Let's see how POM overriding works. In the following example, we extend the repositories section to add one more repository to what is defined in the Maven super POM file:
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>com.packt</groupId>
<artifactId>sample-one</artifactId>
<version>1.0.0</version>
<repositories>
<repository>
<id>wso2-nexus</id>
<name>WSO2 internal Repository</name>
<url>http://maven.wso2.org/nexus/content/groups/wso2-public/
</url>
<releases>
<enabled>true</enabled>
<updatePolicy>daily</updatePolicy>
<checksumPolicy>ignore</checksumPolicy>
</releases>
</repository>
</repositories>
</project>Type the following command from the directory, where you have the previous POM file:
$ mvn help:effective...