Question

I have an XML file that lists classes under a degree program. I have created a XSLT (with help) that successfully creates groups of classes under the degree name. But the client wants a third level that identifies elective and non-elective classes. The elective field is listed with the data “Y” if it is an elective and “N” if is not, or otherwise a “program requirement”.

I need to add another level to the XSLT that groups classes under a title “Program Requirement” if it has an “N” in the element <FlagElectives1>.

I think I need to create another key based on this element, right, and then create a template that creates a xsl:text title that says either: “Program Requirement” or “Program Elective” but I am stuck. I’ve never done three-level grouping before.

Here’s my XSLT:

<?xml version="1.0"?>
<!-- DWXMLSource="STX049 Catalog parsed.xml" -->
<!DOCTYPE xsl:stylesheet>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="no"/>
  <xsl:template match="/">

    <CrystalReport>
      <xsl:apply-templates/>
    </CrystalReport>
  </xsl:template>


  <xsl:key name="degrees-by-title" match="CrystalReport/Group/Group/Group/Details" use="Section/ICCB1" />

  <xsl:template match="CrystalReport/Group/Group/Group">

    <Degree>
      <xsl:for-each select="Details[count(. | key('degrees-by-title', Section/ICCB1)[1]) = 1]">
        <xsl:sort select="Section/ACADPROGRAMSID1" />
        <department>
          <Degreetitle>
            <xsl:apply-templates select="Section/ACPGDEGREE1" />
          </Degreetitle>
          <Certtitle>
            <xsl:apply-templates select="Section/CCD11" />
          </Certtitle>
          <DegreeDesc>
            <xsl:value-of select="Section/ACPGCOMMENTS1"/>
          </DegreeDesc>
          <ICCBcode>
            <xsl:value-of select="Section/ICCB1"/>
          </ICCBcode>
          <ProgramID>
            <xsl:value-of select="Section/ACADPROGRAMSID1"/>
          </ProgramID>
          <xsl:for-each select="key('degrees-by-title', Section/ICCB1)">
            <xsl:sort select="Section/FlagElectives1" order="ascending" />
            <xsl:sort select="Section/DEPARTMENT11" />
            <xsl:sort select="Section/CRSNO1" />

            <Details>
              <class>
                <deptname>
                  <xsl:value-of select="Section/DEPARTMENT11"/>
                </deptname>
                <courseno>
                  <xsl:value-of select="Section/CRSNO1"/>
                </courseno>
                <classname>
                  <xsl:value-of select="Section/CRSTITLE1"/>
                </classname>
                <classcredit>
                  <xsl:value-of select="Section/CRSMINCRED1"/>
                </classcredit>
                <Elective>
                  <xsl:value-of select="Section/FlagElectives1" />
                </Elective>
              </class>
            </Details>

          </xsl:for-each>
        </department>
      </xsl:for-each>
    </Degree>

  </xsl:template>

  <xsl:template match="Section/ACPGDEGREE1[child::node()]">
    <xsl:value-of select="."/>
    <xsl:text> DEGREE</xsl:text>
  </xsl:template>

  <xsl:template match="Section/CCD11[child::node()]">
    <xsl:text> CERTIFICATE</xsl:text>
  </xsl:template>


</xsl:stylesheet>

Here is the structure of my XML:

<?xml version="1.0" encoding="UTF-8"?>
<CrystalReport>
  <Group Level="1">
    <Group Level="2">
      <Group Level="3">
        <Details>
          <Section>
            <ACPGDEGREE1>AAS</ACPGDEGREE1>
            <CCD11/>
            <ACPGCOMMENTS1>The Accounting program</ACPGCOMMENTS1>
            <ICCB1>3203</ICCB1>
            <ACADPROGRAMSID1>ACCOU.AAS</ACADPROGRAMSID1>
            <CRSNO1>1110</CRSNO1>
            <ACRBPRINTEDSPEC1/>
            <ACPGHOMELANGNOTREQDRSN1>General Education</ACPGHOMELANGNOTREQDRSN1>
            <CRSMINCRED1>2</CRSMINCRED1>
            <ACPGAREAOFSTUDY1>Accounting</ACPGAREAOFSTUDY1>
            <CRSTITLE1>Using Computers: An Introduction</CRSTITLE1>
            <DEPARTMENT11>ACCOU</DEPARTMENT11>
            <CRSSUBJECT1>CIS</CRSSUBJECT1>
            <ACRBLABEL1>CIS REQUIREMENT</ACRBLABEL1>
            <CRSMAXCRED1/>
            <FlagElectives1>N</FlagElectives1>
          </Section>
        </Details>
        <Details>
          <Section>
            <ACPGDEGREE1>AAS</ACPGDEGREE1>
            <CCD11/>
            <ACPGCOMMENTS1>The Accounting program</ACPGCOMMENTS1>
            <ICCB1>3203</ICCB1>
            <ACADPROGRAMSID1>ACCOU.AAS</ACADPROGRAMSID1>
            <CRSNO1>1150</CRSNO1>
            <ACRBPRINTEDSPEC1/>
            <ACPGHOMELANGNOTREQDRSN1>General Education</ACPGHOMELANGNOTREQDRSN1>
            <CRSMINCRED1>3</CRSMINCRED1>
            <ACPGAREAOFSTUDY1>Accounting</ACPGAREAOFSTUDY1>
            <CRSTITLE1>Intro to Computer</CRSTITLE1>
            <DEPARTMENT11>ACCOU</DEPARTMENT11>
            <CRSSUBJECT1>CIS</CRSSUBJECT1>
            <ACRBLABEL1>CIS</ACRBLABEL1>
            <CRSMAXCRED1/>
            <FlagElectives1>Y</FlagElectives1>
          </Section>
        </Details>
      </Group>
    </Group>
  </Group>
</CrystalReport>

