7. API Evolution - 7.1. API Version and Status - 《JUnit 5 User Guide》

7.1. API Version and Status

7.1. API Version and Status

Every published artifact has a version number <major>.<minor>.<patch>, and all publicly available interfaces, classes, and methods are annotated with @API from the @API Guardian project. The annotation’s status attribute can be assigned one of the following values.

Status	Description
`INTERNAL`	Must not be used by any code other than JUnit itself. Might be removed without prior notice.
`DEPRECATED`	Should no longer be used; might disappear in the next minor release.
`EXPERIMENTAL`	Intended for new, experimental features where we are looking for feedback. Use this element with caution; it might be promoted to `MAINTAINED` or `STABLE` in the future, but might also be removed without prior notice, even in a patch.
`MAINTAINED`	Intended for features that will not be changed in a backwards- incompatible way for at least the next minor release of the current major version. If scheduled for removal, it will be demoted to `DEPRECATED` first.
`STABLE`	Intended for features that will not be changed in a backwards- incompatible way in the current major version (`5.*`).

If the @API annotation is present on a type, it is considered to be applicable for all public members of that type as well. A member is allowed to declare a different status value of lower stability.