<execution>
            <id>modello-v3</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <configuration>
              <version>1.1.0</version>
              <models>
                <model>../api/maven-api-metadata/src/main/mdo/metadata.mdo</model>
              </models>
              <templates>
                <template>model-v3.vm</template>
              </templates>

              <version>4.0.0</version>
              <models>
                <model>target/mdo/maven.mdo</model>
              </models>
              <templates>
                <template>src/main/mdo/model-v3.vm</template>
                <template>src/main/mdo/merger.vm</template>
                <template>src/main/mdo/transformer.vm</template>
                <template>src/main/mdo/reader.vm</template>

          </execution>
          <execution>
            <id>model-v3</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
              <version>4.0.99</version>
              <templates>
                <template>model-v3.vm</template>
              </templates>
            </configuration>

          </execution>
          <execution>
            <id>v3</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
              <version>1.3.0</version>
              <templates>
                <template>model-v3.vm</template>
              </templates>
            </configuration>

            <goals>
              <goal>velocity</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
              <templates>
                <template>model-v3.vm</template>
              </templates>
              <params>
                <param>packageModelV3=org.apache.maven.toolchain.model</param>
                <param>packageModelV4=org.apache.maven.api.toolchain</param>