# National Drug File - Reference Terminology (NDFRT)

> National Drug File - Reference Terminology Public Inferred Edition, 2008_03_11

- Page: https://library.schematica.io/model/bdff788f89834010a9dd4513204245e9
- Model type: Ontology
- License: UMLS
- Access type: Free
- Access method: Download
- Model size: Huge
- Formats: UMLS
- Domains: Healthcare
- Audiences: Researcher
- External link: https://bioportal.bioontology.org/ontologies/NDFRT
- Contact: Michael J. Lincoln MD (michael.lincoln@va.gov)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | NDFRT |
| Description | National Drug File - Reference Terminology Public Inferred Edition, 2008_03_11 |
| Format | UMLS |
| Categories | Health |
| Groups | Unified Medical Language System |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 36,202 |
| Individuals | 0 |
| Properties | 53 |
| Max Depth | 11 |
| Max Child Count | 953 |
| Average Child Count | 3 |
| Classes With One Child | 4,051 |
| Classes With More Than 25 Children | 87 |
| Classes With No Definition | 36,171 |

## Projects using NDFRT

- [Semantic Indexing of French Biomedical Data Resources](https://bioportal.bioontology.org/projects/SIFR)
- [PubChem](https://bioportal.bioontology.org/projects/PubChem)

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Source: https://library.schematica.io/model/bdff788f89834010a9dd4513204245e9