Add a node in xml using java only if the node has an attribute

<xsl:value-of select="../Affiliation[@AFFID=current()/@AffiliationID]/OrgName"/>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
   <xsl:template match="/">
      <AUG>
         <xsl:for-each select="AuthorGroup/Author">
            <AU>
               <NAME>
                  <xsl:value-of select="./FamilyName"/>
                  <xsl:value-of select="./GivenName"/>
               </NAME>
               <AUINFO>
                  <xsl:value-of select="../Affiliation[@AFFID=current()/@AffiliationID]/OrgName"/>
               </AUINFO>
            </AU>
         </xsl:for-each>
      </AUG>
   </xsl:template>
</xsl:stylesheet>

<AUG>
   <AU>
      <NAME>SmithJohn</NAME>
      <AUINFO>Some Org</AUINFO>
   </AU>
   <AU>
      <NAME>AtkinsBill</NAME>
      <AUINFO>Another Org</AUINFO>
   </AU>
</AUG>

//w:style[w:name/@w:val = 'Peter']/@w:styleId

<xsl:key name="nameByVal" match="w:name" use="@w:val" />

key('nameByVal', 'Peter')/../@w:styleId

key('nameByVal', 'Peter')/ancestor::w:style/@w:styleId

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>

<xsl:key name="dataField" match="DataField" use="@name" />

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

<xsl:template match="/root">
    <xsl:copy>
        <xsl:apply-templates/>
        <xsl:apply-templates select="RegressionModel" mode="reg-tab"/>
    </xsl:copy>
</xsl:template>

<xsl:template match="RegressionModel" mode="reg-tab">
    <xsl:variable name="targetVariable" select="@targetVariable" />
    <xsl:variable name="targetCategory" select="ParamMatrix/PCell[1]/@targetCategory" />
    <xsl:for-each select="key('dataField', $targetVariable)/Value[@value != $targetCategory]">
        <RegressionTable targetVariable="{$targetVariable}" targetCategory="{@value}" />
    </xsl:for-each>
</xsl:template>

</xsl:stylesheet>

<?xml version="1.0" encoding="UTF-8"?>
<root>
   <DataDictionary>
      <DataField name="CLASS">
         <Value value="0" property="valid"/>
         <Value value="1" property="valid"/>
         <Value value="2" property="valid"/>
      </DataField>
      <DataField name="COUNTRY_CODE">
         <Value value="1" property="valid"/>
         <Value value="2" property="valid"/>
         <Value value="3" property="valid"/>
      </DataField>
      <DataField name="MARITAL_STATUS">
         <Value value="1" property="valid"/>
         <Value value="2" property="valid"/>
         <Value value="3" property="valid"/>
      </DataField>
   </DataDictionary>
   <RegressionModel targetVariable="CLASS">
      <ParamMatrix>
         <PCell name="COUNTRY_CODE" targetCategory="0" coefficient="12"/>
         <PCell name="MARITAL_STATUS" targetCategory="0" coefficient="34"/>
      </ParamMatrix>
   </RegressionModel>
   <RegressionTable targetVariable="CLASS" targetCategory="1"/>
   <RegressionTable targetVariable="CLASS" targetCategory="2"/>
</root>

try ( Transaction tx = graphDb.beginTx() )  {
    // operations on the graph
    // ...

    tx.success();
}

try (Transaction tx = db.beginTx()) {
    Node node = db.findNode(label, key, value);
    node.setProperty("k", 11);
    tx.success();
}