Subject: Re: [xsl] Clone a Nodeset and then modify some Elements From: Jonas Mellin <jonas.mellin@xxxxxx> Date: Wed, 03 Sep 2008 09:31:47 +0200 |
Hi All,
I'm trying to clone a nodeset and alter one or two of the element values in an attempt to save me having to rebuild all of them or copy them all over and add the new ones.
So What I would like to do is "Copy" SomeBlock named "A" with all the 50+
child elements intact, but modify one or more random fields with updated
values
[...]Variables in XSLT are single-assignment so you cannot update the content of the variable within the scope it was created. One solution is to implement a recursive function that builds the sequence item for item for each recursive call and when you reach the and of the input sequence you return the resulting sequence back to the top.
I have played with copying the entire SomeBlock into a Variable, but I'm struggling to find a mechanism to updated any of the values without looping through all the of the elements and writing them out unless they are the Names in question and then writing my own element which just seems lengthy to me. Isn't there a way to do something similar to the following:
<xsl:for-each select="/wrapper/actions/action">
<xsl:variable name="actionTtype" select="@type">
<xsl:variable name="blockName" select="@ref">
<xsl:variable name="tempSomeBlock">
<xsl:copy-of select="/wrapper/SomeBlock[@name='$blockName']" />
</xsl:variable>
<xsl:for-each select="field">
<!-- Locate the SomeField named @name in $tempSomeBlock and update
it's value to . of SomeField -->
</xsl:for-each>
<xsl:copy-of select="tempSomeBlock" />
</xsl:for-each>
As you can see this isn't right and I was looking for a short sharp kick in
the pants to point me in the right direction.
Caveats - Obviously this is a watered down example which I think covers the area I am having trouble with. The values that will replace the existing one will come from various sources further down the document, not just within the action\field elements
Any help or abuse greatly appreciated
Al
-- Carpe Diem! === Jonas Mellin, Assistant Professor in Computer Science School of Humanities and Informatics, Building E-2 University of Skvvde, P.O. Box 408, SE-541 28 Skvvde, Sweden Phone: +46 500 448321, Fax: +46 500 448399 Email: jonas.mellin@xxxxxx, URL: http://www.his.se/melj
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