.nl
2 claimants
2 primary
0 secondary
shared primary (2)
SWH popularity
Distinct files in the full Software Heritage archive (2026-06-04 export), dated by first appearance, following Desmazières, Di Cosmo, Lorentz (MSR 2025). Case-aggregated. citation.
83.0K
total files
21.7K
first seen 2021–2025 (26.1%)
2018
median year (half its files since)
Case variants in archive: .nl (82.6K), .NL (341), .Nl (9) — aggregated above.
Attribution status
This extension is attributed to newLISP; nl as primary by 2 authoritative claims.
Authoritative sources: ✓ Linguist △ Pygments · secondary ✗ Wikidata · no claim ✗ Wikipedia · no claim
Claimants (4)
Languages that list
.nl among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| newLISP | linguist | primary |
| nl | linguist | primary |
| newLISP | pygments | secondary |
| nl | pygments | secondary |
Wikidata says… (3)
File formats, image formats, audio codecs and other non-PL
entities that claim
.nl on Wikidata
(property P1195) or in the Wikipedia infobox.
Source: data/derived/external_extension_index.csv.
Click Use as new PL on any row to open the
Add-PL form pre-filled with that entry's name, Wikipedia/Wikidata
URL, and this extension — one submission creates the PL + claim.
| Format | Class (Wikidata P31) | Suggested label | MIME | Notes | Action |
|---|---|---|---|---|---|
| nl Q12071934 file format for presenting and archiving mathematical programming problems | file format | — | — | — | Use as new PL ↗ |
| newLISP source code file Q130372707 file format | file format | — | application/x-newlisp; text/x-newlisp | — | Use as new PL ↗ |
| Student Writing Center Newsletter Q100244109 file format | file format | — | — | — | Use as new PL ↗ |
Disambiguation rules (2)
Linguist heuristics that decide, by content, which language a
.nl file actually is.| Rule | Predicts | Kind | Predicates (truncated) | Measured on SWH |
|---|---|---|---|---|
h/linguist/.nl/0 | nl | predicates | [{"kind": "any", "regexes": ["^(b|g)[0-9]+ "]}] | |
h/linguist/.nl/1 | newLISP | default | [] |
SWH-mined examples (0)
No archived examples for .nl in our local mirror yet.