Registry International System of Units Reference Point

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

Prefix: si
Keywords: ontology unit units
License: CC-BY-3.0-IGO
Links: Homepage Repository OWL Part of si

Identifier Standards

Pattern for Local Unique Identifiers: Missing LUI pattern
Example Local Unique Identifier: MeasurementUnit Resolve
Example CURIE: si:MeasurementUnit

Contacts

Contact: Cristhian Paredes 0000-0001-7049-9597 Crparedes
Identifier Space Owner: International Bureau of Weights and Measures
Contributors: creator Charles Tapley Hoyt 0000-0003-4423-4370 cthoyt; contributor Giacomo Lanza 0000-0002-2239-3955 Zack-83

Ontology

A summary of the relations in the Semantic Farm schema can be found here.

In Collection (1): NFDI4Ing Collection

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 MeasurementUnit is used to demonstrate the providers available for International System of Units Reference Point. 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 Reference Point	`si`	http://si-digital-framework.org/SI#MeasurementUnit
Bioregistry	`bioregistry`	https://bioregistry.io/si:MeasurementUnit

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")
'International System of Units Reference Point'

Get the license:

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

Get the homepage:

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

Get the repository:

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

Get the OWL download link:

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

Get the contact's name:

>>> import bioregistry as br
>>> br.get_contact_name("si")
'Cristhian Paredes'

Get the contact's email:

>>> import bioregistry as br
>>> br.get_contact_email("si")
'cristhian.paredes@bipm.org'

Get the contact's GitHub handle:

>>> import bioregistry as br
>>> br.get_contact_github("si")
'Crparedes'

Get the contact's ORCiD identifier:

>>> import bioregistry as br
>>> br.get_contact_orcid("si")
'0000-0001-7049-9597'