Registry Chromosome Ontology

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The Chromosome Ontology is an automatically derived ontology of chromosomes and chromosome parts.

Prefix: chr
Preferred Prefix: CHR
Keywords: ontology
Version: 2025-10-15
License: BSD-3-Clause
Links: Homepage Repository OBO OWL OBO JSON Request Discussion

Identifier Standards

Pattern for Local Unique Identifiers: Missing LUI pattern
Example Local Unique Identifier: 10090-chr10qC Resolve
Example CURIE: CHR:10090-chr10qC

Contacts

Contact: Chris Mungall 0000-0002-6601-2165 cmungall
Contributor: creator Harry Caufield 0000-0001-5705-7831 caufieldjh
Reviewer: Charles Tapley Hoyt 0000-0003-4423-4370 cthoyt

Mappings to External Registries

Mappings from records in Semantic Farm to external registries comprises the metaregistry. This resource has 4 mappings to external registries with 1 unique external prefixes.

Registry Name	Registry Metaprefix	External Prefix
AberOWL	`aberowl`	`CHR`
BioContext	`biocontext`	`CHR`
BioPortal	`bioportal`	`CHR`
OLS	`ols`	`chr`

Providers

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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 10090-chr10qC is used to demonstrate the providers available for Chromosome 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
Chromosome Ontology	`chr`	http://purl.obolibrary.org/obo/CHR_10090-chr10qC
Bioregistry	`bioregistry`	https://bioregistry.io/chr:10090-chr10qC

Get the version:

>>> import bioregistry as br
>>> br.get_version("chr")
'2025-10-15'

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

Get the name:

>>> import bioregistry as br
>>> br.get_name("chr")
'Chromosome Ontology'

Get the license:

>>> import bioregistry as br
>>> br.get_license("chr")
'BSD-3-Clause'

Get the homepage:

>>> import bioregistry as br
>>> br.get_homepage("chr")
'https://github.com/monarch-initiative/monochrom'

Get the repository:

>>> import bioregistry as br
>>> br.get_repository("chr")
'https://github.com/monarch-initiative/monochrom'

Get the OBO download link:

>>> import bioregistry as br
>>> br.get_obo_download("chr")
'https://raw.githubusercontent.com/monarch-initiative/monochrom/refs/heads/master/chr.obo'

Get the OWL download link:

>>> import bioregistry as br
>>> br.get_owl_download("chr")
'https://raw.githubusercontent.com/monarch-initiative/monochrom/refs/heads/master/chr.owl'

Get the JSON download link:

>>> import bioregistry as br
>>> br.get_json_download("chr")
'https://raw.githubusercontent.com/monarch-initiative/monochrom/refs/heads/master/chr.json'

Get the contact's name:

>>> import bioregistry as br
>>> br.get_contact_name("chr")
'Chris Mungall'

Get the contact's email:

>>> import bioregistry as br
>>> br.get_contact_email("chr")
'cjmungall@lbl.gov'

Get the contact's GitHub handle:

>>> import bioregistry as br
>>> br.get_contact_github("chr")
'cmungall'

Get the contact's ORCiD identifier:

>>> import bioregistry as br
>>> br.get_contact_orcid("chr")
'0000-0002-6601-2165'