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RE: Nodeset equality, inequality, and relational operations in XPath
- To: "'xsl-list at mulberrytech dot com'" <xsl-list at mulberrytech dot com>
- Subject: RE: Nodeset equality, inequality, and relational operations in XPath
- From: Kay Michael <Michael dot Kay at icl dot com>
- Date: Mon, 7 Feb 2000 09:23:18 -0000
- Reply-To: xsl-list at mulberrytech dot com
> The definition of nodeset equality, inequality, and
> relational operations in XPath seems more than a little unusual to me.
You are right, but we have to live with it.
I think they went out of their way to avoid introducing existential
quantifiers and range variables ("there exists x in X such that", etc),
presumably with the aim of keeping simple things simple. I have seen many
other query languages attempt to do this and it always leads to some
expressions having counter-intuitive semantics. I remember a debate about
whether SQL should do this and fortunately it was thrown out on these
grounds.
Mike Kay
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