Tags make it easier to configure deployments by marking which deployables should be mapped to which containers.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.xebialabs.deployit</groupId>
    <artifactId>maven-deployit-plugin-dar-format</artifactId>
    <packaging>dar</packaging> <!-- DAR packaging -->
    <version>1.0</version>
    <name>Dar Format</name>
    <url>http://www.xebialabs.com</url>
    <build>
        <plugins>
            <plugin>
                <groupId>com.xebialabs.deployit</groupId>
                <artifactId>maven-deployit-plugin</artifactId>
                <version>3.9.4</version>
                <extensions>true</extensions> <!-- tells maven the plugin contains extensions -->
                <configuration>
                    <deployables>
                        <jee.War name="petclinic" groupId="com.xebialabs.deployit.demo.petclinic-war" artifactId="PetClinic">
                            <tags>
                                <value>frontend</value>
                            </tags>
                        </jee.War>
                        <jee.War name="petclinic-backend" groupId="com.xebialabs.deployit.demo.petclinic-war" artifactId="PetClinic-Backend">
                            <tags>
                                <value>backend</value>
                            </tags>
                        </jee.War>
                        <file.Archive name="mysql-backend" groupId="mysql" artifactId="mysql-connector-java">
                            <tags>
                                <value>frontend</value>
                                <value>backend</value>
                            </tags>
                        </file.Archive>
                    </deployables>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>