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<dynamicvariable<dynamicvariables>
...>   <variable ... <!-- other nested arguments might go here -->
      <filters>
         <filter1 .../>
         <filter2 .../>
         ... <!-- more filters might go here -->
      </filters>
   </variable>
</dynamicvariable>

 <variable<dynamicvariables>
   <variable name="previous.wrapper.java.command.canonical" value="${previous.wrapper.java.home.canonical}/bin/java"

             condition="haveInstallPath+isCompatibleUpgrade+haveWrapperJavaCmd+isSetCanonicalJavaHome">
      <filters>
         <location basedir="${INSTALL_PATH}"/>
      </filters>
   </variable>
</dynamicvariables>