GET /ontologies/{ontologyId}/properties

ac.uk:embl-ebi-ontology-lookup-service-ols-api

Summary: List properties in an ontology
Operation ID: getOntologyProperties
Auth: unknown
Description

Returns a paginated list of all properties in the specified ontology

Parameters (4)

lang (string, query, optional, default: en)

Language code

ontologyId (string, path, required)

Ontology ID (e.g., 'go', 'efo', 'mondo')

page (integer, query, optional, default: 0)

Page number (0-indexed)

size (integer, query, optional, default: 20)

Page size

Examples (3)

TitleTypeURLAction
List properties in Gene Ontology curl https://www.ebi.ac.uk/ols4/api/ontologies/go/properties
List properties with pagination curl https://www.ebi.ac.uk/ols4/api/ontologies/go/properties?page=0&size=10
List properties in Experimental Factor Ontology with larger page size curl https://www.ebi.ac.uk/ols4/api/ontologies/efo/properties?page=0&size=50

Probe History

Latency

Status Codes

TimeStatusLatencySize
2026-03-23 10:44:37.974819 200 210ms
2026-03-23 10:29:12.539281 200 178ms
2026-03-23 09:50:56.723324 200 497ms

Response Changes

WhenOldNew
2026-03-23 10:29:12.539281 5a462d888442 701bbf75251a
2026-03-23 10:44:37.974819 701bbf75251a 21966ff98134