Registry Clinical Metadata Exploration Ontology

CMEO (Clinical Metadata Exploration Ontology) is an ontology for representing and querying study- and variable-level metadata from clinical cohort studies in a consistent, machine-interpretable way. CMEO models the semantics of data elements (variables) and their key metadata needed for cross-cohort discovery and harmonization - such as human-readable labels/definitions, domain/type information (e.g., condition, measurement, medication), permissible categorical values, units, visit/timepoint context, derivation/provenance (e.g., computed variables), and basic descriptive statistics. It is designed to support metadata-driven tasks including cohort cataloguing, feasibility assessment, study retrieval, and identification of compatible variables across studies - without requiring access to patient-level data. CMEO is intended to interoperate with controlled vocabularies and common clinical terminologies by linking data elements and value sets to external concept identifiers (e.g., OMOP concept IDs, SNOMED CT, LOINC, RxNorm/ATC, UCUM) while remaining model-agnostic (i.e., not tied to a single CDM).

Prefix: cmeo
Preferred Prefix: CMEO
Keywords: ontology
License: CC-BY-4.0
Links: Homepage Repository OWL
Publications: CMEO: a metadata-centric ontology for clinical studies exploration and harmonization assessment

Identifier Standards

Pattern for Local Unique Identifiers: Missing LUI pattern
Example Local Unique Identifier: 0000009 Resolve
Example CURIE: CMEO:0000009
Format String for RDF URIs: http://purl.obolibrary.org/obo/CMEO_$1
Example RDF URI: http://purl.obolibrary.org/obo/CMEO_0000009

Contacts

Contact: Komal Gilani 0000-0001-7292-1026 komi786

Mappings to External Registries

Mappings from records in Semantic Farm to external registries comprises the metaregistry. This resource has 2 mappings to external registries with 1 unique external prefixes.

Registry Name	Registry Metaprefix	External Prefix	Curate
OBO Foundry ontology	`obofoundry`	`cmeo`
OLS	`ols`	`cmeo`

Providers

Suggest

A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier 0000009 is used to demonstrate the providers available for Clinical Metadata Exploration Ontology. Some providers may use a different example, which is displayed in the table below. A guide for curating additional providers can be found here.

Provider Name	Provider Code	URI
Clinical Metadata Exploration Ontology (RDF)	`rdf`	http://purl.obolibrary.org/obo/CMEO_0000009
Bioregistry	`bioregistry`	https://bioregistry.io/cmeo:0000009
OBO Foundry ontology	`obofoundry`	http://purl.obolibrary.org/obo/CMEO_0000009
EBI Ontology Lookup Service	`ols`	https://www.ebi.ac.uk/ols/ontologies/cmeo/terms?iri=http://purl.obolibrary.org/obo/CMEO_0000009

This name annotation was originally annotated in OBO Foundry ontology and is redistributed under the CC0-1.0 license.

Get the name:

>>> import bioregistry as br
>>> br.get_name("cmeo")
'Clinical Metadata Exploration Ontology'

Get the license:

>>> import bioregistry as br
>>> br.get_license("cmeo")
'CC-BY-4.0'

Get the homepage:

>>> import bioregistry as br
>>> br.get_homepage("cmeo")
'https://komi786.github.io/cmeo/'

Get the repository:

>>> import bioregistry as br
>>> br.get_repository("cmeo")
'https://github.com/komi786/cmeo'

Get the OWL download link:

>>> import bioregistry as br
>>> br.get_owl_download("cmeo")
'http://purl.obolibrary.org/obo/cmeo.owl'

Get the contact's name:

>>> import bioregistry as br
>>> br.get_contact_name("cmeo")
'Komal Gilani'

Get the contact's email:

>>> import bioregistry as br
>>> br.get_contact_email("cmeo")
'komalsyeda29@gmail.com'

Get the contact's GitHub handle:

>>> import bioregistry as br
>>> br.get_contact_github("cmeo")
'komi786'

Get the contact's ORCiD identifier:

>>> import bioregistry as br
>>> br.get_contact_orcid("cmeo")
'0000-0001-7292-1026'