John Wang wrote:
> 
> 
> <?xml version="1.0"?>
> <abuncha>
>         <thing>1</thing>
>         <thing>2</thing>
>         <thing>3</thing>
>         <thing>5</thing>
>         <sum>11</sum>
> </abuncha>
> 
> my question is: Where does the 11 come from?
> 

Aha. Try ...

<count>
  <xsl:value-of select="count(//thing[.!='N/A'])"/>
</count>

... for the value you *do* want.

The origin of the 11? Consider the difference between sum() and count()
...

Francis.

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