.rdf
3 claimants
1 primary
2 secondary
unambiguous primary
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.
4.1M
total files
1.3M
first seen 2021–2025 (32.2%)
2019
median year (half its files since)
Case variants in archive: .rdf (4.1M), .RDF (9.0K), .Rdf (5), .RdF (1), .rDF (1), .rdF (1) — aggregated above.
Attribution status
This extension is attributed to foaf as primary by 1 authoritative claim.
Authoritative sources: △ Linguist · secondary ✗ Pygments · no claim ✓ Wikidata · Q1389366 ✗ Wikipedia · no claim
Claimants (3)
Languages that list
.rdf among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| foaf | wikidata | primary |
| Web Ontology Language | wikidata | secondary |
| xml | linguist | secondary |
Wikidata says… (6)
File formats, image formats, audio codecs and other non-PL
entities that claim
.rdf 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 |
|---|---|---|---|---|---|
| Web Ontology Language Q826165 family of knowledge representation languages | file format; W3C Recommendation | — | application/owl+xml | — | Use as new PL ↗ |
| FOAF Q1389366 Semantic Web ontology to describe relations between people | ontology | — | — | — | Use as new PL ↗ |
| RDF/XML Q48940 syntax defined by the W3C to express an RDF graph as an XML document | file format; technical standard | data:xml-like | application/rdf+xml | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .rdf in our local mirror yet.