.cl
7 claimants
4 primary
2 secondary
shared primary (4)
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.
590.1K
total files
138.2K
first seen 2021–2025 (23.4%)
2018
median year (half its files since)
Case variants in archive: .cl (589.5K), .CL (555), .Cl (92), .cL (9) — aggregated above.
Attribution status
This extension is attributed to COOL; Lisp; lisp; OpenCL as primary by 4 authoritative claims.
Claimants (12)
Languages that list
.cl among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| COOL | linguist | primary |
| Lisp | pygments | primary |
| lisp | pygments | primary |
| OpenCL | linguist | primary |
| COOL | pygments | secondary |
| Lisp | linguist | secondary |
| OpenCL | pygments | secondary |
| Proguard | pygments | secondary |
| QMake | pygments | secondary |
| Claire | wikipedia | proposed |
| Lisp | wikipedia | proposed |
| OpenCL | wikipedia | proposed |
Wikidata says… (3)
File formats, image formats, audio codecs and other non-PL
entities that claim
.cl 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 |
|---|---|---|---|---|---|
| IRAF Q3051072 software system for the reduction and analysis of astronomical data | software | — | — | — | Use as new PL ↗ |
| Common Lisp file format Q128774595 file format | file format | — | text/x-common-lisp | — | Use as new PL ↗ |
| VisualProlog file format Q131412989 file format | file format | — | — | — | Use as new PL ↗ |
Disambiguation rules (3)
Linguist heuristics that decide, by content, which language a
.cl file actually is.| Rule | Predicts | Kind | Predicates (truncated) | Measured on SWH |
|---|---|---|---|---|
h/linguist/.cl/0 | Lisp | predicates | [{"kind": "any", "regexes": ["^\\s*\\((?i:defun|in-package|defpackage) "]}] | |
h/linguist/.cl/1 | COOL | predicates | [{"kind": "any", "regexes": ["^class"]}] | |
h/linguist/.cl/2 | OpenCL | predicates | [{"kind": "any", "regexes": ["\\/\\* |\\/\\/ |^\\}"]}] |
SWH-mined examples (0)
No archived examples for .cl in our local mirror yet.