XML/XSLT stylesheet/mod

if test="(position() mod

File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<cars>
  <manufacturer name="Chevrolet">
    <car>Cavalier</car>
    <car>Corvette</car>
    <car>Impala</car>
    <car>Malibu</car>
  </manufacturer>
  <manufacturer name="Ford">
    <car>Pinto</car>
    <car>Mustang</car>
    <car>Taurus</car>
  </manufacturer>
  <manufacturer name="Volkswagen">
    <car>Beetle</car>
    <car>Jetta</car>
    <car>Passat</car>
    <car>Touraeg</car>
  </manufacturer>
</cars>
File: Transform.xslt
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="text"/>
  <xsl:template match="/">
    <xsl:text>Automobile manufacturers and their cars&#xA;</xsl:text>
    <xsl:for-each select="cars/manufacturer">
      <xsl:value-of select="@name"/>
      <xsl:text>&#xA;</xsl:text>
      <xsl:for-each select="car">
        <xsl:text>  </xsl:text>
        <xsl:if test="(position() mod 2) = 0">
          <xsl:number count="manufacturer|car" level="multiple"
            format="1.1. "/>
        </xsl:if>
        <xsl:value-of select="."/>
        <xsl:text>&#xA;</xsl:text>
      </xsl:for-each>
    </xsl:for-each>
  </xsl:template>
</xsl:stylesheet>

Output:
omobile manufacturers and their cars
Chevrolet
  Cavalier
  1.2. Corvette
  Impala
  1.4. Malibu
Ford
  Pinto
  2.2. Mustang
  Taurus
Volkswagen
  Beetle
  3.2. Jetta
  Passat
  3.4. Touraeg

mod function

File: Data.xml
<?xml version="1.0"?>
<towns>
  <town>A</town>
  <town>B</town>
  <town>C</town>
  <town>D</town>
  <town>E</town>
  <town>F</town>
  <town>G</town>
  <town>H</town>
  <town>I</town>
  <town>J</town>
  <town>K</town>
  <town>L</town>
</towns>

File: Transform.xslt
<?xml version="1.0"?>
<xsl:stylesheet version="2.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="yes" />
  <xsl:param name="cols" select="4" />
  <xsl:template match="towns">
    <table>
      <xsl:for-each-group select="town"
        group-by="position() mod (last() idiv $cols)">
        <tr>
          <xsl:for-each select="current-group()">
            <td>
              <xsl:value-of select="." />
            </td>
          </xsl:for-each>
        </tr>
      </xsl:for-each-group>
    </table>
  </xsl:template>

</xsl:stylesheet>
Output:
ml version="1.0" encoding="UTF-8"?>
<table>
   <tr>
      <td>A</td>
      <td>D</td>
      <td>G</td>
      <td>J</td>
   </tr>
   <tr>
      <td>B</td>
      <td>E</td>
      <td>H</td>
      <td>K</td>
   </tr>
   <tr>
      <td>C</td>
      <td>F</td>
      <td>I</td>
      <td>L</td>
   </tr>
</table>