Re: Can I access elements in the output tree?

[Peter Paulus <paulus at neroc dot nl>]

I've been able to setup this scenario in Xalan version 1.2.

There is a side-effect to this (With Xalan?) if your output method is xml:
The xml-processing instruction (<?xml version='1.0'?> appears after the you
have inserted the node-set into the final result tree with <xsl:copy-of
select='$xxx'/>. Effectivelly the xml processing instruction is at the end
of the output.

I tried to insert a <xsl:processing-instruction name='xml'/> into the final
output tree just before copying the node-set. This however is not allowed.

Inserting a <xsl:comment/> moved the xml processing instruction to the front
of the output again, even before the comment gets inserted.

Template rules should start from the / element of the input document.

Here's an updated version of Michael's scenario.

<?xml version='1.0' encoding='ISO-8859-1'?>
<xsl:transform version='1.0'
    xmlns:xsl='http://www.w3.org/1999/XSL/Transform'
    xmlns:xalan='org.apache.xalan.xslt.extensions.Nodeset'
    extension-element-prefixes='xalan'
>

<xsl:output method='xml' encoding='ISO-8859-1' omit-xml-declaration='no'
media-type='application/qxml'/>

<xsl:template match='/'>
<xsl:variable name='output'>
<document>
<page index='1'>...</page>
<page index='2'>...</page>
</document>
</xsl:variable>

<xsl:comment/>
<xsl:apply-templates select='xalan:nodeset($output)'/>
<xsl:copy-of select='$output'/>
</xsl:template>

<xsl:template match='/document'>
<apply-templates/>
</xsl:template>

<xsl:template match='/document/page[@index = "1"]'>
...
</xsl:template>

<xsl:template match='/document/page[@index != "1"'>
...
</xsl:template>

</xsl:transform>

With kind regards,
Peter Paulus


on 10/27/00 1:11 PM, Kay Michael at Michael.Kay@icl.com wrote:

>> Would it be possible to insert elements in the output tree
>> and subsequently access them? If so, would there be any restrictions?
> 
> You can create a result tree fragment and then access it using the
> node-set() extension function that comes with most popular XSLT processors.
> You can't access data once it's written to the final result tree, though.
> (There's a good reason for this, most processors don't actually construct
> the result tree in memory, they serialize each node as soon as it is
> written). But that's not a restriction, you write:
> 
> <xsl:template match="/">
> <xsl:variable name="xxx">
> ... normal processing ...
> </xsl:variable>
> <xsl:apply-templates select="xx:node-set($xxx)" mode="phase2"/>
> <xsl:copy-of select="$xxx"/>
> </xsl:template>
> 
> This has the effect you describe.
> 
> Mike Kay 
> 
> 
> XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list




 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list