# Units of Measurement Ontology (UO)

> Metrical units for use in conjunction with PATO

- Page: https://library.schematica.io/model/f22c23b005bb432d8653598c9755e969
- Model type: Ontology
- License: CC BY 4.0
- Access type: Free
- Access method: Download
- Model size: Small
- Formats: OWL
- External link: https://bioportal.bioontology.org/ontologies/UO
- Contact: George Gkoutos (g.gkoutos@gmail.com)
- Listed in library: 2025-06-12
- Last updated: 2023-08-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | UO |
| Description | Metrical units for use in conjunction with PATO |
| Format | OWL |
| Categories | Phenotype |
| Groups | OBO Foundry |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 572 |
| Individuals | 275 |
| Properties | 2 |
| Max Depth | 5 |
| Max Child Count | 38 |
| Average Child Count | 2 |
| Classes With One Child | 169 |
| Classes With More Than 25 Children | 1 |
| Classes With No Definition | 166 |

## Projects using UO

- [ISA software suite](https://bioportal.bioontology.org/projects/ISS)
- [Beta Cell Genomics database](https://bioportal.bioontology.org/projects/BCGD)
- [Electrophysiology Ontology](https://bioportal.bioontology.org/projects/EO)
- [Neural ElectroMagnetic Ontologies](https://bioportal.bioontology.org/projects/NEMO)
- [BioAssay Ontology](https://bioportal.bioontology.org/projects/BO)
- [Children's Health Exposure Analysis Resource](https://bioportal.bioontology.org/projects/CHEAR)

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Source: https://library.schematica.io/model/f22c23b005bb432d8653598c9755e969