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Asked: 2026-06-10T01:19:31+00:00

This is a slightly updated question that was originally posted here: XSL – Finding

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This is a slightly updated question that was originally posted here: XSL – Finding another nodes value using the value of the current context .
I have an XML that uses PackageID values to reference other nodes in the document.

I want to create a for-each loop for each CompositionPackage that has the Operation value of ‘Rasta’. Note: a CompositionPackage can have more than one Match.
I would like to use the result of the current node to then find the value of another node containing the returned PackageID value in the document.
In this case I want to get the value of SourcePackage/PackageName or MaterialPackage/PackageName or another CompositionPackage that has a matching PackageID value to that found in CompositionPackage/PackageTracks/TimelineTrack/TrackSegment/SourcePackageID.

Sample XML:

<AAG version="1.1">
<Preface>
  <ContentStorage>
      <SourcePackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
                <ComponentLength>5066</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>Name001</PackageName>
        <PackageID>urn:44f70006</PackageID>
      </SourcePackage>
      <MaterialPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
            <ComponentLength>804</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>Name010</PackageName>
        <PackageID>urn:44f70008</PackageID>
      </MaterialPackage>
      <CompositionPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
                <Operation>Rasta</Operation>
                <SourcePackageID>urn:44f70006</SourcePackageID>
                <ComponentLength>10099</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
          <TimelineTrack>
            <TrackSegment>
                <Operation>NotRasta</Operation>
                <SourcePackageID>urn:44f70007</SourcePackageID>
                <ComponentLength>100</ComponentLength>
            </TrackSegment>
          <TimelineTrack>
            <TrackSegment>
                <Operation>Rasta</Operation>
                <SourcePackageID>urn:44f70008</SourcePackageID>
                <ComponentLength>200</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>NameABC</PackageName>
        <PackageID>urn:ce1904fd</PackageID>
      </CompositionPackage>
      <CompositionPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
                <Operation>Rasta</Operation>
                <SourcePackageID>urn:00f70009</SourcePackageID>
                <ComponentLength>222</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>NameABC</PackageName>
        <PackageID>urn:ff1603fd</PackageID>
      </CompositionPackage>
      <CompositionPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
                <Operation>Rasta</Operation>
                <SourcePackageID>urn:11f80008</SourcePackageID>
                <ComponentLength>444</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>NameBCD</PackageName>
        <PackageID>urn:gg1702fj</PackageID>
      </CompositionPackage>
      <CompositionPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
                <Operation>Rasta</Operation>
                <SourcePackageID>urn:22f90009</SourcePackageID>
                <ComponentLength>555</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>NameXYZ</PackageName>
        <PackageID>urn:11f80010</PackageID>
      </CompositionPackage>
      <CompositionPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
                <Operation>NotRasta</Operation>
                <SourcePackageID>urn:22f90009</SourcePackageID>
                <ComponentLength>555</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>NameWWW</PackageName>
        <PackageID>urn:11f80008</PackageID>
      </CompositionPackage>
      <MaterialPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
            <ComponentLength>864</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>Name008</PackageName>
        <PackageID>urn:00f70009</PackageID>
      </MaterialPackage>
      <MaterialPackage>
        <PackageTracks>
          <TimelineTrack>
            <TrackSegment>
            <ComponentLength>864</ComponentLength>
            </TrackSegment>
          </TimelineTrack>
        </PackageTracks>
        <PackageName>Name002</PackageName>
        <PackageID>urn:22f70009</PackageID>
      </MaterialPackage>
  </ContentStorage>
</Preface>
</AAG>

Sample XSL:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" omit-xml-declaration="no" indent="yes"/>
<xsl:strip-space elements="*"/>

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

 <xsl:template match = "AAG">
 <Master>
 <xsl:for-each select="AAG/Preface/ContentStorage/CompositionPackage/PackageTracks/TimelineTrack/TrackSegment/Operation"> <!--whose Operation value is 'Rasta' -->
 <newnode>
   <value1><xsl:value-of select ="CompositionPackage/PackageTracks/TimelineTrack/TrackSegment/ComponentLength"/></value1>
   <value2><xsl:value-of select ="CompositionPackage/PackageTracks/TimelineTrack/TrackSegment/SourcePackageID"/></value2>
   <value3><xsl:value-of select ="CompositionPackage/PackageTracks/TimelineTrack/TrackSegment[SourcePackageID=current()/MaterialPackage/PackageName"/></value3>
 </newnode>
 </xsl:for-each>
 </Master>
 </xsl:template>
 </xsl:stylesheet>

Expected XML:

<Master>
<newnode>
  <Value1>1099</Value1>
  <Value2>urn:44f70006</Value2>
  <Value3>Name001</Value3>
</newnode>
<newnode>
  <Value1>200</Value1>
  <Value2>urn:44f70008</Value2>
  <Value3>Name010</Value3>
</newnode>
<newnode>
  <Value1>222</Value1>
  <Value2>urn:00f70009</Value2>
  <Value3>Name008</Value3>
</newnode>
<newnode>
  <Value1>444</Value1>
  <Value2>urn:11f80008</Value2>
  <Value3>NameWWW</Value3>
</newnode>
<newnode>
  <Value1>555</Value1>
  <Value2>urn:22f90009</Value2>
  <Value3>Name002</Value3>
</newnode>
</Master>

My Current XSL is returning “” for all value3 elements.

