Data & privacy
How we handle your data
What information this service collects, how widely it is shown, and what it is used for. We will update this page (and notify where appropriate) before any change. (Last updated: 5 June 2026.)
What we collect
When you sign in with Google we receive your display name, email address and profile picture from Google. We also store the comments, error reports and corrections you submit.
What is public
Comments, reports and corrections — and the display name attached to them — are public and appear to other readers, in the changelog and on the contributor leaderboard. Commenting and error reporting require sign-in and are recorded under your display name. Your email address is never public; only administrators can see it, and only for account management (such as handling abuse or assigning roles).
How it is used
We use this information first to run the service — discussion, correcting errors and improving the text. The comments, error reports and suggested corrections you post, and the discussion around them, are published as a record of scholarly dialogue under CC BY-SA 4.0. This means anyone — for scholarly research and otherwise — is free to cite, redistribute and reuse them, as long as they keep the credit (attribution to the contributor) and ShareAlike (the same licence). We, the operators, also use them to report research results and to improve the service, but always in strict compliance with CC BY-SA 4.0; we do not sell or provide the data to third parties for advertising or commercial purposes. Before any new use, we will update this page and notify you where appropriate.
Usage analytics
To improve the site we use Cloudflare Web Analytics — anonymous, aggregate measurement. It sets no cookies and does not identify individuals (only aggregate figures such as page views, referrers and approximate country). It is not used for advertising or shared with third parties.
Your contributions
Comments, error reports and suggested corrections posted to the service are kept as a record of scholarly dialogue and published under CC BY-SA 4.0. Adopted corrections appear in the public changelog and are recorded as your contribution. Each comment has a stable id and can be referenced individually through a citable permalink.
Storage & your choices
Data is stored on Cloudflare (D1 and R2). Once content (a comment, error report or suggested correction) is posted and published, then — for preservation of the scholarly record and the nature of the licence — it is not erased from the database (D1). You can “hide” a post so other readers no longer see it, but the content itself remains stored in the system (it is also retained for abuse handling). Note that because each comment has a citable link, if a comment you have hidden was already cited externally, its text may still be shown — with a “withdrawn by the author” notice and only when opened via that citation link — so the citation can be verified (it is not shown in normal browsing).
You can edit or hide your own comments at any time, and turn each kind of notification on or off under “Notifications” on your profile. “Delete account” on your profile hides all your comments and error reports from the interface at once. It also removes or anonymises — not only on screen but in the database (D1) itself — the information that could identify you: your display name, email, profile picture, bio, affiliation, and the link to your Google account (your display name is replaced with “(deleted user)” and the Google connection is severed). As a result, even in the database your posts are no longer connected to you. However, the substance of the records — such as the text of a post — is, as above, retained rather than erased. You agree to this explicitly through the consent shown at first sign-in.
Corrections already reflected in the text cannot have their content withdrawn — for textual consistency and the nature of the licence — but the anonymisation above hides your name as the contributor.
Operators & contact
This site is run by the following researchers: 岩田 直也 (Nagoya University / National Institute of Informatics) / 田中 一孝 (J. F. Oberlin University) / 小川 潤 (the University of Tokyo).
For questions, problem reports or data-deletion requests, please use our feedback form: https://forms.gle/1NTz78iubG9bwrgQA
