position() problem with // axis + parent numbering problem

Hi - two questions.

One
---

The position() function isn't returning what I was expecting when combined
with the // axis, and I haven't been able to find what I'm after in the
spec - can someone point out why this isn't working?

I expected the following to produce mutually exclusive sets whose union
includes all <text> nodes in the input document.

<xsl:apply-templates select="//text[1]" />
<xsl:apply-templates select="//text[not(position() = 1)]" />

It appears this is not the case - I've tested this in Saxon and Xalan, so
I'm confident the implementors have it right - I just don't know why.
"[position() = 1]" returns all nodes that are the first children of their
parents, while [1] returns the first node in the context list. I thought
that [1] was the abbreviation for the other. Can someone tell me where
it says otherwise?

How should I put the predicate in the second expression to be the opoosite
of that in the first - ie, all nodes other than the first in the context
list

Two
---

I was trying to get the number of the parent node of the current node taken
across the entire document, and I can't see an easy way to do it. The parent
may not be the real parent, but may be several steps up the tree, although I
do know the element is of type <grouping_element>. The following seems to
work, but is there any way to condense this into a single <xsl:number> element?

      <xsl:variable name="parent_number">
        <xsl:for-each select="ancestor::grouping_element[1]">
          <xsl:number count="grouping_element" level="any" />
        </xsl:for-each>
      </xsl:variable>

Thanks in advance.

-- 
Warren Hedley
Department of Engineering Science
Auckland University
New Zealand


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