xml - XSLT to copy value in a node to another across repeating nodes -


very new xslt , needs in transforming xml. below xml can have multiple "row" tags

    <?xml version="1.0" encoding="utf-8"?>     <ns1:row>         <ns1:city>baltimore</ns1:city>         <ns1:miscdata>             <ns1:building>                 <ns1:vendorcode>123</ns1:vendorcode>                 <ns1:value>2</ns1:value>             </ns1:building>             <ns1:building>                 <ns1:vendorcode>345</ns1:vendorcode>                 <ns1:value>8</ns1:value>             </ns1:building>         </ns1:miscdata> </ns1:row>      <ns1:row>             <ns1:city>fremont</ns1:city>             <ns1:miscdata>                 <ns1:building>                     <ns1:vendorcode>332</ns1:vendorcode>                     <ns1:value>4</ns1:value>                 </ns1:building>                 <ns1:building>                     <ns1:vendorcode>342</ns1:vendorcode>                     <ns1:value>14</ns1:value>                 </ns1:building>                 <ns1:building>                     <ns1:vendorcode>323</ns1:vendorcode>                     <ns1:value>233</ns1:value>                 </ns1:building>             </ns1:miscdata>     </ns1:row>

the value in "vendorcode" tag in above xml needs copied "value" tag. output xml 

<?xml version="1.0" encoding="utf-8"?> <ns1:row>         <ns1:city>baltimore</ns1:city>         <ns1:miscdata>             <ns1:building>                 <ns1:vendorcode>123</ns1:vendorcode>                 <ns1:value>123</ns1:value>             </ns1:building>             <ns1:building>                 <ns1:vendorcode>345</ns1:vendorcode>                 <ns1:value>345</ns1:value>             </ns1:building>         </ns1:miscdata> </ns1:row> <ns1:row>         <ns1:city>fremont</ns1:city>         <ns1:miscdata>             <ns1:building>                 <ns1:vendorcode>332</ns1:vendorcode>                 <ns1:value>332</ns1:value>             </ns1:building>             <ns1:building>                 <ns1:vendorcode>342</ns1:vendorcode>                 <ns1:value>342</ns1:value>             </ns1:building>             <ns1:building>                 <ns1:vendorcode>323</ns1:vendorcode>                 <ns1:value>323</ns1:value>             </ns1:building>         </ns1:miscdata> </ns1:row>

all such tasks use template

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

as starting point, add template nodes need special treatment e.g. in case

<xsl:template match="ns1:building/ns1:value">   <xsl:copy>     <xsl:value-of select="preceding-sibling::ns1:vendorcode"/>   </xsl:copy> </xsl:template>

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