.fsFrom 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.
Case variants in archive: .fs (2.4M), .FS (672), .Fs (17), .fS (6) — aggregated above.
This extension is attributed to F#; F#; F#; Filterscript; Forth as primary by 5 authoritative claims.
.fs among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| F# | linguist | primary |
| F# | pygments | primary |
| F# | wikidata | primary |
| Filterscript | linguist | primary |
| Forth | wikidata | primary |
| Filterscript | pygments | secondary |
| Forth | linguist | secondary |
| Forth | pygments | secondary |
| Forth (programming language) | pygments | secondary |
| GLSL | linguist | secondary |
.fs 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 |
|---|---|---|---|---|---|
| Final Burn savestate Q105855448 file format | file format | — | application/octet-stream | — | Use as new PL ↗ |
| Forth source code file Q126828176 file format | file format | — | — | — | Use as new PL ↗ |
| Visual F# Source File Q126822716 file format | file format | — | text/x-fsharp | — | Use as new PL ↗ |
.fs file actually is.| Rule | Predicts | Kind | Predicates (truncated) |
|---|---|---|---|
h/linguist/.fs/0 | Forth | predicates | [{"kind": "any", "regexes": ["^(: |new-device)"]}] |
h/linguist/.fs/1 | F# | predicates | [{"kind": "any", "regexes": ["^\\s*(#light|import|let|module|namespace|open|type)"]}] |
h/linguist/.fs/2 | GLSL | predicates | [{"kind": "any", "regexes": ["^\\s*(#version|precision|uniform|varying|vec[234])"]}] |
h/linguist/.fs/3 | Filterscript | predicates | [{"kind": "any", "regexes": ["#include|#pragma\\s+(rs|version)|__attribute__"]}] |