As noted in https://nipafx.dev/javadoc-tags-apiNote-implSpec-implNote/ there are new apidoc tags used throughout the JDK.

While these are not standardized, but were introducied with https://bugs.openjdk.java.net/browse/JDK-8008632 and are documented in https://bugs.openjdk.java.net/browse/JDK-8068562 and are very useful for documentation. Add required javadoc configuration to recognize these tags, essentially saying we are endorsing them – but the spec is really owned by odlparent.