Jakarta XML Binding API Packages 
Package Description
javax.xml.bind
Provides a runtime binding framework for client applications including unmarshalling, marshalling, and validation capabilities.
javax.xml.bind.annotation
Defines annotations for customizing Java program elements to XML Schema mapping.
javax.xml.bind.annotation.adapters
XmlAdapter and its spec-defined sub-classes to allow arbitrary Java classes to be used with Jakarta XML Binding.
javax.xml.bind.attachment
This package is implemented by a MIME-based package processor that enables the interpretation and creation of optimized binary data within an MIME-based package format.
javax.xml.bind.helpers
Jakarta XML Binding Provider Use Only: Provides partial default implementations for some of the javax.xml.bind interfaces.
javax.xml.bind.util
Useful client utility classes.