The first level of grouping should be based on the element <DEPARTMENT11>. The title of the various degrees and certificates is found in the field <ACPGAREAOFSTUDY1>
The second level unique field in all this is <ACADPROGRAMSID1>

Here is the desired output:

<CrystalReport>
 <Degrees>

 <!--group and repeat "Degrees" for-each based on element ACPGAREAOFSTUDY1-->

 <areaofstudy>Accounting</areaofstudy>
 <Degree>
 <department>

 <!--group and repeat "department" for-each based on element ICCB1-->

  <Degreetitle>AAS DEGREE</Degreetitle>
  <Certtitle />
  <DegreeDesc>The Accounting program</DegreeDesc>
  <ICCBcode>3203</ICCBcode>
  <ProgramID>ACCOU.AAS</ProgramID>

 <!--group and repeat "Details" for-each based on element ACADPROGRAMSID1 under titles "Program Requirement" or "Program Elective" based on element "FlagElectives1"-->

  <h1>Program Requirements</h1>
  <Details>
    <class>
      <deptname>ACCOU</deptname>
      <courseno>1150</courseno>
      <classname>Intro to Computer</classname>
      <classcredit>3</classcredit>
      <Elective>N</Elective>
    </class>
  </Details>
  <h1>Program Electives</h1>
  <Details>
    <class>
      <deptname>ACCOU</deptname>
      <courseno>1110</courseno>
      <classname>Using Computers: An Introduction</classname>
      <classcredit>2</classcredit>
      <Elective>Y</Elective>
    </class>
  </Details>
 </department>
 </Degree>
 <Degree>
 <department>
  <Degreetitle>AAS DEGREE</Degreetitle>
  <Certtitle />
  <DegreeDesc>The Accounting program</DegreeDesc>
  <ICCBcode>3203</ICCBcode>
  <ProgramID>ACCOU.AAS</ProgramID>
  <h1>Program Requirements</h1>
  <Details>
    <class>
      <deptname>ACCOU</deptname>
      <courseno>1150</courseno>
      <classname>Intro to Computer</classname>
      <classcredit>3</classcredit>
      <Elective>Y</Elective>
    </class>
  </Details>
  <h1>Program Electives</h1>
  <Details>
    <class>
      <deptname>ACCOU</deptname>
      <courseno>1110</courseno>
      <classname>Using Computers: An Introduction</classname>
      <classcredit>2</classcredit>
      <Elective>N</Elective>
    </class>
  </Details>
</department>
</Degree>
</Degrees>
</CrystalReport>

Answer 1

I did a bit of cleanup on your XSLT. Any time you have a for-each nested inside a for-each, that’s a good sign that your XSLT needs some refactoring. I think I’ve understood what you mean by grouping the courses by whether they are electives or not (though you haven’t indicated how you want to represent that), so what I came up with is the following:

<?xml version="1.0"?>
<!-- DWXMLSource="STX049 Catalog parsed.xml" -->
<!DOCTYPE xsl:stylesheet>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="no"/>
  <xsl:variable name="allSections" 
                select="/CrystalReport/Group/Group/Group/Details/Section" />

  <xsl:key name="kArea" match="Section" use="ACPGAREAOFSTUDY1"/>
  <xsl:key name="kDegree" match="Section" 
           use="concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1)" />
  <xsl:key name="kDepartment" match="Section" 
           use="concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1, '+', ICCB1)" />

  <xsl:variable name="degreeFirsts"
           select="$allSections[generate-id() = 
             generate-id(key('kDegree', 
                concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1))[1])]" />
  <xsl:variable name="deptFirsts"
             select="$allSections[generate-id() = 
               generate-id(key('kDepartment',
                concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1, '+', ICCB1))[1])]" />


  <xsl:template match="/">
    <CrystalReport>
      <Degrees>
        <xsl:apply-templates
          select="$allSections[generate-id() = 
                 generate-id(key('kArea', ACPGAREAOFSTUDY1)[1])]"
          mode="group"/>
      </Degrees>
    </CrystalReport>
  </xsl:template>

  <xsl:template match="Section" mode="group">
    <xsl:variable name="area" select="ACPGAREAOFSTUDY1" />
    <areaofstudy>
      <xsl:value-of select="$area"/>
    </areaofstudy>
    <xsl:apply-templates select="$degreeFirsts[ACPGAREAOFSTUDY1 = $area]" 
                         mode="degree"/>
  </xsl:template>

