XNIO is reported as a Public Domain project

3.x has a valid LICENSE file: https://github.com/xnio/xnio/blob/3.x/LICENSE.txt

However, the pom.xml does not specify a license: https://github.com/xnio/xnio/blob/3.x/pom.xml

As a result, when you search for the artifact its listed as CC0 https://mvnrepository.com/artifact/org.jboss.xnio/xnio-api/3.4.0.Final

To fix, please add a <license> stanza, similar to this (which overrides the underlying settings from jboss-parent): https://github.com/cdi-spec/cdi/blob/master/api/pom.xml#L20