---
id: "udkindex"
kind: "datatype"
status: "stable"
is_pii: true
categories: ["common"]
langs: ["common"]
quality: 75
url: "http://registry.apicrafter.io/datatype/udkindex"
---

# Universal Decimal Classification (UDC) (`udkindex`)

The Universal Decimal Classification (UDC) is a bibliographic and library classification representing the systematic arrangement of all branches of human knowledge organized as a coherent system in which knowledge fields are related and inter-linked.

- Personal data (PII): yes
- Categories: Common (common)
- Countries: global
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
\d{1,3}(\.\d{1,3})*
```

## Examples

- `316.7` — sociology of culture
- `316.774:32` — The Party Journalist

## Mappings

- bioregistry: `udc`
- wikidata: `P1190`

## Translations

- ru: Индекс УДК (универсальная десятичная классификация): Универсальная десятичная классификация — система классификации информации, широко используется во всём мире для систематизации произведений науки, литературы и искусства, периодической печати, различных видов документов и организации картотек.

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/Universal_Decimal_Classification>
- wikidata: <https://www.wikidata.org/wiki/Property:P1190>

## Quality

Score 75/100. Missing: anchored regexp, negative example, detector coverage.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/udkindex.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/science/udkindex.yaml>