ancestor axis order

Given XML such as

   <define name="report">
      <element>
         <name ns="">report</name>
         <group>
            <group>

               <group>
                  <group>
                     <group>
                        <group>
                           <group>
                              <ref name="issues"/>
                              <ref name="vision"/>
                           </group>
                           <ref name="goals"/>
                        </group>
                        <ref name="scope"/>
                     </group>
                     <ref name="tasks"/>
                  </group>
                  <ref name="assessment"/>
               </group>

               <choice>
                  <empty/>
                  <ref name="references"/>
               </choice>
            </group>
            <ref name="owner"/>
         </group>
      </element>
   </define>

I need to determine, for each <ref/> child, whether there is
a <choice/> ancestor prior to the <define/> Ancestor.

I have 
<template match="define"
   <xsl:for-each select=".//ref">
      <element name="{@name}">
          choose
            when (choice prior to define ancestor)
              <xsl:attribute name="required">no</xsl:attribute>
            otherwise
              <xsl:attribute name="required">yes</xsl:attribute>
          /choose
       </element>
   </xsl:for-each>
 </xsl:template>

I.e. to set the required attribute to yes or no dependent on there
being a choice ancestor prior to the define ancestoer.

define element is not nested btw.


for the example above, references should be 'no' and
scope should be 'yes'



  

TIA DaveP


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