Question

How i can get via Xpath distinct child nodes name that the name mached mor than one time?

if these ish the xml:

> <el>
>     <name1></name1>
>     <name1></name1>
>     <name1></name1>
>     <name2></name2>
>     <name1></name1>
>     <name2></name2>
>     <name2></name2>
>     <name3></name3> </el>

the result:

name1
name2

not the name3

Answer 1

Grouping by checking along the sibling axis shows quadratic (slow) behaviour, when grouping in xslt 1 it’s almost always a good idea to use a key (known as Muenchian grouping)

<xsl:stylesheet version="1.0"
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform">


<xsl:template match="el">
 <xsl:for-each select="*[generate-id()=generate-id(key('n',name())[2])]">
  <xsl:value-of select="name()"/>
  <xsl:text> </xsl:text>
 </xsl:for-each>
</xsl:template>

<xsl:key name="n" match="*" use="name()"/>

</xsl:stylesheet>