.tag
2 claimants
1 primary
1 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.
725.0K
total files
75.9K
first seen 2021–2025 (10.5%)
2017
median year (half its files since)
Case variants in archive: .tag (722.7K), .TAG (1.9K), .Tag (378) — aggregated above.
Attribution status
This extension is attributed to Tag as primary by 1 authoritative claim.
Authoritative sources: △ Linguist · secondary ✗ Pygments · no claim ✓ Wikidata · Q117448727 ✗ Wikipedia · no claim
Claimants (2)
Languages that list
.tag among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Tag | wikidata | primary |
| JSP | linguist | secondary |
Wikidata says… (4)
File formats, image formats, audio codecs and other non-PL
entities that claim
.tag 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 |
|---|---|---|---|---|---|
| Cache Directory Tagging Standard Q105851105 file format | file format | — | text/plain | — | Use as new PL ↗ |
| DataFlex Query Tag Name Q48106551 file format | file format | — | — | — | Use as new PL ↗ |
| TagInfo data Q105851424 file format | file format | — | — | — | Use as new PL ↗ |
Disambiguation rules (1)
Linguist heuristics that decide, by content, which language a
.tag file actually is.| Rule | Predicts | Kind | Predicates (truncated) | Measured on SWH |
|---|---|---|---|---|
h/linguist/.tag/0 | JSP | predicates | [{"kind": "any", "regexes": ["<%[@!=\\s]?\\s*(taglib|tag|include|attribute|variable)\\s"]}] |
SWH-mined examples (0)
No archived examples for .tag in our local mirror yet.