xml - Combining multiple elements based on their children element values with XSLT -


alright xslt apparently beyond me , need please. haven't been able put multiple stack overflow posts exist 1 coherent, working section of code. have xml file has multiple entries this

<?xml version="1.0" encoding="utf-8"?>     <events>       <event>         <eventtype>blah</eventtype>         <title>blah blah</title>         <relatedlocations>blah</relatedlocations>         <date>friday, september 2, 2016</date>         <dateyear>2016</dateyear>         <datemonth>09</datemonth>         <dateday>02</dateday>         <body>derp</body>         <notes>notes not displayed public.</notes>       </event>       <event>         <eventtype>blah</eventtype>         <title>blah blah</title>         <relatedlocations>blah</relatedlocations>         <date>friday, october 7, 2016</date>         <dateyear>2016</dateyear>         <datemonth>09</datemonth>         <dateday>07</dateday>         <body>derp</body>         <notes>notes not displayed public.</notes>       </event>     </events>

and combine them based on titles being same , relatedlocations being same read this

<event>         <eventtype>blah</eventtype>         <title>blah blah</title>         <relatedlocations>blah</relatedlocations>         <date>friday, september 2, 2016, friday, october 7, 2016</date>         <dateyear>2016</dateyear>         <datemonth>09</datemonth>         <dateday>07</dateday>         <body>derp</body>         <notes>notes not displayed public.</notes>       </event>

the problem there other nodes in sheet totally different , same have different location. i'd if statement (i think?) checks whole document , same current node , concatenate dates 1 node , leave other nodes alone. code i've come with

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform">         <xsl:output encoding="utf-8" indent="yes" method="xml" />         <xsl:strip-space elements="*"/>      <xsl:key name="title" match="event/*" use="concat(../@id, '-', localname())"/>        <xsl:template match="node()|@*">             <xsl:copy>                     <xsl:apply-templates select="node()|@*"/>             </xsl:copy>     </xsl:template>         <xsl:for-each select="event/title">             <xsl:when test = "(@title = preceding::*/@title)">                 worked!             </xsl:when>         </xsl:for-each>         <xsl:template match="event">             <xsl:copy>                     <xsl:apply-templates select="@*" />                     <xsl:apply-templates select="title" />                     <xsl:apply-templates select="relatedlocations" />                     <xsl:apply-templates select="date" />                     <xsl:apply-templates select="dateyear" />                     <xsl:apply-templates select="datemonth" />                     <xsl:apply-templates select="dateday" />                     <xsl:apply-templates select="body" />                     <xsl:apply-templates select="ageranges" />             </xsl:copy>     </xsl:template>

which doesn't work. please , thank you.


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