The following additional JAXB dependencies are required to run e.g. Input.fromJaxb(...) in Java 9+:

• jaxb-core
• jaxb-impl
• activation

In xmlunit-core/pom.xml, these are already listed, but are only available for the xmlunit internal tests.
External Maven projects adding a dependency on xmlunit therefore miss these libraries, because test scoped dependencies are not transitive. I would appreciate, if

• they could be either declared as runtime scoped dependencies (for Java 9+)
• or marked as optional, including some documentation that the JAXB features require adding these additional dependencies manually