The Reagent Ontology (ReO) adheres to OBO Foundry principles ( to model the domain of biomedical research reagents, considered broadly to include materials applied “chemically” in scientific techniques to facilitate generation of data and research materials. ReO is a modular ontology that re-uses existing ontologies to facilitate cross-domain interoperability. It consists of reagents and their properties, linking diverse biological and experimental entities to which they are related. ReO supports community use cases by providing a flexible, extensible, and deeply integrated framework that can be adapted and extended with more specific modeling to meet application needs.


From James O.: It was an ontology for "reagents" developed by @Matthew Brush. Since OBI was interested in reagents, Matt developed it in coordination with OBI and had plans to submit it to OBO. I believe that REO was once included in Ontobee, and OBI even started using some REO terms. But REO was never submitted to OBO. I believe it was abandoned.

Homepage Repository OWL
Matthew Brush   mbrush
Pattern for Local Unique Identifiers

Local identifiers in Reagent Ontology should match this regular expression:

Example Local Unique Identifier
Pattern for CURIES

Compact URIs (CURIEs) constructed from Reagent Ontology should match this regular expression:

Example CURIE
Metaregistry Reagent Ontology

The metaregistry provides mappings between the Bioregistry and other registries. There are 1 mappings to external registries for reo.

Registry Name Metaprefix External Prefix
OntoBee ontobee REO