.cm
1 claimant
1 primary
0 secondary
unambiguous primary
SWH popularity
From the SWH-MSR-ARV dataset (Desmazières, Di Cosmo, Lorentz, MSR 2025; file nb_extensions_alphanum.csv) — one row per (ext, year) in the full SWH archive. Case-aggregated. citation.
84.4K
total occurrences
21.1K
since 2019 (25.0%)
1986–2023
years active
Case variants in archive: .cm (76.0K), .CM (8.4K), .Cm (26), .cM (3) — aggregated above.
Attribution status
This extension is attributed to Cameleon (programming language) as primary by 1 authoritative claim.
Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim ✓ Wikidata · Q16632358 ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.cm among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Cameleon (programming language) | wikidata | primary |
Wikidata says… (2)
File formats, image formats, audio codecs and other non-PL
entities that claim
.cm 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 |
|---|---|---|---|---|---|
| Puzzle image Q28207158 file format | file format | — | — | — | Use as new PL ↗ |
| The Chessmaster 2000 saved game Q105849813 file format | file format | — | application/octet-stream | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .cm in our local mirror yet.