; Torsten Hahmann; Megan Katsumi (WoMO, 2011)

The Void in Hydro Ontology. - Torsten Hahmann; Boyan Brodaric (FOIS, 2012)

On the algebra of regular sets - Properties of representable Stonian p-ortholattices. - Michael Winter 001; Torsten Hahmann; Michael Grüninger (Ann. Math. Artif. Intell., 2012)

Modular first-order ontologies via repositories. - Michael Grüninger; Torsten Hahmann; Ali Hashemi 001; Darren Ong; Atalay Özgövde (Appl. Ontology, 2012)

Kinds of Full Physical Containment. - Torsten Hahmann; Boyan Brodaric (COSIT, 2013)

Complementation in Representable Theories of Region-Based Space. - Torsten Hahmann; Michael Grüninger (Notre Dame J. Formal Log., 2013)

A Sideways Look at Upper Ontologies. - Michael Grüninger; Torsten Hahmann; Megan Katsumi; Carmen Chui (FOIS, 2014)

Ontology Repositories: A Treasure Trove for Content Ontology Design Patterns. - Torsten Hahmann (WoMO@FOIS, 2014)

Voids and material constitution across physical granularities. - Torsten Hahmann; Boyan Brodaric (FOIS, 2014)

Interdependence among material objects and voids. - Torsten Hahmann; Boyan Brodaric; Michael Grüninger (FOIS, 2014)

An Ontology Design Pattern for Material Transformation. - Charles Vardeman; Adila Krisnadhi; Michelle Cheatham; Krzysztof Janowicz; Holly Ferguson; Pascal Hitzler; Aimee Buccellato; Krishnaprasad Thirunarayan; Gary Berg-Cross; Torsten Hahmann (WOP, 2014)

Towards Ontologies in Variation. - Torsten Hahmann; Sheila A. McIlraith (AAAI Spring Symposia, 2015)

What is in a Contour Map? - A Region-Based Logical Formalization of Contour Semantics. - Torsten Hahmann; E. Lynn Usery (COSIT, 2015)

Internet of things: Toward smart networked systems and societies. - Mark A. Underwood; Michael Gruninger; Leo Obrst; Ken Baclawski; Mike Bennett; Gary Berg-Cross; Torsten Hahmann; Ram D. Sriram (Appl. Ontology, 2015)

A Reconciliation of Logical Representations of Space: from Multidimensional Mereotopology to Geometry. - Torsten Hahmann (2015)

From Data Streams to Fields: Extending Stream Data Models with Field Data Types. - Qinghan Liang; Silvia Nittel; Torsten Hahmann (GIScience, 2016)

A Reference Landform Ontology for Automated Delineation of Depression Landforms from DEMs. - Gaurav Sinha; Samantha T. Arundel; Kathleen Stewart; David M. Mark; Torsten Hahmann; Boleslo E. Romero; Alexandre Sorokine; E. Lynn Usery; Grant McKenzie (COSIT (Workshops/Posters), 2017)

An Ontological Framework for Characterizing Hydrological Flow Processes. - Shirly Stephen; Torsten Hahmann (COSIT, 2017)

Foundational Ontologies for Units of Measure. - Michael Grüninger; Bahar Aameri; Carmen Chui; Torsten Hahmann; Yi Ru (FOIS, 2018)

On Decomposition Operations in a Theory of Multidimensional Qualitative Space. - Torsten Hahmann (FOIS, 2018)

Using commonsensical cardinal directions to describe bordering objects. - Gregory Kritzman; Torsten Hahmann (SIGSPATIAL/GIS, 2018)

The Landform Reference Ontology (LFRO): A Foundation for Exploring Linguistic and Geospatial Conceptualization of Landforms (Short Paper). - Gaurav Sinha; Samantha T. Arundel; Torsten Hahmann; E. Lynn Usery; Kathleen Stewart; David M. Mark (GIScience, 2018)

