XML Tutorial/XSLT stylesheet/parameter

A way how to recover the value of global variable which has the same name as a local one

   <source lang="xml">

File: Data.xml <?xml version="1.0" encoding="utf-8"?>

   <chapter>Chapter A</chapter>
   <chapter>Chapter B</chapter>
   <chapter>Chapter C</chapter>
   <chapter>Chapter D</chapter>

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:variable name="text">Chapter</xsl:variable>
   <xsl:template match="/">

<xsl:for-each select="//chapter"> </xsl:for-each>

<xsl:variable name="text"> <xsl:choose> <xsl:when test="position() = 1">First chapter</xsl:when> <xsl:when test="position()=last()">Last chapter</xsl:when> <xsl:otherwise> <xsl:value-of select="$text"/> </xsl:otherwise> </xsl:choose> </xsl:variable> <xsl:value-of select="$text"/> <xsl:text> : </xsl:text> <xsl:value-of select="."/>

   </xsl:template>

</xsl:stylesheet> Output:

<?xml version="1.0" encoding="UTF-8"?>

First chapter : Chapter A

Chapter : Chapter B

Chapter : Chapter C

Last chapter : Chapter D

</source>

Define parameter

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <!DOCTYPE catalog SYSTEM "price.dtd"> <catalog>

<item id="SC-0001">
 <maker>A</maker>
 <description>W</description>
 <size>L</size>
 <price>120.00</price>
 <currency>USD</currency>
</item>

</catalog>

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="xml" indent="yes" />
 <xsl:output doctype-system="catalog.dtd" />
 <xsl:param name="discount" select="0.10" />
 <xsl:template match="catalog">
   <xsl:copy>
     <xsl:apply-templates select="item" />
   </xsl:copy>
 </xsl:template>
 <xsl:template match="item">
   <xsl:copy>
     <xsl:attribute name="id"><xsl:value-of select="@id" />
     </xsl:attribute>
     <xsl:copy-of select="maker|description|size|price" />
     <discount>
       <xsl:value-of select="$discount" />
     </discount>
     <discountPrice>
       <xsl:value-of select="price - (price * $discount)" />
     </discountPrice>
     <xsl:copy-of select="currency" />
   </xsl:copy>
 </xsl:template>

</xsl:stylesheet> Output: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE catalog

 SYSTEM "catalog.dtd">

<catalog>

  <item id="SC-0001">
     <maker>A</maker>
     <description>W</description>
     <size>L</size>
     <price>120.00</price>
     <discount>0.1</discount>
     <discountPrice>108</discountPrice>
     <currency>USD</currency>
  </item>

</catalog></source>

If you want to pass a variable, you have to define this variable with xsl:param element.

   <source lang="xml">

File: Data.xml <?xml version="1.0" encoding="utf-8"?>

   <number>1</number>
   <number>3</number>
   <number>4</number>
   <number>17</number>
   <number>8</number>

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:template match="/">

<xsl:for-each select="//number"> </xsl:for-each> </TABLE> </xsl:template> <xsl:template match="number"> <xsl:param name="type">even</xsl:param> <xsl:value-of select="."/> <xsl:text> (</xsl:text> <xsl:value-of select="$type"/> <xsl:text>)</xsl:text> </xsl:template> </xsl:stylesheet> Output: <?xml version="1.0" encoding="UTF-8"?>

<xsl:choose> <xsl:when test="text() mod 2"> <xsl:apply-templates select="."> <xsl:with-param name="type">odd</xsl:with-param> </xsl:apply-templates> </xsl:when> <xsl:otherwise> <xsl:apply-templates select="."/> </xsl:otherwise> </xsl:choose> </TH>

<TR><td>3 (odd)</TH></TR><TR><td>4 (even)</TH></TR><TR><td>17 (odd)</TH></TR><TR><td>8 (even)</TH></TR></TABLE></source>

setting xsl:param

   <source lang="xml">

File: Data.xml <?xml version="1.0" encoding="utf-8"?>

   <chapter>Chapter A</chapter>
   <chapter>Chapter B</chapter>
   <chapter>Chapter C</chapter>
   <chapter>Chapter D</chapter>

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:param name="totalChapters" select="count(//chapter)"/>
   <xsl:template match="/">

1 (odd)</TH>

<xsl:for-each select="//chapter"> </xsl:for-each>

<xsl:value-of select="."/> <xsl:text> (</xsl:text> <xsl:value-of select="position()"/> <xsl:text>/</xsl:text> <xsl:value-of select="$totalChapters"/> <xsl:text>)</xsl:text>

   </xsl:template>

</xsl:stylesheet> Output:

<?xml version="1.0" encoding="UTF-8"?>

Chapter A (1/4)

Chapter B (2/4)

Chapter C (3/4)

Chapter D (4/4)

</source>

template with parameter

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <catalog>

<item id="SC-0001">
 <maker>factory</maker>
 <description>car part</description>
 <size>L</size>
 <price>120.00</price>
 <currency>USD</currency>
</item>

</catalog>

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="xml" indent="yes" />
 <xsl:output doctype-system="catalog.dtd" />
 <xsl:template match="catalog">
   <xsl:copy>
     <xsl:apply-templates select="item">
       <xsl:with-param name="discount" select=""0.50"" />
     </xsl:apply-templates>
   </xsl:copy>
 </xsl:template>
 <xsl:template match="item">
   <xsl:param name="discount" />
   <xsl:copy>
     <xsl:attribute name="id"><xsl:value-of select="@id" />
     </xsl:attribute>
     <xsl:copy-of select="maker|description|size|price" />
     <discount>
       <xsl:value-of select="$discount" />
     </discount>
     <discountPrice>
       <xsl:value-of select="price - (price * $discount)" />
     </discountPrice>
     <xsl:copy-of select="currency" />
   </xsl:copy>
 </xsl:template>

</xsl:stylesheet> Output: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE catalog

 SYSTEM "catalog.dtd">

<catalog>

  <item id="SC-0001">
     <maker>factory</maker>
     <description>car part</description>
     <size>L</size>
     <price>120.00</price>
     <discount>0.50</discount>
     <discountPrice>60</discountPrice>
     <currency>USD</currency>
  </item>

</catalog></source>

Variable and parameter

   <source lang="xml">

File: Transform.xslt <?xml version="1.0"?> <xsl:stylesheet version="1.0"

 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output method="text" />
 <xsl:param name="startX" />
 <xsl:param name="baseColor" />
 <xsl:variable name="newline">
   <xsl:text></xsl:text>
 </xsl:variable>
 <xsl:template match="/">
   <xsl:value-of select="$newline" />
   <xsl:text>Global parameters example</xsl:text>
   <xsl:value-of select="$newline" />
   <xsl:value-of select="$newline" />
   <xsl:text>The value of startX is: </xsl:text>
   <xsl:value-of select="$startX" />
   <xsl:value-of select="$newline" />
   <xsl:text>The value of baseColor is: </xsl:text>
   <xsl:value-of select="$baseColor" />
   <xsl:value-of select="$newline" />
 </xsl:template>

</xsl:stylesheet> Output: Global parameters exampleThe value of startX is: The value of baseColor is:</source>