.moo
3 claimants
3 primary
0 secondary
shared primary (3)
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.
8.6K
total files
4.3K
first seen 2021–2025 (50.6%)
2021
median year (half its files since)
Case variants in archive: .moo (8.5K), .MOO (71), .Moo (8), .moO (1) — aggregated above.
Attribution status
This extension is attributed to Mercury; MOO; Moocode as primary by 4 authoritative claims.
Claimants (5)
Languages that list
.moo among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Mercury | pygments | primary |
| MOO | pygments | primary |
| Moocode | linguist | primary |
| Moocode | pygments | primary |
| Mercury | linguist | secondary |
Wikidata says… (2)
File formats, image formats, audio codecs and other non-PL
entities that claim
.moo 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 |
|---|---|---|---|---|---|
| MOOCode file format Q130357389 file format | file format | — | text/x-moocode | — | Use as new PL ↗ |
| Wild Photo Effects file Q122428478 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .moo in our local mirror yet.