continuation of xsl:number

Hi all,

The data I have contains many nested steps, both in say <start> and
<end>.  To number these steps I use xsl:number - however because of the
doc structure <steps> in <end> start from 1 again (as it should), but I
need it to continue counting from the last step:

<root>
  <start>
    <s1>
      <para>1</para>
      <s2>
        <para>1.1</para>
      </s2>
    </s1>
    <s1>
      <para>2</para>
    </s1>
  </start>
  <end>
    <s1>
      <para>3</para>
      <s2>3.1....</s2>
    </s1>
  </end>
</root> 

As in the example, the numbering of the steps in the end should carry on
from the last step.

Is the only way to use count() instead of some neat use of xsl:number??
(they could go 9 steps deep so it would be quite a line of code...)

cheers
andrew

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