If you use Maven 2 for your build you can simply add this repository to you pom:
<repository>
<id>ext.public.rel</id>
<name>External public repository</name>
<url>http://ulisse.pin.unifi.it:8080/archiva/repository/ext.public.rel</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>and then put this dependency:
<dependency>
<groupId>it.cnr.imaa.essi</groupId>
<artifactId>galeon2-ncml-gml</artifactId>
<version>0.9</version>
</dependency>To download the jar file you can visit this webpage.