.dat

2 claimants 2 primary 0 secondary shared primary (2)

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.

41.2M
total occurrences
14.3M
since 2019 (34.7%)
1969–2023
years active

Case variants in archive: .dat (40.4M), .DAT (673.4K), .Dat (74.9K), .dAT (4), .dAt (3), .DaT (3), .daT (2), .DAt (2) — aggregated above.

Attribution status

This extension is attributed to AMPL; Dat as primary by 2 authoritative claims.

Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim ✓ Wikidata · Q295250 ✗ Wikipedia · no claim

Disagree or have a correction? Open a labelling issue.

Claimants (2)

Languages that list .dat among their extensions. Strength reflects whether the upstream source treated it as their primary extension.
LanguageSourceStrength
AMPLwikidataprimary
Datwikidataprimary

Wikidata says… (104)

File formats, image formats, audio codecs and other non-PL entities that claim .dat 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.
Right entry isn't listed? Add manually ↗
FormatClass (Wikidata P31)Suggested labelMIMENotesAction
DAT Q32097740
file format
file formatUse as new PL ↗
Mork Q6912474
file format
file formatUse as new PL ↗
Transport Neutral Encapsulation Format Q1601331
proprietary email attachment format
file formatapplication/vnd.ms-tnefUse as new PL ↗

SWH-mined examples (2)

Real archived programs with this extension, byte-verified against the SWH archive. Useful for deciding what this extension actually is when the attribution is uncertain.
fo_pp_d0meson_5TeV_y0p5.dat · 130472 B · seen 473× in SWH
predicted: unclassified via unknown-ext
swh:1:cnt:2eae443389376c80d9c2dda456e69ea4cee18a9c;origin=https://github.com/ginnocenCMS/DntupleRunII;anchor=swh:1:rev:55f9a3ef267b284d5eb67a3fc6735e9c92bffeb9;path=/CrossSection/fo_pp_d0meson_5TeV_y0p5.dat
Open in SWH · Raw bytes
ms_DATE_en.dat · 1782 B · seen 463× in SWH
predicted: unclassified via unknown-ext
swh:1:cnt:7a211bf472e5add8a9bf47feab013cf21cb4e413;origin=https://github.com/teamq-ec/commsy-vagrant;anchor=swh:1:rev:4d33f76380ee3146ab7f65c7791b8ea53e33b3ad;path=/legacy/etc/messages/ms_DATE_en.dat
Open in SWH · Raw bytes
Request more SWH-mined examples
If the examples above don't disambiguate what .dat is, request a fresh mining run.
(or open the pre-filled issue directly)