maven-archetype/maven-archetype-model/src/main/mdo/archetype.mdo

<?xml version="1.0"?>

 <!-- START SNIPPET: modello-model -->

<model>
  <id>archetype</id>
  <name>Archetype</name>
  <description><![CDATA[Maven's model for the archetype descriptor.]]></description>
  <defaults>
    <default>
      <key>package</key>
      <value>org.apache.maven.archetype.model</value>
    </default>
  </defaults>
  <classes>
    <class rootElement="true" xml.tagName="archetype">
      <name>ArchetypeModel</name>
      <description>Describes the assembly layout and packaging.</description>
      <version>1.0.0</version>
      <fields>
        <field>
          <name>id</name>
          <version>1.0.0</version>
          <required>true</required>
          <type>String</type>
        </field>
        <field>
          <name>allowPartial</name>
          <version>1.0.0</version>
          <required>true</required>
          <type>boolean</type>          
        </field>
        <field>
          <name>sources</name>
          <version>1.0.0</version>
          <association>
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>
        <field>
          <name>resources</name>
          <version>1.0.0</version>
          <association>
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>        
        <field>
          <name>testSources</name>
          <version>1.0.0</version>
          <association>
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>        
        <field>
          <name>testResources</name>
          <version>1.0.0</version>
          <association>
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>                
        <field>
          <name>siteResources</name>
          <version>1.0.0</version>
          <association>
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>                        
      </fields>
    </class>
  </classes>
</model>

 <!-- END SNIPPET: modello-model -->