  <xsl:template match="Section" mode="degree">
    <xsl:variable name="area" select="ACPGAREAOFSTUDY1" />
    <xsl:variable name="degree" select="ACPGDEGREE1" />
    <xsl:text>&#xA;</xsl:text>
    <Degree>
      <xsl:apply-templates
        select="$deptFirsts[ACPGAREAOFSTUDY1 = $area and ACPGDEGREE1 = $degree]"
        mode="department">
        <xsl:sort select="ACADPROGRAMSID1" />
      </xsl:apply-templates>
    </Degree>
  </xsl:template>

  <xsl:template match="Section" mode="department">
    <department>
      <Degreetitle>
        <xsl:apply-templates select="ACPGDEGREE1" />
      </Degreetitle>
      <Certtitle>
        <xsl:apply-templates select="CCD11" />
      </Certtitle>
      <xsl:text>&#xA;</xsl:text>
      <DegreeDesc>
        <xsl:apply-templates select="ACPGCOMMENTS1" />
      </DegreeDesc>
      <xsl:text>&#xA;ICCB Code</xsl:text>
      <ICCBcode>
        <xsl:apply-templates select="ICCB1" />
      </ICCBcode>
      <xsl:text> | Field of Study Code: </xsl:text>
      <ProgramID>
        <xsl:apply-templates select="ACADPROGRAMSID1" />
      </ProgramID>
      <xsl:variable name="courses" 
              select="key('kDepartment', 
                   concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1, '+', ICCB1))" />

      <xsl:call-template name="CourseGroup">
        <xsl:with-param name="courses" select="$courses[FlagElectives1 = 'N']" />
        <xsl:with-param name="title" select="'Program Requirements'" />
      </xsl:call-template>

      <xsl:call-template name="CourseGroup">
        <xsl:with-param name="courses" select="$courses[FlagElectives1 = 'Y']" />
        <xsl:with-param name="title" select="'Program Electives'" />
      </xsl:call-template>
    </department>
  </xsl:template>

  <xsl:template name="CourseGroup">
    <xsl:param name="courses" />
    <xsl:param name="title" />

    <xsl:if test="$courses">
      <xsl:text>&#xA;</xsl:text>
      <xsl:value-of select="$title" />
      <xsl:apply-templates select="$courses">
        <xsl:sort select="FlagElectives1" order="ascending" />
        <xsl:sort select="DEPARTMENT11" />
        <xsl:sort select="CRSNO1" />
      </xsl:apply-templates>
    </xsl:if>
  </xsl:template>

  <xsl:template match="Section">
    <xsl:text>&#xA;</xsl:text>
    <Details>
      <class>
        <deptname>
          <xsl:apply-templates select="DEPARTMENT11" />
        </deptname>
        <xsl:text>    </xsl:text>
        <courseno>
          <xsl:apply-templates select="CRSNO1" />
        </courseno>
        <xsl:text>   </xsl:text>
        <classname>
          <xsl:apply-templates select="CRSTITLE1" />
        </classname>
        <xsl:text>    </xsl:text>
        <classcredit>
          <xsl:apply-templates select="CRSMINCRED1" />
        </classcredit>
      </class>
    </Details>
  </xsl:template>

  <xsl:template match="ACPGDEGREE1/text()">
    <xsl:value-of select="concat(., ' DEGREE')"/>
  </xsl:template>

  <xsl:template match="CCD11/text()">
    <xsl:value-of select="concat(., ' CERTIFICATE')" />
  </xsl:template>
</xsl:stylesheet>

The elective grouping is achieved through the call-template items, that select courses by whether or not they are electives:

  <xsl:variable name="courses" 
                select="key('degrees-by-title', ICCB1)" />
  <xsl:call-template name="CourseGroup">
    <xsl:with-param name="courses" select="$courses[FlagElectives1 = 'Y']" />
    <xsl:with-param name="title" select="'Program Requirements'" />
  </xsl:call-template>

When run on your sample input, this XSLT produces:

<CrystalReport>
  <Degree>
    <department>
      <Degreetitle>AAS DEGREE</Degreetitle>
      <Certtitle />
      <DegreeDesc>The Accounting program</DegreeDesc>
      <ICCBcode>3203</ICCBcode>
      <ProgramID>ACCOU.AAS</ProgramID>
      <h1>Program Requirements</h1>
      <Details>
        <class>
          <deptname>ACCOU</deptname>
          <courseno>1150</courseno>
          <classname>Intro to Computer</classname>
          <classcredit>3</classcredit>
          <Elective>Y</Elective>
        </class>
      </Details>
      <h1>Program Electives</h1>
      <Details>
        <class>
          <deptname>ACCOU</deptname>
          <courseno>1110</courseno>
          <classname>Using Computers: An Introduction</classname>
          <classcredit>2</classcredit>
          <Elective>N</Elective>
        </class>
      </Details>
    </department>
  </Degree>
</CrystalReport>

Note the h1 elements noting the start of the requirement and elective groups. If you would like this represented some other way, please clarify that.