xslt - Maintaining XML comments during XSL Transformations -

xml

<?xml-stylesheet type="text/xsl" href="script.xsl"?> <elements>   <stack>     <name>ray</name>     <status>0</status>   </stack> <!-- comment 1 -->   <things>   <!-- comment 2 -->     <thing>       <color>red</color>       <!-- state comment -->       <state>solid</state>       <!-- weight comment -->       <weight>45</weight>       <unit>34</unit>       <!-- comment 3 -->     </thing>  </things>  <favs>    <stick>ready</stick>    <!-- comment 4-->  </favs> </elements> 

expected output

<elements>   <stack>     <name>ray</name>     <status>0</status>   </stack>   <!-- comment 1 -->   <mainelements>   <!-- comment 2 -->     <specialthing>       <!-- weight comment -->       <propertyone>45</propertyone>       <propertytwo>red</propertytwo>       <!-- state comment -->       <propertythree>solid</propertythree>     </specialthing>   <!-- comment 3 -->   </mainelements>  <favs>      <stick>ready</stick>      <!-- comment 4-->  </favs> </elements> 

current xsl

<?xml version="1.0" encoding="utf-8" ?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/xsl/transform"version="1.0"> <xsl:output method="xml" indent="yes"/>  <xsl:template match="node()|@*">     <xsl:copy>         <xsl:apply-templates select="node()|@*"/>     </xsl:copy> </xsl:template>   <xsl:template match="things">         <mainelements>             <xsl:apply-templates select="thing"/>         </mainelements>     </xsl:template>   <xsl:template match="thing">     <specialthing>         <xsl:apply-templates select="weight"/>     <xsl:apply-templates select="color"/>     <xsl:apply-templates select="state"/>         </specialthing> </xsl:template>   <xsl:template match="weight">     <propertyone>        <xsl:value-of select="."/>        </propertyone> </xsl:template>  <xsl:template match="color">     <propertytwo>        <xsl:value-of select="."/>         </propertytwo> </xsl:template>  <xsl:template match="state">     <propertythree>        <xsl:value-of select="."/>         </propertythree> </xsl:template> </xsl:stylesheet> 

i not able indent output mentioned in output. main thing want achieve maintain comments of tags maintained in output.

eg: tag named weight renamed "propertyone" , value maintained in output. comment above same missing. want keep comment of same in output also. how can achieve that?

you'll have xsl:apply-templates preceding sibling comment()'s. since you're changing order of weight/color/state, you'll have add each 1 of templates.

also, matching comment 3 tricky , did might not work actual data.

xml input

<elements>     <stack>         <name>ray</name>         <status>0</status>     </stack>     <!-- comment 1 -->     <things>         <!-- comment 2 -->         <thing>             <color>red</color>             <!-- state comment -->             <state>solid</state>             <!-- weight comment 1 -->             <!-- weight comment 2 -->             <weight>45</weight>             <unit>34</unit>             <!-- comment 3 -->         </thing>     </things>     <favs>         <stick>ready</stick>         <!-- comment 4-->     </favs> </elements> 

xslt 1.0

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/xsl/transform" version="1.0">     <xsl:output method="xml" indent="yes"/>     <xsl:strip-space elements="*"/>      <xsl:template match="node()|@*">         <xsl:copy>             <xsl:apply-templates select="node()|@*"/>         </xsl:copy>     </xsl:template>       <xsl:template match="things">         <mainelements>             <xsl:apply-templates select="thing|comment()"/>         </mainelements>     </xsl:template>       <xsl:template match="thing">         <specialthing>             <xsl:apply-templates select="weight"/>             <xsl:apply-templates select="color"/>             <xsl:apply-templates select="state"/>                    </specialthing>         <xsl:apply-templates select="comment()[not(following-sibling::*)]"/>     </xsl:template>       <xsl:template match="weight">         <xsl:apply-templates select="preceding-sibling::comment()[generate-id(following-sibling::*[1])=generate-id(current())]"/>         <propertyone>             <xsl:value-of select="."/>         </propertyone>     </xsl:template>      <xsl:template match="color">         <xsl:apply-templates select="preceding-sibling::comment()[generate-id(following-sibling::*[1])=generate-id(current())]"/>         <propertytwo>             <xsl:value-of select="."/>         </propertytwo>     </xsl:template>      <xsl:template match="state">         <xsl:apply-templates select="preceding-sibling::comment()[generate-id(following-sibling::*[1])=generate-id(current())]"/>         <propertythree>             <xsl:value-of select="."/>         </propertythree>     </xsl:template>  </xsl:stylesheet> 

xml output

<elements>     <stack>         <name>ray</name>         <status>0</status>     </stack>     <!-- comment 1 -->     <mainelements>         <!-- comment 2 -->         <specialthing>             <!-- weight comment 1 -->             <!-- weight comment 2 -->             <propertyone>45</propertyone>             <propertytwo>red</propertytwo>             <!-- state comment -->             <propertythree>solid</propertythree>         </specialthing>         <!-- comment 3 -->     </mainelements>     <favs>         <stick>ready</stick>         <!-- comment 4-->     </favs> </elements>