On 26 Mar 2014, at 12:41, Szabo, Patrick (LNG-VIE)
<patrick(_dot_)szabo(_at_)lexisnexis(_dot_)at> wrote:
:
<xsl:for-each-group select="elem" group-starting-with="elem[@x !=
preceding-sibling::elem[1]/@x]">
Like all the other comparison operators, "!=" is implicitly existential. That
is, A!=B means "some a in A, b in B satisfies a!=b".
This is handy for "=", because you can say author="Smith" and it gives a
reasonable answer if there is more than one author.
It's very rarely useful for "!=", which is why most people advise against using
it. Use not(A = B) instead,
Michael Kay
Saxonica
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