Obsidian

Introducing Bases, a new core plugin that lets you turn any set of notes into a powerful database. With Bases you can organize everything from projects to travel plans, reading lists, and more.

Bases are now available in Obsidian 1.9.0 for early access users.

making /obsidian • writing stephango.com

With Obsidian Bases, your data is backed by your local Markdown files and properties stored in frontmatter. To support the new query capabilities, we're introducing the .base file format and syntax.

Learn more:
https://help.obsidian.md/bases

Are .base files an open file format like .canvas files?

Computer Scientist who just thinks onchain is neat. /formative

yes
https://help.obsidian.md/bases/syntax