Java 6 and JaxB 2.1

Question

The original release of Java 6 came with JAXB 2, but I have been told that 'later' Java 6 releases ship with JAXB 2.1.

Does anyone know what the first version of Java 6 to ship with JAXB 2.1 was?

Answer 1

Apparently Java 6 Update 4 was the first version to ship with JAXB 2.1 (source).

Answer 2

JAXB gets periodically integrated into latest JDK releases, so, using the latest JDK implies using the latest (stable) JAXB version.

I suppose a possible JAXB 3.0 wouldn't make it into JDK 6, same as JAXB 2.0 hasn't made it into JDK 5.