Registry International System of Units

Ontology, part of the SI Reference Point, covering measurement units (SI base units and SI units with special names) and prefixes.

Prefix: si.units
Alternative Prefixes: si.unit
Keywords: ontology unit units
License: CC-BY-3.0-IGO
Links: Homepage Repository OWL

Identifier Standards

Pattern for Local Unique Identifiers: Missing LUI pattern
Example Local Unique Identifier: ampere Resolve
Example CURIE: si.units:ampere

Contacts

Contact: Missing Contact
Identifier Space Owner: International Bureau of Weights and Measures
Contributors: submitter Charles Tapley Hoyt 0000-0003-4423-4370 cthoyt

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 ampere is used to demonstrate the providers available for International System of Units. 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
International System of Units	`si.units`	https://si-digital-framework.org/SI/units/ampere
Bioregistry	`bioregistry`	https://bioregistry.io/si.units:ampere

Normalize prefixes. This can be any capitalization or punctuation variant of the synonyms listed below.

>>> import bioregistry as br
>>> br.normalize_prefix("si.unit")
'si.units'

Get all synonyms:

>>> import bioregistry as br
>>> br.get_synonyms("si.units")
{'si.unit'}

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

Get the name:

>>> import bioregistry as br
>>> br.get_name("si.units")
'International System of Units'

Get the license:

>>> import bioregistry as br
>>> br.get_license("si.units")
'CC-BY-3.0-IGO'

Get the homepage:

>>> import bioregistry as br
>>> br.get_homepage("si.units")
'https://si-digital-framework.org/SI/units'

Get the repository:

>>> import bioregistry as br
>>> br.get_repository("si.units")
'https://github.com/TheBIPM/SI_Digital_Framework'

Get the OWL download link:

>>> import bioregistry as br
>>> br.get_owl_download("si.units")
'https://github.com/TheBIPM/SI_Digital_Framework/raw/refs/heads/main/knowledge_graphs/SI_Reference_Point/units.ttl'