Hi,
Le lundi 04 septembre 2006 à 12:24 +0100, Michael Kay a écrit :
> > The problem is that a comma has been used as a decimal
> > delimiter and sum() function seems to work only with dots. I
> > tested translate() function but it seems to work only with a
> > single node, not with a node-set. Is there any workaround
> > available for my problem?
>
> Like so many things (despite ERH's views) this one is so much easier in
> XPath 2.0:
>
> sum(for $x in ... return number(translate($x, '.', ',')))
>
> If you're stuck with 1.0, google for "XSLT sum computed values". The
> solutions fall into four categories: (1) multi-phase transformations, (2)
> higher-order functions (FXSL), (3) recursion over the items being summed,
> (4) extension functions. None of these can conveniently be used in an XPath
> (as distinct from XSLT) context.
Some of these options happen to be compatible with ISO Schematron.
As soon as implementations supporting XSLT/XPath 2.0 bindings will be
available, you will be able to use XPath 2.0 expressions such as your
"sum(for $x in ... return number(translate($x, '.', ',')))" in test
attributes.
Right now, with an implementation supporting EXSLT (such as Amara,
http://uche.ogbuji.net/tech/4suite/amara/), you can use the dyn:map
function (http://www.exslt.org/dyn/functions/map/dyn.map.html) and
write:
<schema xmlns="http://purl.oclc.org/dsdl/schematron" queryBinding="exslt">
<title>Sums with commas</title>
<ns prefix="dyn" uri="http://exslt.org/dynamic"/>
<pattern>
<rule context="Invoice">
<let name="sum"
value="sum(dyn:map(InvoiceRow/RowAmount, 'translate(., ",", ".")'))"/>
<let name="total"
value="translate(TotalAmount, ",", ".")"/>
<assert test="$sum = $total"> TotalAmount (<value-of select="$total"/>) doesn't match the sum
of RowAmounts (<value-of select="$sum"/>) </assert>
</rule>
</pattern>
</schema>
(You'll need to use the latest 4Suite CVS if you want to try that,
though).
Eric
> Michael Kay
> http://www.saxonica.com/
>
>
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