RE: [xsl] Source Reducer

[<tomas.vanek@xxxxxxxxxxxxx>]

The reduction according the ancestor count (wihout "mode"):
 <xsl:template match="@*">
	<xsl:copy-of select=./>
 </xsl:template>

 <xsl:template match="node()">
   <xsl:param name="level>1</xsl:param>

   <xsl:copy>
	<xsl:apply-templates select="@*"/>
	<xsl:if test="$level &lt; 4">
		<xsl:apply-templates select="node()">
			<xsl:with-param name="level" select="$level +
1"/>
		</xsl:apply-templates>
	</xsl:if>
   </xsl:copy>
 </xsl:template>

<!-- ..... -->

Regards,
tomi

-----Original Message-----
From: Andrew Welch [mailto:ajwelch@xxxxxxxxxxxxxxx]
Sent: Monday, June 06, 2005 6:03 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: RE: [xsl] Source Reducer


> I have a source xml which is 19MB +  I'm running the following "source

> reducer" template against it using the
> MSXML4 parser, however it is slow (has been running well over
> 2 min. now).  Any suggestions on how to optimize this source reducer
> template?  Also, how does the ancestor match below work, what does it
> do exactly?
>
> <xsl:strip-space elements="*"/>
>
>  <xsl:template match="node()|@*">
>    <xsl:copy>
>      <xsl:apply-templates select="node()|@*"/>
>    </xsl:copy>
>  </xsl:template>
>
>  <xsl:template match="/*/*[position() > 20]"/>
>
>  <xsl:template match="*[ancestor::*[3]]"/>

The final no-op template will match any element with 3 ancestors - it
means the result tree will be no more than 3 deep.

To improve performance you need to replace the use of the ancestor axis
with something else... but the only thing that instantly springs to mind
is to use modes eg:

 <xsl:template match="node()|@*">
   <xsl:copy>
     <xsl:apply-templates select="node()|@*" mode="second"/>
   </xsl:copy>
 </xsl:template>

 <xsl:template match="node()|@*" mode="second">
   <xsl:copy>
     <xsl:apply-templates select="node()|@*" mode="stop"/>
   </xsl:copy>
 </xsl:template>

 <xsl:template match="node()" mode="stop"/>

I'm sure there is a better way...



This message is for the designated recipient only and may contain privileged,
proprietary, or otherwise private information.  If you have received it in
error, please notify the sender immediately and delete the original.  Any
other use of the email by you is prohibited.