Question

I have an external setting file which has some nodes holiding attribute values of main xml document. I need to remove certian nodes from mian xml file if the attribute value is there in the setting file.

My setting file looks like this:

setting.xml

 <xml>
     <removenode titlename="abc" subtitlename="xyz"></removenode>
     <removenode titlename="dvd" subtitlename="dvd"></removenode>

 </xml>

Main.xml

<xml>
     <title titlename="abc">
         <subtitle subtitlename="xyz"></subtitle>
      </title>
      <title titlename="book">
          <subtitle subtitlename="book sub title"></subtitle>
      </title>
 </xml> 

Need a script which look for setting.xml file and remove the title element if titlename and subtitlename found in main.xml. The output should be

output.xml

 <xml>
      <title titlename="book">
          <subtitle subtitlename="book sub title"></subtitle>
      </title>
 </xml> 

I tried using document to read setting.xml file but not able to find how to do the match on main.xml file

 <xsl:variable name="SuppressionSettings" select="document('Setting.xml')" />
    <xsl:variable name="SuppressSetting" select="$SuppressionSettings/xml/removenode" />

.

Any hint how to implement it?

Answer 1

The key is to use an identity/copy pattern and, before each output, check the current (context) node isn’t prohibited by the suppression rules nodeset.

    <!-- get suppression settings -->
    <xsl:variable name='suppression_settings' select="document('http://www.mitya.co.uk/xmlp/settings.xml')/xml/removenode" />


    <!-- begin identity/copy -->

    <xsl:template match="node()|@*">
        <xsl:if test='not($suppression_settings[@titlename = current()/@titlename and @subtitlename = current()/subtitle/@subtitlename])'>
            <xsl:copy>
                <xsl:apply-templates select='node()|@*' />
            </xsl:copy>
        </xsl:if>
    </xsl:template>

You can run it here (see output source – the ‘abc’ title node is omitted):

http://www.xmlplayground.com/9oCYKp