doc(spec): deprecate the single string form of isBasedOn

[bfabio]

The key accepts a bare string or an array.

A one element array covers the single case, and 1.0 will drop the string form.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
publiccode-yml	Ready	Preview	Aug 26, 2026 2:03pm

[bfabio]

@yaml-9000 minor

[yaml-9000]

Thanks for your contribution 🙏

This is now marked as a minor-change proposal to the standard,
this means that old versions of publiccode.yml will still be valid with this change.

Example of minor changes are additions of new keys or making keys optional.

The next eligible voting round will take place on September 30, 2026

cc @publiccodeyml/steering-committee

_{📄 Voting procedure | 📄 Working Group Charter | 🤖 bot commands}

[dptdgi]

This is really a minor change, so 👍

Please add to future change proposal also an impact analysis (i.e how many project affected?, how to coordinate with other project like the editor)

This will help the assessment of the impact and the migration path.