Open Chronology Files

Changes since v0.22.1.

Early release. In SemVer terms, anything may change before 1.0, including file formats, the HTTP API and settings, though changes to .ochx and .och files will come with conversions.

Security

• Two ways to make a server unresponsive are fixed.
• Server times: a server now limits how many digits a time may have, counted before any arithmetic. Times in the editor, the desktop app and the offline file stay unbounded.
• Save order: a save checks that the account may write the timeline before reading the document.
• Markdown tables and excerpts: they now take linear time on any input.
• Advisories: details will follow once servers have upgraded.
• TIME_DIGIT_LIMIT (new, optional) sets a server's limit as <numerator>/<denominator> digits of a time's exact fraction.
• Default: 1000/65, from 10^-64 to below 10^1000 of the timeline's unit. The largest real timelines use 18 and 7 digits.
• unlimited: keeps times unbounded on the server as well, where everyone who may save a timeline is trusted (administration).

Added

• Explore covers your own timelines and favorites (#464). The dashboard's separate Your timelines and Your favorites lists are gone. Explore's filters, signed in, now offer:
• My timelines;
• Only timelines I starred;
• Visibility, to show public, private or both.

These apply to timelines and events alike. ＋ New timeline and Your public profile sit beside the page's heading.

• Which events search engines list (#467). A timeline's Sharing & settings → Search engines chooses between three options:
• Automatically: events with notes and titles of their own, and none when the notes are templated, as a log import's are.
• All of them.
• None.

Unlisted events keep their pages, marked noindex, and are left out of the sitemap and IndexNow.

• llms.txt and llms-full.txt (#482): the site for AI engines and agents, generated from the help, linked from the footer.
• Link-preview cards for the site's own pages, drawn by each server with its name and address, and one per audience page.

Changed

• Event pages describe their time as the timeline writes it ("539 BCE", not a timestamp), in plain text without Markdown (#466). Their structured data's temporalCoverage is valid ISO 8601 (#468), and they carry a breadcrumb trail (#474).
• Page titles fit what search results show (#469).
• Help pages have descriptions of their own (#470). The FAQ carries FAQPage structured data (#483), and the page's own heading now comes before the help's navigation (#484).
• Explore and profiles describe how much they hold (#471).
• Names: the site's structured data names it with the software it runs (#472), and the home page and FAQ say what OpenChronology is in one sentence (#481).

Upgrading

Install the new package and run openchronology-migrate as usual. The migration adds each timeline's search-engine setting (index_events, automatic by default). TIME_DIGIT_LIMIT is a new optional setting; left empty, a server accepts times up to 1000/65 digits.