> This is interesting ...
> 
> The value is zero because at the point in time, according to XSLT 1.0 
> Section 7.7 the <note> element isn't being processed and there are no 
> preceding notes, so there is nothing to count.
> 
> But section 7.7.1 states that integers being processed are 
> greater than zero.
> 
> So, I'm guessing it is incumbent on the stylesheet writer 
> never to be in 
> the position of getting a zero value when using <xsl:number>.  But it 
> doesn't say that explicitly in the Recommendation.
> 
> Can anyone on the committee comment on this?  Are users of 
> <xsl:number> 
> required to use it only in situations where a positive number 
> is being returned?

Erratum E23 fixes this contradiction in the spec, specifying that an
empty list is returned in this situation, not a list of length one
containing the number zero.

http://www.w3.org/1999/11/REC-xslt-19991116-errata/

Michael Kay


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