Property resolving for multiple Spring profiles (yaml configuration)

Question

Is there a defined order when multiple profiles are used for a property resolution.

I have yaml configuration file:

Answer 1

Is this something I can rely on?

Yes, the last-win strategy is consistent and is documented in the reference guide:

If several profiles are specified, a last-wins strategy applies. For example, if profiles prod,live are specified by the spring.profiles.active property, values in application-prod.properties can be overridden by those in application-live.properties.

(Unrelated, but about the link to the doc you've shared. I don't know if that's an accident but that's the documentation for Spring Boot 1.2.x which was released over 6 years ago).