Axiomatics chose to distribute this library under the CDDL 1.1 license. This license requires that we re-distribute the library's source code. JAXB is licensed under a dual license - CDDL 1.1 and GPL 2.0 with Class-path Exception. That means you can choose which one of the two suits your needs better and use it under those terms. We use GlassFish Governance Policy, which means we can only accept contributions under the terms of OCA.