Setting a transformers output properties

The following configuration snippet would set the output property omit-xml-declaration to yes:

  <build>
    <plugins>
      ...
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>xml-maven-plugin</artifactId>
        <executions>
          <execution>
            <goals>
              <goal>transform</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <transformationSets>
            <transformationSet>
              <dir>src/main/xml</dir>
              <stylesheet>src/main/stylesheet.xsl</stylesheet>
              <outputProperties>
                <outputProperty>
                  <name>omit-xml-declaration</name>
                  <value>yes</value>
                </outputProperty>
              </outputProperties>
            </transformationSet>
          </transformationSets>
        </configuration>
      </plugin>
      ...
    </plugins>
  </build>