Using a hydro-reference ontology to provide improved computer-interpretable semantics for the groundwater markup language (GWML2). - Torsten Hahmann; Shirly Stephen (Int. J. Geogr. Inf. Sci., 2018)

Identifying Bottlenecks in Practical SAT-Based Model Finding for First-Order Logic Ontologies with Datasets. - Shirly Stephen; Torsten Hahmann (AAAI, 2019)

Formal Qualitative Spatial Augmentation of the Simple Feature Access Model. - Shirly Stephen; Torsten Hahmann (COSIT, 2019)

Water features and their parts. - Boyan Brodaric; Torsten Hahmann; Michael Gruninger (Appl. Ontology, 2019)

Geographies of the Holocaust: Experiments in GIS, QSR, and Graph Representations. - Tim Cole; Torsten Hahmann (Int. J. Humanit. Arts Comput., 2019)

Model-Finding for Externally Verifying FOL Ontologies: A Study of Spatial Ontologies. - Shirly Stephen; Torsten Hahmann (FOIS, 2020)

A Methodology for Implementing the Formal Legal-GRL Framework: A Research Preview. - Amin Rabinia; Sepideh Ghanavati; Llio Humphreys; Torsten Hahmann (REFSQ, 2020)

The FOUnt ontologies for quantities, units, and the physical world. - Bahar Aameri; Carmen Chui; Michael Grüninger; Torsten Hahmann; Yi Ru (Appl. Ontology, 2020)

CODI: A multidimensional theory of mereotopology with closure operations. - Torsten Hahmann (Appl. Ontology, 2020)

Automatically Extracting OWL Versions of FOL Ontologies. - Torsten Hahmann; Robert W. Powell II (ISWC, 2021)

An Ontology Design Pattern for Spatial and Temporal Aggregate Data (STAD). - Kingsley Wiafe-Kwakye; Torsten Hahmann; Kate Beard (WOP@ISWC, 2022)

Geo-Situation for Modeling Causality of Geo-Events in Knowledge Graphs. - Shirly Stephen; Wenwen Li 002; Torsten Hahmann (CoRR, 2022)

OPPO: An Ontology for Describing Fine-Grained Data Practices in Privacy Policies of Online Social Networks. - Sanonda Datta Gupta; Torsten Hahmann (JOWO, 2023)

Populating and Refining an Ontology of Cellulose Materials with Terms from Scientific Publications (extended abstract). - Umayer Reza; Torsten Hahmann (JOWO, 2023)

Development of an Ontology-Based Approach to Spatio-Temporal Data Analysis for Forest-Environment Interactions (extended abstract). - Kingsley Wiafe-Kwakye; Torsten Hahmann; Kate Beard (JOWO, 2023)

Tutorials at The Web Conference 2023. - Valeria Fionda; Olaf Hartig; Reyhaneh Abdolazimi; Sihem Amer-Yahia; Hongzhi Chen; Xiao Chen 016; Peng Cui 001; Jeffrey Dalton 001; Xin Luna Dong; Lisette Espín-Noboa; Wenqi Fan; Manuela Fritz; et al. (WWW (Companion Volume), 2023)

An Ontology and Geospatial Knowledge Graph for Reasoning About Cascading Failures (Short Paper). - Torsten Hahmann; David K. Kedrowski (COSIT, 2024)

OnNER: An Ontology for Semantic Representation of Named Entities in Scholarly Publications. - Umayer Reza; Xuelian Zhang; Torsten Hahmann (FOIS, 2024)

OWL Ontologies for the Urban Flooding Open Knowledge Network (UF-OKN). - Torsten Hahmann; David K. Kedrowski (DROPS Artifacts, 2024)

Precomputed Topological Relations for Integrated Geospatial Analysis Across Knowledge Graphs. - Katrina Schweikert; David K. Kedrowski; Shirly Stephen; Torsten Hahmann (GIScience, 2025)