The JSR 270 Expert Group recently decided upon the set of component JSRs that will appear in Mustang, a.k.a. Java SE 6. Here they are, grouped together by area:

There are a few differences between this set and the set originally proposed in JSR 270:

• JSR 173, the Streaming API for XML, was added; it's a prerequisite for both JAXB 2.0 and JAX-WS 2.0.
• JSRs 181 (WS Metadata), and 250 (Common Annotations) were added; these are prerequisites for JAX-WS 2.0.
• There is no JSR for "JAXP.next"; instead a minor maintenance revision of JAXP will be proposed for Mustang.
• JSR 268, the Java Smart Card I/O API, was dropped. Platform implementors are of course free to deliver an implementation of this JSR alongside their Java SE 6 implementations, which is what Sun intends to do, but JSR 268 won't be a required part of the platform.

Mustang's final release is slated for the third quarter of 2006. A lot could change between now and then, but unless something truly surprising happens then these are the JSRs that will appear in Mustang.