xslt processing on select attribute on apply-templates -

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i have xslt below , apply xslt input xml[pasted below], working fine except 1 thing need clarify.

this input xml

<test>   <experiment id='1'>     <dish1>       <conditions pressure='x' temp='y'/>       <measurement timestamp='8am' reading='y'/>     </dish1>     <dish2>       <conditions pressure='x' temp='y'/>       <measurement timestamp='8am' reading='y'/>     </dish2>     <dish1>       <conditions pressure='x' temp='y'/>       <measurement timestamp='2pm' reading='y'/>     </dish1>     <dish2>       <conditions pressure='x' temp='y'/>       <measurement timestamp='2pm' reading='y'/>     </dish2>    </experiment>    <experiment id='2'>     <dish1>       <conditions pressure='x' temp='y'/>       <measurement timestamp='9am' reading='y'/>     </dish1>     </experiment> </test>

this xslt

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">    <xsl:output method="xml" indent="yes"/>     <xsl:template match="experiment">       <xsl:copy>          <xsl:apply-templates select="@*" />          <xsl:for-each-group select="*" group-by="local-name()">             <xsl:copy>                <xsl:apply-templates select="current-group()" />              </xsl:copy>          </xsl:for-each-group>       </xsl:copy>    </xsl:template>     <xsl:template match="experiment/*">       <observation>          <xsl:apply-templates select="*/@*" />       </observation>    </xsl:template>     <xsl:template match="@*|node()">       <xsl:copy>          <xsl:apply-templates select="@*|node()"/>       </xsl:copy>    </xsl:template>  </xsl:stylesheet>

this transformation working fine. but, if change below on xslt, then, getting error. idea?

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

i.e., on last match, have changed <xsl:apply-templates select="@*|node()"/> <xsl:apply-templates select="."/>

. means current node. when apply-templates ., you're applying them current context.

in case, template match test, output copy of it, , apply-templates itself. match again putting endless loop.

by doing apply-templates on node()|@*, you're applying templates child nodes , attributes.


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