.mFrom 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.
Case variants in archive: .m (46.5M), .M (26.1K) — aggregated above.
This extension is attributed to GNU Octave; GNU Octave; m4; Mercury; Mercury; Monkey C; Objective-C; Objective-C; Objective-C; octave; octave; Win32 Message File; Wolfram Language as primary by 13 authoritative claims.
.m among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| GNU Octave | pygments | primary |
| GNU Octave | wikidata | primary |
| m4 | pygments | primary |
| Mercury | linguist | primary |
| Mercury | wikidata | primary |
| Monkey C | pygments | primary |
| Objective-C | linguist | primary |
| Objective-C | pygments | primary |
| Objective-C | wikidata | primary |
| octave | pygments | primary |
| octave | wikidata | primary |
| Win32 Message File | pygments | primary |
| Wolfram Language | wikidata | primary |
| CML | linguist | secondary |
| GNU Octave | linguist | secondary |
| Limbo | linguist | secondary |
| MUF | linguist | secondary |
| Wolfram Language | linguist | secondary |
| A+ (programming language) | wikipedia | proposed |
.m 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 |
|---|---|---|---|---|---|
| Desktop Color Separation Q28205883 file format | file format | — | — | — | Use as new PL ↗ |
| Maple Common Binary (Amiga) Q105861793 file format | file format | — | application/octet-stream | — | Use as new PL ↗ |
| Mason file format Q130280361 file format | file format | — | application/x-mason | — | Use as new PL ↗ |
.m file actually is.| Rule | Predicts | Kind | Predicates (truncated) |
|---|---|---|---|
h/linguist/.m/0 | Objective-C | predicates | [{"kind": "any", "regexes": ["^\\s*(@(interface|class|protocol|property|end|synchronised|selector|implementation)\\b|#import\\s+.+\\.h[\">])"]}] |
h/linguist/.m/1 | Mercury | predicates | [{"kind": "any", "regexes": [":- module"]}] |
h/linguist/.m/2 | MUF | predicates | [{"kind": "any", "regexes": ["^: "]}] |
h/linguist/.m/3 | CML | predicates | [{"kind": "any", "regexes": ["^\\s*;"]}] |
h/linguist/.m/4 | Wolfram Language | predicates | [{"kind": "any", "regexes": ["\\(\\*"]}, {"kind": "any", "regexes": ["\\*\\)$"]}] |
h/linguist/.m/5 | GNU Octave | predicates | [{"kind": "any", "regexes": ["^\\s*%"]}] |
h/linguist/.m/6 | Limbo | predicates | [{"kind": "any", "regexes": ["^\\w+\\s*:\\s*module\\s*\\{"]}] |
pl/new:xlib-and-x-protocol-test-suite (medium) amended 2026-06-12