...
It is recommended to adopt the proposal to make the API family a working group, and have the API sub-project focus on the development of one API or more APIs.a set of closely related APIs of which the version will be the same and evolve together. Ig versions may evolve separately, it indicates they should be handle in separate sub-projects.
See Herbert's proposal here: Proposal to establish API Families as Working Groups across API Sub Projects · Issue #7 · camaraproject/ReleaseManagement (github.com)
...
NOTE: if multiple API files are managed in one API Sub-project, each API shall have its own folder, and such that release branches and release packages shall can be created for each with a focus on a specific API.
API release checklist
...