# National Drug File – Reference Terminology (NDF-RT)

> Logically inferred version in OWL of the National Drug File – Reference Terminology (NDF-RT)....

- Page: https://library.schematica.io/model/10e10f6652554fc2bdf2d3ac6537853c
- Model type: Ontology
- License: UMLS
- Access type: Free
- Access method: Download
- Model size: Huge
- Formats: OWL
- Domains: Healthcare
- Audiences: Researcher
- External link: https://bioportal.bioontology.org/ontologies/NDF-RT
- Contact: Steven H. Brown;MD (steven.brown@va.gov)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | NDF-RT |
| Description | Logically inferred version in OWL of the National Drug File – Reference Terminology (NDF-RT). NDF-RT is the terminology used by FDA and the FedMed collaboration to code these essential pharmacologic properties of medications: Mechanism of Action, Physiologic Effect, Structural Class.  |
| Format | OWL |
| Categories |  |
| Groups |  |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 46,046 |
| Individuals | 24,830 |
| Properties | 55 |
| Max Depth | 13 |
| Max Child Count | 5,507 |
| Average Child Count | 5 |
| Classes With One Child | 4,454 |
| Classes With More Than 25 Children | 326 |
| Classes With No Definition | 46,046 |

## Projects using NDF-RT

No projects using NDF-RT

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Source: https://library.schematica.io/model/10e10f6652554fc2bdf2d3ac6537853c