---
id: "issn_l"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["publishing", "objectids"]
langs: ["common"]
quality: 80
url: "http://registry.apicrafter.io/datatype/issn_l"
---

# Linking ISSN (ISSN-L) (`issn_l`)

> **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.

ISSN chosen to group all media versions (print, online) of one continuing resource. It has the format of an ISSN: two groups of four characters, the last of which is a check digit or X.

- Parent datatype: `issn`
- Personal data (PII): no
- Categories: Publishing and print (publishing), Objects identifiers (objectids)
- Countries: global
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
^[0-9]{4}\-[0-9]{3}[0-9X]$
```

## Examples

- `0264-2875` — Dance Research
- `1748-7188` — Algorithms for Molecular Biology

## Mappings

- stdnum: `issn`
- wikidata: `P7363`

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/ISSN#Linking_ISSN>
- doc: <https://www.issn.org/understanding-the-issn/assignment-rules/the-issn-l-for-publications-on-multiple-media/>
- wikidata: <https://www.wikidata.org/wiki/Property:P7363>

## Quality

Score 80/100. Missing: negative example, translation, detector coverage.

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