---
id: "coden"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["publishing", "science"]
langs: ["common"]
quality: 85
url: "http://registry.apicrafter.io/datatype/coden"
---

# CODEN bibliographic code (`coden`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Six-character code for the title of a periodical or non-serial publication, defined by ASTM E250 and assigned by the International CODEN Service at Chemical Abstracts Service. For periodicals, four letters come from the title, the fifth letter is A to F, and the sixth character is a check character. For non-serial publications such as conference proceedings, the code starts with two digits. CODEN is common in chemistry and other science citations.

- Personal data (PII): no
- Categories: Publishing and print (publishing), Scientific (science)
- Countries: global
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
^(?:[A-Z]{4}[A-F]|\d{2}[A-Z]{3})[A-Z0-9]$
```

## Examples

- `NATUAS` — Nature
- `TEREAU` — Technology Review
- `NARHAD` — Nucleic Acids Research
- `66HYAL` — Conference proceedings (non-serial publication)
- `NATUGS` (invalid example) — The fifth letter of a periodical CODEN is A to F

## Mappings

- wikidata: `P1159`

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/CODEN>
- wikidata: <https://www.wikidata.org/wiki/Property:P1159>

## Quality

Score 85/100. Missing: translation, detector coverage.

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