pointer to a node/nodeset?

So basically, I have a xml structure like this:

<resultset>

  <metadata>
    <path name="DONOR">   <!--  #1 -->
      <property name="label">Donor</property>
      <path name="DONOR_ID">
        <property name="label">Donor Id</property>
        <property name="link">DONOR</property>
      </path>
      <path name="DOCUMENT">
        <property name="label">Document</property>
        <path name="URL"/>
      </path>
    </path>
  </metadata>

  <result>
    <result-item name="DONOR">
      <attr name="DONOR_ID">100</attr>   <!-- #2 -->
      <ref name="DOCUMENT">
        <attr name="URL"></attr>
      </ref>
    </result-item>
  </result>

</resultset>

As I traverse the <result> I need access to the appropriate meta data.
Currently, if I'm at <attr name="DONOR_ID"> (node #2) and I want its label,
I build a string path by going through the ancestor-or-self axis. So I end
up with "DONOR.DONOR_ID" and then I traverse the metadata looking for the
node with that path.
This would be a lot more efficient if I moved through the metadata at the
same time as the result.. is there a way to maintain a pointer to the
appropriate metadata node (maybe using a tree fragment/nodeset? cant figure
those things out) and pass it around with xsl:param while I'm traversing
the <result>?
So I'm at node #2 I'd have a variable $metanode that points to #1 somehow.
Then I'd know to go to its child with name "DONOR_ID",  and that would be
the next $metanode.
Or can anyone see an even nicer way of doing this, with keys or something
fancy?  :)

Thanks much,
Konrad Rokicki


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