# Anatomical Entity Ontology (AEO)

> AEO is an ontology of anatomical structures that expands CARO, the Common Anatomy Reference...

- Page: https://library.schematica.io/model/5b84b8bd752145028b5fd09d5941e9f2
- Model type: Ontology
- License: CC BY 4.0
- Access type: Academic
- Access method: Download
- Model size: Small
- Formats: OWL
- Domains: Healthcare
- Audiences: Researcher
- External link: https://bioportal.bioontology.org/ontologies/AEO
- Contact: Jonathan Bard (J.Bard@ed.ac.uk)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | AEO |
| Description | AEO is an ontology of anatomical structures that expands CARO, the Common Anatomy Reference Ontology, to about 200 classes using the is_a relationship; it thus provides a detailed type classification for tissues. The new classes were chosen for their use in categorizing the major vertebrate and invertebrate anatomy ontologies at a granularity adequate for tissues of a single cell type. The ontology should be useful in increasing the amount of knowledge in anatomy ontologies, facilitating annotation and enabling interoperability across anatomy ontologies |
| Format | OWL |
| Categories | Anatomy |
| Groups | OBO Foundry |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 250 |
| Individuals | 0 |
| Properties | 11 |
| Max Depth | 11 |
| Max Child Count | 13 |
| Average Child Count | 2 |
| Classes With One Child | 31 |
| Classes With More Than 25 Children | 0 |
| Classes With No Definition | 15 |

## Projects using AEO

- [Safety and Toxicity of Excipients for Paediatrics (STEP) Database](https://bioportal.bioontology.org/projects/STEP+database)
- [Neural ElectroMagnetic Ontologies](https://bioportal.bioontology.org/projects/NEMO)

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Source: https://library.schematica.io/model/5b84b8bd752145028b5fd09d5941e9f2