Earth Metabolome Initiative Ontology

The EMI (Earth Metabolome Initiative) ontology is a knowledge representation framework designed to describe the metabolic content of all known species. Where applicable, it reuses and repurposes several general-purpose and domain-specific ontologies including SOSA (Sensor, Observation, Sample, and Actuator), SKOS (Simple Knowledge Organization System), RO (Relation Ontology), QUDT (Quantities, Units, Dimensions, and Types), and ENPKG. The EMI ontology contains over 100 new concepts and relations to describe chemical compounds, organism traits and interactions, geolocation, and sample metadata.