[xsl] Special processing for the first process of an element

[Peter Hickman <peter@xxxxxxxxxxxxx>]

In my xml data I have tags around highlighted search terms and when 
rendering it to XHTML I want to place a <a name="hit" /> on only the 
first occurrence of such a tag. The problem is that I don't seem to be 
able to use ancestor or preceding sibling to reliably identify the very 
first encounter of the tag. For example:

<p>
   <p>
      <p>
            <result>First</result>
      </p>
   </p>
   <p>
      <result>Second</result>
   </p>
</p>

When processing the tag around the word "Second" I seem to be unable to 
locate the earlier occurrence around the word "First".

Any ideas?

Thanks.