Use count(distinct-values(/test/row/string(transition)))
string() applied to an empty sequence returns the zero-length string, whereas
atomization applied to an empty sequence returns an empty sequence.
Michael Kay
Saxonica
On 26 May 2022, at 15:08, Roger L Costello costello(_at_)mitre(_dot_)org
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Hi Folks,
The following XML document has two row elements with no transition element
and two row elements with a transition element :
<test>
<row>
</row>
<row>
</row>
<row>
<transition>ABC</transition>
</row>
<row>
<transition>DEF</transition>
</row>
</test>
I want a count of the number of distinct transition values, where row
elements with no transition element are counted as 1.
So for the above XML document the count should return 3.
This XPath seems to work:
count(distinct-values(/test/row/transition)) +
count(/test/row[not(transition)][1])
But I am wondering if there is a better (simpler, less kludgy) XPath
expression?
/Roger
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