Semantic Farm - Ontologies4Chem 2026

Collections Ontologies4Chem 2026

The 5^th Ontologies4Chem Workshop took place between November 2-4^th, 2026 in Limburg an der Lahn at the Dom Limburg Hotel. This collection covers records for ontologies, controlled vocabularies, and other relevant semantic spaces that were presented directly, used by work that was presented, or otherwise discussed at the workshop.

The contributors list reflects the union of the presenters of the talks, maintainers of the ontologies/resources listed who were in attendance, and other contributions to the construction of the conference/list. Note: this collection isn't meant to be a complete summary of the Ontologies4Chem Workshop, but rather it's meant to contextualize the discussion topics from different parts of the workshop based on the resources they were about.

Identifier: 0000047
Maintainers: Charles Tapley Hoyt 0000-0003-4423-4370 cthoyt
Contributors: Shashank S. Harivyasi 0000-0002-2174-5226 harivyasi; Evan E Bolton 0000-0002-5959-6190 boltonee; Mario Wolter 0000-0001-6948-6801 MarioWolter; Aileen Day 0000-0003-2397-1996 a-e-day; Laura Fadler 0009-0003-3065-7812 laurafadler; Philipp von Hartrott 0000-0003-4971-3645 webhart; Giorgio Ubbiali 0000-0001-7872-1770 gioUbbiali; Robin Stöhrmann 0009-0003-3662-0906 CodoRob; Fathoni A. Musyaffa 0000-0003-4846-8051 fathoni; Darren Rhodes 0009-0008-1206-7620 Darren01; Hendrik Borgelt 0000-0001-5886-7860 HendrikBorgelt; Noura Rayya 0009-0001-5998-5030 NRayya; Egon Willighagen 0000-0001-7542-0286 egonw; Noel M. O'Boyle 0000-0003-4879-2003 baoilleach; Jerven Bolleman 0000-0002-7449-1266 JervenBolleman; Alan Bridge 0000-0003-2148-9135 alanbridge; Alexander Behr 0000-0003-4620-8248 AleSteB; Philip Strömert 0000-0002-1595-3213 StroemPhi; Jerven Bolleman 0000-0002-7449-1266 JervenBolleman; Carles Bo 0000-0001-9581-2922 carlesbo; Leah McEwen 0000-0003-2968-1674 LeahRaeMcEwen; David Linke 0000-0002-5898-1820 dalito; Carsten Kettner 0000-0002-8697-6842 Peacock68; Gabriela Dias-da-Silva 0000-0003-3763-1917 gabisdias
Organizations: Beilstein Institute; PSDI; NFDI4Chem; NFDI4Cat
Size: 28
Downloads: External Mappings AberOWL AgroPortal BARTOC BioContext BiodivPortal Biolink BioPortal Bioregistry Cellosaurus CHEMINF CropOCT EcoPortal EDAM FAIRsharing GO HL7 Integbio LOC LOV Identifiers.org namespace N2T NCBI OBO Foundry ontology OLS OntoBee Pathguide Prefix.cc Prefix Commons re3data RRID TIB-TS TogoID Ontology UniProt Wikidata (E) Wikidata Zazuko OLS Configurations