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1 Answer

  1. Editorial Team

    The error is obvious: inside a

    <xsl:for-each select=
"AAG
  /Preface
    /ContentStorage
      /CompositionPackage
         /PackageTracks/TimelineTrack/TrackSegment/Operation">

    You have:

    <xsl:value-of select =
 "CompositionPackage/PackageTracks/TimelineTrack/TrackSegment/ComponentLength"/>

    As an Operation element doesn’t have any CompositionPackage children (and in fact doesn’t have any element children at all), the above selects nothing and nothing is output.

    Exactly the same case for the other two xsl:value-of instructions inside the body of xsl:for-each

    There are contradictions between the provided XML document and the wanted result and there are data errors:

    1. There isn’t any PackageID element with value “urn:22f90009”. Therefore, in the last newnode in the provided result, Value3 must be empty — but in the provided result it has a non-empty string value.

    2. In the source XML document there are nested TimelineTrack elements.

    These issues explain why the transformation I came up with doesn’t exactly produce the wanted result:

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

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

      <xsl:template match = "AAG">
       <Master>
         <xsl:for-each select=
         "Preface
           /ContentStorage
            /CompositionPackage
               /PackageTracks
                 /TimelineTrack
                   /TrackSegment[Operation='Rasta']
         ">
             <newnode>
               <value1>
                  <xsl:value-of select="ComponentLength"/>
               </value1>
               <value2>
                 <xsl:value-of select="SourcePackageID"/>
           </value2>
               <value3>
                 <xsl:value-of select=
                  "../../../../*[self::SourcePackage
                       or self::MaterialPackage
                       or self::CompositionPackage]
                                    [PackageID
                                    =
                                    current()/SourcePackageID
                                    ]
                                    /PackageName
                     "/>
               </value3>
             </newnode>
       </xsl:for-each>
      </Master>
      </xsl:template>
</xsl:stylesheet>

    When this transformation is applied on the provided XML document:

    <AAG version="1.1">
    <Preface>
        <ContentStorage>
            <SourcePackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <ComponentLength>5066</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>Name001</PackageName>
                <PackageID>urn:44f70006</PackageID>
            </SourcePackage>
            <MaterialPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <ComponentLength>804</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>Name010</PackageName>
                <PackageID>urn:44f70008</PackageID>
            </MaterialPackage>
            <CompositionPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <Operation>Rasta</Operation>
                            <SourcePackageID>urn:44f70006</SourcePackageID>
                            <ComponentLength>10099</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                    <TimelineTrack>
                        <TrackSegment>
                            <Operation>NotRasta</Operation>
                            <SourcePackageID>urn:44f70007</SourcePackageID>
                            <ComponentLength>100</ComponentLength>
                        </TrackSegment>
                        <TimelineTrack>
                            <TrackSegment>
                                <Operation>Rasta</Operation>
                                <SourcePackageID>urn:44f70008</SourcePackageID>
                                <ComponentLength>200</ComponentLength>
                            </TrackSegment>
                        </TimelineTrack>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>NameABC</PackageName>
                <PackageID>urn:ce1904fd</PackageID>
            </CompositionPackage>
            <CompositionPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <Operation>Rasta</Operation>
                            <SourcePackageID>urn:00f70009</SourcePackageID>
                            <ComponentLength>222</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>NameABC</PackageName>
                <PackageID>urn:ff1603fd</PackageID>
            </CompositionPackage>
            <CompositionPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <Operation>Rasta</Operation>
                            <SourcePackageID>urn:11f80008</SourcePackageID>
                            <ComponentLength>444</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>NameBCD</PackageName>
                <PackageID>urn:gg1702fj</PackageID>
            </CompositionPackage>
            <CompositionPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <Operation>Rasta</Operation>
                            <SourcePackageID>urn:22f90009</SourcePackageID>
                            <ComponentLength>555</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>NameXYZ</PackageName>
                <PackageID>urn:11f80010</PackageID>
            </CompositionPackage>
            <CompositionPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <Operation>NotRasta</Operation>
                            <SourcePackageID>urn:22f90009</SourcePackageID>
                            <ComponentLength>555</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>NameWWW</PackageName>
                <PackageID>urn:11f80008</PackageID>
            </CompositionPackage>
            <MaterialPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <ComponentLength>864</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>Name008</PackageName>
                <PackageID>urn:00f70009</PackageID>
            </MaterialPackage>
            <MaterialPackage>
                <PackageTracks>
                    <TimelineTrack>
                        <TrackSegment>
                            <ComponentLength>864</ComponentLength>
                        </TrackSegment>
                    </TimelineTrack>
                </PackageTracks>
                <PackageName>Name002</PackageName>
                <PackageID>urn:22f70009</PackageID>
            </MaterialPackage>
        </ContentStorage>
    </Preface>
</AAG>

    the following result is produced:

    <Master>
    <newnode>
        <value1>10099</value1>
        <value2>urn:44f70006</value2>
        <value3>Name001</value3>
    </newnode>
    <newnode>
        <value1>222</value1>
        <value2>urn:00f70009</value2>
        <value3>Name008</value3>
    </newnode>
    <newnode>
        <value1>444</value1>
        <value2>urn:11f80008</value2>
        <value3>NameWWW</value3>
    </newnode>
    <newnode>
        <value1>555</value1>
        <value2>urn:22f90009</value2>
        <value3></value3>
    </newnode>
</Master>
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