JAX-RS 2.0 (JSR 339) has been slightly revised through the JCP Maintenance Release process and has recently passed the JCP MR ballot. This update (JAX-RS 2.0 rev A) is mostly about clarifications (including JavaDoc clarifications) and some fixes in Jersey, the JAX-RS Reference Implementation. The updated documents will be published soon on the JSR 339 page but in the meantime, you can check this page for details about the changes of JAX-RS 2.0 rev A. It should be noted that GlassFish 4.1, the Java EE 7 Reference Implementation, already supports this version of the JAX-RS specification (i.e. JAX-RS 2.0 rev A).

Originaly posted on The Aquarium blog.