.udf
1 claimant
0 primary
1 secondary
secondary-only
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.
11.9K
total occurrences
2.0K
since 2019 (17.2%)
2005–2023
years active
Case variants in archive: .udf (10.0K), .UDF (1.8K), .Udf (18) — aggregated above.
Attribution status
This extension is attributed to SQL — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: △ Linguist · secondary ✗ Pygments · no claim ✗ Wikidata · no claim ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.udf among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| SQL | linguist | secondary |
Wikidata says… (7)
File formats, image formats, audio codecs and other non-PL
entities that claim
.udf 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 |
|---|---|---|---|---|---|
| optical disc image Q877050 archive file of an optical disc | disk image format | binary:other | application/vnd.efi.iso; application/x-iso9660-image | wp-only | Use as new PL ↗ |
| Uniqueness Database File Q7886963 file format | file format | — | — | — | Use as new PL ↗ |
| Old Business Planner File Q117276386 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .udf in our local mirror yet.