# Physician Data Query (PDQ)

> Physician Data Query (PDQ) Terminology is part of NCI's comprehensive cancer information...

- Page: https://library.schematica.io/model/5a341e9b06634c049f45adc3ef3e25fe
- Model type: Ontology
- License: UMLS
- Access type: Free
- Access method: Download
- Model size: Mid
- Formats: UMLS
- Domains: Healthcare
- Audiences: Researcher
- External link: https://bioportal.bioontology.org/ontologies/PDQ
- Contact: Volker Englisch (volker@mail.nih.gov)
- Listed in library: 2025-06-12
- Last updated: 2025-09-10

## Description

## Ontology Info

| Field | Value |
|-------|-------|
| Acronyme | PDQ |
| Description | Physician Data Query (PDQ) Terminology is part of NCI's comprehensive cancer information database, which contains expert summaries on a wide range of cancer topics, a listing of some 30,000 cancer clinical trials from around the world, a directory of genetics services professionals, the NCI Dictionary of Cancer Terms, and the NCI Drug Dictionary. |
| Format | UMLS |
| Categories | Health |
| Groups | Unified Medical Language System |

## Metrics

| Metric | Value |
|--------|-------|
| Classes | 7,871 |
| Individuals | 0 |
| Properties | 17 |
| Max Depth | 10 |
| Max Child Count | 89 |
| Average Child Count | 4 |
| Classes With One Child | 110 |
| Classes With More Than 25 Children | 5 |
| Classes With No Definition | 6,615 |

## Projects using PDQ

No projects using PDQ

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Source: https://library.schematica.io/model/5a341e9b06634c049f45adc3ef3e25fe