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------- Additional Comments From [EMAIL PROTECTED]  2004-12-10 17:29 -------
Another idea would be to use local properties to say if an attribute/element
is set or not, then one could use the usually ant idiom of using the if
attribute to test for the presence of an attribute/element.

<macrodef name="x">
   <element name="contents" optional="yes"/>
   <sequential>
      <my:sequential if="contents.element.set">
          <copy ../>
      </my:seqential>
   </sequential>
</macrodef>


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