I have a doubt about testing preceding-sibling
processing-instruction.
I have this xml:
<root>
<child1>
child 1
</child1>
<?proc?>
<child2>
child 2
</child2>
</root>
And I need to know if child2 has the first
preceding-sibling as a processing-instruction.
This needs care because the immediately preceding sibling is actually a
whitespace text node. If you've used xsl:strip-space to remove such text
nodes, it's
test="preceding-sibling::node()[1][self::processing-instruction()]"
but if you need to ignore such text nodes then it's
test="preceding-sibling::node()[not(self::text()[normalize-space()=''])][1][
self::processing-instruction()]"
Michael Kay
http://www.saxonica.com/
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