XSLT: Add content to an XML depending on conditions -

i trying transform xml-file xml-file, content added in case not provided.

my xml looks this:

<bookstore>    <book>         <title>book1</title>         <author>author1</author>         <chapters>              <chapter>                   <ch-name>blabla</ch-name>                   <ch-number>1</ch-number>              </chapter>         </chapters>    </book>    <book>         <title>book2</title>         <author>author2</author>         <chapters>              <chapter>                   <ch-name>test</ch-name>                   <ch-number>1</ch-number>              </chapter>         </chapters>    </book>    <book>         <title>book3</title>         <author>author3</author>    </book> </bookstore> 

now, want add chapters element (and child elements) books, doesn't exist already, create sort of default.

my xslt looks this:

<dns:template match="book[not(exists(chapters))]">     <xsl:copy>       <xsl:apply-templates select="@*|*"/>     </xsl:copy>     <chapters>            <chapter>                 <ch-name>default</ch-name>                 <ch-number>default</ch-number>             </chapter>     </chapters>    </dns:template>  <xsl:template match="@* | *">     <xsl:copy>         <xsl:apply-templates select="@* | * | text()"/>     </xsl:copy> </xsl:template> 

however, when try in online editor, there no changes. dns namespace should support not(exists) part.

is there wrong xslt?

thank given!

change "dns" prefix "xsl"(of course can have prefix defined again same namespace, not recommended). if using xslt1.0, there no "exists()" function present. also, "chapters" needs inside . can use xslt:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/xsl/transform"> <xsl:output method="xml" indent="yes"/> <xsl:strip-space elements="*"/> <xsl:template match="book[not(chapters)]">     <xsl:copy>         <xsl:apply-templates select="@*|*"/>         <chapters>             <chapter>                 <ch-name>default</ch-name>                 <ch-number>default</ch-number>             </chapter>         </chapters>     </xsl:copy>  </xsl:template>  <xsl:template match="@* | *">     <xsl:copy>         <xsl:apply-templates select="@* | * | text()"/>     </xsl:copy> </xsl:template> </xsl:stylesheet>