Prefix	Name	License
`asmo`	Atomistic Simulation Methods Ontology Mentioned during the computational chemistry hackathon as a potential ontology for reuse or extension computational chemistry	CC-BY-4.0
`bioregistry`	Bioregistry The Semantic Farm/Bioregistry was a recurring topic of conversation on the indexing of ontologies such that they are easier to find and reuse. First Party	CC0-1.0
`chebi`	Chemical Entities of Biological Interest ChEBI was the primary topic of the morning session of Day 3 entitled Chemical Entities – Classification and Design Patterns. Noel O'Boyle presented general updates, Simon Flügel presented Rule-based ChEBI extension, Charlotte Tumescheit presented Explainability of chemical language models, and Miranda Carlsson presented ChEBI-N – An Updated Ontology-Based Chemical Enrichment Analysis Tool. presented	CC-BY-4.0
`cheminf`	Chemical Information Ontology CHEMINF was mentioned in several contexs, including in the computational chemistry modeling hackathon and in Philip Strömert's presentation Design Patterns for Chemical Composition of Substances and Materials in the context of ChemDCAT-AP. computational chemistry	CC0-1.0
`chmo`	Chemical Methods Ontology Noura Rayya presented NFDI4Chem’s Ontology Curation Status Updates: CHMO, RXNO & MOP on Day 1 of the workshop which outlined the maturing ODK-ization of CHMO. presented	CC-BY-4.0
`climoo.picco`	ClimOO - Plastics Interconnecting with Climate Change Ontology presented
`climoo.piccomela`	ClimOO - Plastics Interconnecting with Climate Change Ontology - mela module presented
`climoo.plastico`	ClimOO - Plastic Ontology PlasticO was presented by Giorgio A. Ubbiali on Day 2 as part of a suite of ontologies describing plastics, their lifecycles, debris, their environment and ecological impacts, and effects on climate change (slides). presented	CC-BY-4.0
`climoo.sdc2`	ClimOO - Sustainable Development and Climate Ontology presented
`emmo`	Elementary Multiperspective Material Ontology Mentioned during the computational chemistry hackathon as a potential ontology for reuse or extension. EMMO is an upper-level ontology framework often used in the natural sciences and engineering (but not so much in the life sciences, which typically use BFO) computational chemistry	CC-BY-4.0
`goldbook`	IUPAC Gold Book Compendium of Chemical Terminology Leah McEwen and Stuart Chalk hosted a hackathon for the serialization of the IUPAC Goldbook to SKOS presented	CC-BY-SA-4.0
`mlips`	An Ontology for Machine Learning Interatomic Potentials Mentioned during the computational chemistry hackathon as a potential ontology for reuse or extension computational chemistry	CC-BY-4.0
`molsim`	Molecular Simulation Ontology Fathoni Musyaffa presented MOLSIM: an OBO-aligned ontology for describing molecular simulation data on Day 1 computational chemistry	CC-BY-4.0
`mop`	Molecular Process Ontology Noura Rayya presented NFDI4Chem’s Ontology Curation Status Updates: CHMO, RXNO & MOP on Day 1 of the workshop which outlined the plan for the ODK-ization of MOP. presented	CC-BY-4.0
`ontmm`	Molecular Modelling Project Ontology Darren Rhodes has been constructing the Molecular Modelling Project Ontology from a chemist's perspective and joined the workshop to share the competency questions that were encoded in this application ontology. computational chemistry	MIT
`ontoiochem`	OntoIochem Core Ontology Presented by Gabi Dias during Day 1 of the computational chemistry ontology hackathon. computational chemistry presented
`pmdco`	Platform Material Digital Core Ontology Philipp von Hartrott presented Description of compositions of metallic materials using PMDco on Day 3. presented	CC-BY-4.0
`psdi.voc`	PSDI vocabulary Samantha Pearman-Kanza and Aileen Day presented the Physical Science Data Infrastructure (PSDI), an organization in the UK with similar goals as the NFDI, on Day 1. Their presentation included the metadata strategy and controlled vocabularies under development (slides). presented
`pubchem.vocabulary`	PubChem Vocabulary Evan Bolton presented PubChem & ChemRef on Day 3 presented
`qudt`	Quantities, Units, Dimensions, and Types Ontology computational chemistry	CC-BY-4.0
`rhea`	Rhea reaction Jerven Bolleman and Alex Sommer-Behr lead the discussion following Day 2's long talk on Alexei Lapkin and Laura Fadler's high level context ontology proposal, in which we discussed the needs for modeling reactions, experiments, instruments, and related concepts. Rhea was a natural suggestion from Jerven's work at SIB as an existing resource to take inspiration from. presented	CC-BY-4.0
`rxno`	Name Reaction Ontology Noura Rayya presented NFDI4Chem’s Ontology Curation Status Updates: CHMO, RXNO & MOP on Day 1 of the workshop which outlined the plan for the ODK-ization of RXNO. presented	CC-BY-4.0
`sre.cpo`	Chemical Process Ontology Laura Fadler and Alexei Lapkin presented A high-level ‘Context’ ontology - providing more context for reactions which showcased two ontologies - the Chemical Process Ontology (CPO) was the domain-specific application of their high-level ontology (HLO). presented
`sre.hlo`	Higher Level Ontology Laura Fadler and Alexei Lapkin presented A high-level ‘Context’ ontology - providing more context for reactions which showcased two ontologies - the Chemical Process Ontology (CPO) was the domain-specific application of their high-level ontology (HLO). presented
`sssom`	Simple Standard for Sharing Ontological Mappings SSSOM was presented by Charles Tapley Hoyt on Day 1 (slides). First Party presented	BSD-3-Clause
`tib.mdo`	Materials Design Ontology Mentioned during the computational chemistry hackathon as a potential ontology for reuse or extension computational chemistry	MIT
`voc4cat`	A vocabulary for the catalysis disciplines David Linke presented Terms are the easy part: Editorial rules, tooling and review in Voc4Cat on Day 1. First Party presented	CC0-1.0
`worldavatar.compchem`	WorldAvatar computational chemistry ontology Mentioned during the computational chemistry hackathon as a potential ontology for reuse or extension computational chemistry	MIT

Indirect Dependencies

Prefix	Name
`ro`	Relation Ontology
`bfo`	Basic Formal Ontology
`xsd`	XML Schema Definition
`xml`	Extensible Markup Language
`owl`	Web Ontology Language
`rdfs`	RDF Schema
`rdf`	Resource Description Framework
`foaf`	Friend of a Friend
`dcterms`	Dublin Core Metadata Initiative Terms
`iao`	Information Artifact Ontology
`iochem`	ioChem-BD Schema
`gainesville.core`	Gainesville Core Ontology