.dtd
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.
965.2K
total occurrences
107.8K
since 2019 (11.2%)
1970–2023
years active
Case variants in archive: .dtd (964.4K), .DTD (787), .Dtd (4), .DTd (1) — aggregated above.
Attribution status
This extension is attributed to dtd as primary by 1 authoritative claim.
Authoritative sources: ✗ Linguist · no claim ✓ Pygments ✗ Wikidata · no claim ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.dtd among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| dtd | pygments | primary |
Wikidata says… (2)
File formats, image formats, audio codecs and other non-PL
entities that claim
.dtd 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 |
|---|---|---|---|---|---|
| Document Type Definition Q212327 set of markup declarations that define a document type for an SGML-family markup language | file format; XML schema | — | application/xml-dtd | — | Use as new PL ↗ |
| TechSoft 2D Design drawing Q105855735 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .dtd in our local mirror yet.