max() and xs:dateTime

Hello,

I almost hate to bring this up here, as I know it's really more of an
XPath/XSLT issue than something to do with OPS, but I have a
stylesheet that I'm trying to select the greatest (most recent)
dateTime from a collection of values.

My statement looks somewhat like this:
<xsl:value-of select="max(//@modified)"/>

doing this gives me the error:
Failure converting {2004-11-14T00:42:00-05:00} to a number

I've also tried wrapping the selector in an explicit cast:
<xsl:value-of select="max(xs:dateTime(//@modified))"/>

but that just gives me the error:
A sequence of more than one item is not allowed as the value in 'cast
as' expression

does anyone know of a good way to get this to read the values of
//@modified as xs:dateTime? I'm don't have a schema attached, but I
would if it would work. I don't have Saxon-SA, do I need it?

Any help with this would be greatly appreciated.

Daniel E. Renfer (http://kronkltd.net/)


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On 3/28/06, Daniel E. Renfer <[hidden email]> wrote:
> I almost hate to bring this up here, as I know it's really more of an
> XPath/XSLT issue than something to do with OPS, but I have a
> stylesheet that I'm trying to select the greatest (most recent)
> dateTime from a collection of values.

No problem. We like XPath questions too :).

> I've also tried wrapping the selector in an explicit cast:
> <xsl:value-of select="max(xs:dateTime(//@modified))"/>

//@modified will return a sequence, while you want to convert each
element of the sequence to an xs:dateTime. So give this a try:

max(for $d in //@modified return xs:dateTime($d))

Alex
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Thanks, that did the trick. I was thinking about that, but for some
reason I thought FLWOR was only available in XQuery. I was trying to
figure out a way to do this same thing using just 'xpath'. (I'm still
transitioning myself to XSLT 2.0)

Daniel E. Renfer (http://kronkltd.net/)

On 3/28/06, Alessandro Vernet <[hidden email]> wrote:

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