.h4
1 claimant
0 primary
1 secondary
secondary-only
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.
386
total files
116
first seen 2021–2025 (30.1%)
2019
median year (half its files since)
Case variants in archive: .h4 (362), .H4 (24) — aggregated above.
Attribution status
This extension is attributed to hdf — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim △ Wikidata · secondary ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.h4 among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| hdf | wikidata | secondary |
Wikidata says… (3)
File formats, image formats, audio codecs and other non-PL
entities that claim
.h4 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 |
|---|---|---|---|---|---|
| Hierarchical Data Format Q1069215 Family of file formats | file format family | — | — | — | Use as new PL ↗ |
| HDF4 Q63065200 General purpose data model, library, and file format for storing scientific and engineering data | free software; software library | — | application/vnd.hdfgroup.hdf4 | — | Use as new PL ↗ |
| NeXus HDF4 data format Q105867043 file format | file format | — | application/octet-stream | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .h4 in our local mirror yet.