Question

Hello I’m trying to create grouping in the pdf file
and I have to use grouping inside another grouping. f.e. group by date, then group by name, then by city…

xml:
<record>
<name>Palace1</name>
  <info>
     <date>2012-01-01</date> 
     <city>Random1</city> 
  </info>
  <info>
     <date>2012-01-01</date> 
     <city>SuperRandom</city> 
  </info>
  <info>
     <date>2012-01-02</date>
     <city>Random22</city>       
  </info>
   ...
</record>
<record>
<name>Palace2</name>
  <info>
    <date>2012-01-01</date>  
     <city>Random99</city>     
  </info>
  <info>
    <date>2012-01-02</date> 
     <city>Random1</city>     
  </info>
   ...
</record>
...

So lets say we need to group our records by date from 2012-01-01 to 2012-01-01 and the group them by name

Date 2012-01-01

Place1

Random1

SuperRandom

Palace2

Random99

Date 2012-01-02

Palace1

Random22

Palace2

Random1

SO I was using

<xsl:for-each-group select="dt:record" group-by="dt:info/dt:date">
<xsl:sort select="dt:date" order="ascending"/>

<fo:block font-weight="bold"> Date: <xsl:value-of select="format-dateTime(dt:date,'[Y0001].[M01].[D01]','en',(),'lt')"/></fo:block>

 <xsl:for-each select="current-group()"> //here im guessing we should put another for- each-group



 <xsl:for-each-group select="parent::dt:info/dt:record" group-by="dt:name">
 <fo:block>Place1 <xsl:value-of select="dt:name"><fo:block>
 <xsl:for-each select="current-group()">

 <fo:block> <xsl:value-of select="dt:info/dt:city"></fo:block>

 </xsl:for-each>
 </xsl:for-each-group>


</xsl:for-each>                 

</xsl:for-each-group>

but this doesn’t work… for some reason I get way more record names then I should

Answer 1

Here is how to do such groupings:

<xsl:stylesheet version="2.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:template match="/*">
     <xsl:for-each-group select="*/info" group-by="date">
        <xsl:sort select="date"/>
Date: <xsl:value-of select="date"/>

          <xsl:for-each-group select="current-group()" group-by="../name">
            <xsl:value-of select="concat('&#xA;  ',../name)"/>

            <xsl:for-each-group select="current-group()" group-by="city">
              <xsl:value-of select="concat('&#xA;    ', city)"/>
            </xsl:for-each-group>
          </xsl:for-each-group>
     </xsl:for-each-group>
 </xsl:template>
</xsl:stylesheet>

when this transformation is applied on the well-formed XML document derived from the non-wellformed provided XML:

<t>
    <record>
        <name>Palace1</name>
        <info>
            <date>2012-01-01</date>
            <city>Random1</city>
        </info>
        <info>
            <date>2012-01-01</date>
            <city>SuperRandom</city>
        </info>
        <info>
            <date>2012-01-02</date>
            <city>Random22</city>
        </info>    ... 
    </record>
    <record>
        <name>Palace2</name>
        <info>
            <date>2012-01-01</date>
            <city>Random99</city>
        </info>
        <info>
            <date>2012-01-02</date>
            <city>Random1</city>
        </info>    ... 
    </record>
</t>

the wanted, correctly-grouped result is produced:

Date: 2012-01-01
  Palace1
    Random1
    SuperRandom
  Palace2
    Random99
Date: 2012-01-02
  Palace1
    Random22
  Palace2
    Random1