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BOOK: XSLT Programmer's Reference, 2nd Edition
This is the forum to discuss the Wrox book XSLT: Programmer's Reference, 2nd Edition by Michael Kay; ISBN: 9780764543814
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Old December 5th, 2008, 04:59 AM
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Default sum and translate in XPath

My XML has commas in the numbers so I'm using translate in order to treat as numerical values.
I now need to get the sum of a nodeset and have an issue when attempting to use sum and translate together.

I'm using XPath 1.0

Example XML
<?xml version="1.0" encoding="UTF-8"?>
    <item>thing one</item>
    <item>thing two</item>

The XPath I'm using will never work as sum returns the nodeset and translate only a single item so even if it worked it would only get one item.


Is there any way to do this or should I run a transform to remove commas?

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Old December 5th, 2008, 05:23 AM
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This is easy in XPath 2.0:


It can't be done in pure XPath 1.0 because the argument to sum() has to be a set of nodes; your nodes don't contain numbers, and XPath alone can't create new nodes. You can do it in XSLT 1.0 - one way is to write a recursive template that processes the nodes one by one, adding to a running total as it goes; another way is a two-pass approach where you construct a new tree containing the translated nodes. But 2.0 is much easier.

Michael Kay
Author, XSLT 2.0 and XPath 2.0 Programmer's Reference
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Old December 5th, 2008, 07:20 AM
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Thanks for your assistance, unfortunatly I am restricted to using 1.0 for the time being.


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