You can't do this; allowing it would break the non-sequential nature of
XSLT (unless you were happy to have the lines in your log file appear in
random order).

XSLT processing should generally be output-driven, not input-driven. If
you need to produce two different outputs that use the same input, then
access the input twice; if this looks as if it will be inefficient, then
save intermediate results in a variable.

Michael Kay


> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Kloeck, Erwin
> Sent: 19 September 2003 09:13
> To: xsl-list@Lists. mulberrytech. com (E-Mail)
> Subject:  xsl:result-document appending
> 
> 
> Hi,
> 
> I want to write out something like a log file from within a 
> for-each loop. I do some processing and at one point within 
> the loop I want to write a line to a different file. 
> 
> Here is what I do:
> 
> --------- log.xml --------- 
> <?xml version="1.0" encoding="UTF-8"?>
> <top>
>   <item value="hugo"/>
>   <item value="otto"/>
>   <item value="xaver"/>
> </top>
> 
> --------- log.xsl --------- 
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet version="2.0" 
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
> xmlns:fo="http://www.w3.org/1999/XSL/Format">
>   
>   <xsl:output name="log-format" method="text" 
> omit-xml-declaration="yes"/>
>   <xsl:template match="/">
>     <xsl:for-each select="top/item">
> 
> 	<!-- some involved processing with variables that are 
> used in the log entry -->
> 
>       <xsl:result-document href="log.txt" format="log-format" >
>         <xsl:value-of select="concat(string(position()), ' = 
> ', @value)"/>
>       </xsl:result-document >
>     </xsl:for-each>
>   </xsl:template>
> </xsl:stylesheet>
> 
> --------- log.txt --------- 
> 3 = xaver
> 
> 
> I would like log.txt to look like this:
> --------- log.txt --------- 
> 1 = hugo
> 2 = otto
> 3 = xaver
> 
> For this I would like to be able to append to the existing 
> log.txt file. Is there a way to do this?
> 
> 
> The alternative I can think of is to run trough the for-each 
> loop twice, once to do the processing and once to write the 
> log file. I hope I have other options.
> 
> 
> Thanks
> 
> Erwin
> 
> ..............................
> 
> Erwin Kloeck
> Produktentwicklung
> 
> Oestreicher + Wagner 
> Medientechnik GmbH
> Frankenthaler Strasse 20
> D-81539 Muenchen
> 
> Fon   +49 (0)89-68961 216 
> Fax   +49 (0)89-68961 271
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 


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