Keeping track of the different component version in EE 6 and EE 7

The Java Enterprise Edition has changed a lot from previously making heavy usage of XML configuration and now using Annotation instead, which leaves XML files almost empty compared to older EE version. But all these changes is also a headache to developers that must keep track of the different version in the different EE version. A good summary site for that is

http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/javaee/index.html#6

and for JPA

http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/persistence/index.html

And another good reference site for JPA is

http://en.wikibooks.org/wiki/Java_Persistence