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.
1.4M
total occurrences
158.6K
since 2019 (11.0%)
1977–2023
years active
Case variants in archive: .aux (1.4M), .AUX (448), .Aux (5) — aggregated above.
Confirm or correct this extension
Existing claims are only secondary or weakly-attested. A confirmation (or correction) would strengthen the catalog. Vocabulary reference: docs/extension_labels.md.
What happens after I submit?
A new GitHub issue is opened in this repo with your form contents
in a structured YAML block and the label ext-review.
Your GitHub login becomes the annotator; the issue's
created_at is the submission timestamp.
A curator script (tools/process_extension_labels.py)
fetches all ext-review issues and writes their
parsed contents into
data/derived/extension_labels.csv with
curator_status="new". Until this script runs, your
submission lives only as the GitHub issue.
Your submission shows up on the curator triage page
(/review/curator/)
under "new". Maintainers review the issue (comment, ask for
clarification, accept or reject) and edit
extension_labels.csv to set
curator_status to accepted.
For pl/<id> labels, build_pl_taxonomy.py
promotes accepted labels into
ext_claim.csv with
source="manual_review:<your-login>" and
strength="proposed". The next site rebuild then
shows your claim on this extension's page and on the
language's page.
Friendly-name + reference-URL labels (e.g.
binary:image for .png) are not
promoted into ext_claim.csv (they aren't PL
claims) but are surfaced on this page's "Prior labels"
table so anyone landing here sees them next to the auto-detected
category.
In short: submitting opens an issue (provenance), and a small
ingestion pipeline turns issues into rows the site renders. The
loop is currently manual (the curator script must be run by a
maintainer); GitHub Actions could automate it on each new issue.
Claimants (3)
Languages that list .aux among their extensions. Strength reflects whether the upstream source treated it as their primary extension.
File formats, image formats, audio codecs and other non-PL
entities that claim .aux 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.
Real archived programs with this extension, byte-verified against the SWH archive. Useful for deciding what this extension actually is when the attribution is uncertain.