If we have a rule it must be as simple as possible, and maybe even in the short text of the relationship editor itself.
- Relationship Types / Label-Release / Phonographic copyright
- Relationship Types / Label-Recording / Phonographic copyright
Those two pages at least should contain something like:
When « ℗ 19XX Label » is printed, phonographic copyright applies to recordings.
When « (This) Compilation ℗ 19XX Label » is printed, phonographic copyright applies to release.
What do you think @reosarevok?