.dd
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.
41.7K
total occurrences
10.9K
since 2019 (26.2%)
1999–2023
years active
Case variants in archive: .dd (38.1K), .DD (3.6K), .Dd (1) — aggregated above.
Attribution status
This extension is attributed to D as primary by 1 authoritative claim.
Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim ✓ Wikidata · Q319268 ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.dd among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| D | wikidata | primary |
Wikidata says… (3)
File formats, image formats, audio codecs and other non-PL
entities that claim
.dd 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 |
|---|---|---|---|---|---|
| AccWare Data Dictionary Q105855888 file format | file format | — | — | — | Use as new PL ↗ |
| Disk Doubler compressed data Q105855948 file format | file format | — | application/octet-stream | — | Use as new PL ↗ |
| Doodle! uncompressed image Q28205933 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .dd in our local mirror yet.