Currently there is a JAXB library wrapper module in IDE cluster that is used by other modules.
Problem of this module is the big number of friends. 
Another problem is that using JAXB API in Netbeans modules requires to establish a friend contract.

The JAXB library module "wraps" the following five jar files:
activation.jar
jaxb-api.jar
jaxb-impl.jar
jaxb-xjc.jar
jsr173_api.jar

The solution is to divide the JAB library into JAXB API part (stable module) and JAXB implementation part (friend module).
Most of the clients would only depend on API Module, so the number of friends, of implementation part, can be reduced
dramatically.

Proposed jar files in JAXB API module:
activation.jar
jaxb-api.jar
jsr173_api.jar

Proposed public-packages of JAXB API module:
                <package>javax.activation</package>
                <package>javax.xml.bind</package>
                <package>javax.xml.bind.annotation</package>
                <package>javax.xml.bind.annotation.adapters</package>
                <package>javax.xml.bind.attachment</package>
                <package>javax.xml.bind.helpers</package>
                <package>javax.xml.bind.util</package>
                <package>javax.xml.stream</package>
                <package>javax.xml.stream.events</package>
                <package>javax.xml.stream.util</package>

The rest two jar files will be left in JAXB implementation module.