.x
5 claimants
3 primary
1 secondary
shared primary (3)
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.
619.5K
total occurrences
217.2K
since 2019 (35.1%)
1970–2023
years active
Case variants in archive: .x (557.8K), .X (61.7K) — aggregated above.
Attribution status
This extension is attributed to DirectX 3D File; Logos; RPC as primary by 3 authoritative claims.
Claimants (6)
Languages that list
.x among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| DirectX 3D File | linguist | primary |
| Logos | pygments | primary |
| RPC | linguist | primary |
| linker-script | linguist | secondary |
| Logos | linguist | secondary |
| xbasic | wikipedia | proposed |
Wikidata says… (4)
File formats, image formats, audio codecs and other non-PL
entities that claim
.x 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 |
|---|---|---|---|---|---|
| X File Format Q4545483 file format | file format | — | — | — | Use as new PL ↗ |
| IRAF Q3051072 software system for the reduction and analysis of astronomical data | software | — | — | — | Use as new PL ↗ |
| AVS X image Q28205727 file format | file format | — | image/x-avsx | — | Use as new PL ↗ |
Disambiguation rules (4)
Linguist heuristics that decide, by content, which language a
.x file actually is.| Rule | Predicts | Kind | Predicates (truncated) |
|---|---|---|---|
h/linguist/.x/0 | DirectX 3D File | predicates | [{"kind": "any", "regexes": ["^xof 030(2|3)(?:txt|bin|tzip|bzip)\\b"]}] |
h/linguist/.x/1 | RPC | predicates | [{"kind": "any", "regexes": ["\\b(program|version)\\s+\\w+\\s*\\{|\\bunion\\s+\\w+\\s+switch\\s*\\("]}] |
h/linguist/.x/2 | Logos | predicates | [{"kind": "any", "regexes": ["^%(end|ctor|hook|group)\\b"]}] |
h/linguist/.x/3 | linker-script | predicates | [{"kind": "any", "regexes": ["OUTPUT_ARCH\\(|OUTPUT_FORMAT\\(|SECTIONS"]}] |
SWH-mined examples (0)
No archived examples for .x in our local mirror yet.