So this answer extends the example already given, by adding the number
() function.
Heh, don't listen to me, I'm still learning myself... number() isn't
needed here, as this works just fine:
<th><xsl:value-of select='./@lineId+1'/></th>
What I've just learned, is that I need to take a closer look at how
XSLT processors handle typing, my answer assumed number() was needed in
order to perform addition like you were trying, and was thus totally
wrong.
Anyway, I played around with it a bit more, adding this to my <tr>
template:
<xsl:param name='x' select='./@lineId'/>
And changing the <th> two different ways, as follows:
<th><xsl:value-of
select='following-sibling::data[(_at_)lineId=$x]/@lineId'/></th>
<th><xsl:value-of
select='following-sibling::data[(_at_)lineId=$x+1]/@lineId'/></th>
The first line results in <th/>, the second line works as expected.
The first line can be rewritten as select='//data[(_at_)lineId=$x]/@lineId'
and it will work as expected. So I suspect your problem is one of not
minding your context node, i.e. you started with this:
<xsl:param name='x' select='./@lineId'/>
Then, you have <xsl:value-of select='data[(_at_)lineId=$x]'/>, which can't
work because you haven't selected an axis... So it's hard to know how
to specifically help you here -- the 'data[(_at_)lineId=$x]' is correct, but
only if it's preceded by a proper axis, and followed by '/@lineId' since
you're after attribute content, instead of element content.
-Eric
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