Before you can start to build DocBook documents you first need to install and configure Maven2. At the time of writing Maven 2.0.8 is the latest released version that has been tested and found to work correctly. System requirements and download instructions can be found here.

In order for Maven to reference the JBoss public maven repository you will need to create a ~/.m2/settings.xml file with the following contents:

<settings>
  <profiles>
    <profile>
      <id>jboss.repository</id>
      <activation>
        <property>          
          <name>!jboss.repository.off</name>
        </property>
      </activation>
      <repositories>
        <repository>          
          <id>snapshots.jboss.org</id>
          <url>http://snapshots.jboss.org/maven2</url>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </repository>
        <repository>
          <id>repository.jboss.org</id>
          <url>http://repository.jboss.org/maven2</url>
          <snapshots>
            <enabled>false</enabled>
          </snapshots>
        </repository>
      </repositories>
      <pluginRepositories>
        <pluginRepository>
          <id>repository.jboss.org</id>
          <url>http://repository.jboss.org/maven2</url>
          <snapshots>
            <enabled>false</enabled>
          </snapshots>
        </pluginRepository>
        <pluginRepository>
          <id>snapshots.jboss.org</id>
          <url>http://snapshots.jboss.org/maven2</url>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>
</settings>

If you already have a ~/.m2/settings.xml file then you simply need to add the above <profile> element to your <profiles>.