.rd
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.
3.1M
first seen 2021–2025 (34.7%)
2019
median year (half its files since)
Case variants in archive: .Rd (8.8M), .rd (77.3K), .RD (1.5K), .rD (2) — aggregated above.
Attribution status
This extension is attributed to R — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: △ Linguist · secondary ✗ Pygments · no claim ✗ Wikidata · no claim ✗ Wikipedia · no claim
Disagree or have a correction? Open a labelling issue.
Claimants (1)
Languages that list .rd among their extensions. Strength reflects whether the upstream source treated it as their primary extension.
| Language | Source | Strength |
| R | linguist | secondary |
Wikidata says… (3)
File formats, image formats, audio codecs and other non-PL
entities that claim .rd 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.
SWH-mined examples (2)
Real archived programs with this extension, byte-verified against the SWH archive, grouped by predicted language and by how the prediction was made. Useful for deciding what this extension actually is when the attribution is uncertain.
R (2) — 2 via fallback
swh:1:cnt:b766e8cd987fde00241968e0c634b7098e95dd10;origin=https://github.com/DillonHammill/CytoExploreR;anchor=swh:1:rev:2592724b567ca882d767d8334bd8144b3f49f424;path=/man/cyto_gate_type.Rd
swh:1:cnt:bf10fdf1440169ad1bbf15c9f7494a7f5e839f85;origin=https://github.com/Blue-Matter/MSEtool;anchor=swh:1:rev:f7f6738f2899a3c8ea70e71c0a16c22d8853200e;path=/man/getmov2.Rd