Re: How do I determine that an item is a numeric atomi

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Subject: Re: How do I determine that an item is a numeric atomic value?
From: Michael Kay <mike@xxxxxxxxxxxx>
Date: Sat, 02 Oct 2010 22:55:47 +0100

In XPath 1.0:
==========
number($x) = number($x)

That would also return true if $x is a string or boolean or a node that can be converted to a number, for example the string "12" or the boolean true() or an attribute containing the value "12". In fact I think that's the closest you can get in XPath 1.0 - and it's good enough, because you don't really want to know whether it IS a number, you want to know whether it can be used in a context where a number is required.

Michael Kay
Saxonica

In XPath 2.0
==========
Either the above, or:
$x instance of xs:double or $x instance of xs:decimal

Current Thread
How do I determine that an item is a numeric atomic value? Costello, Roger L. - 2 Oct 2010 15:27:53 -0000 Dimitre Novatchev - 2 Oct 2010 15:55:23 -0000 Michael Kay - 2 Oct 2010 21:55:55 -0000 <= Michael Kay - 2 Oct 2010 21:53:05 -0000 David Carlisle - 2 Oct 2010 22:10:52 -0000 Mukul Gandhi - 3 Oct 2010 01:03:16 -0000 Mukul Gandhi - 3 Oct 2010 05:17:57 -0000

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