key function with different parameters : key « XSLT stylesheet « XML






key function with different parameters


File: Data.xml

<shirts>

  <colors>
   <color cid="c1">yellow</color>
   <color cid="c2">black</color>
   <color cid="c3">red</color>
   <color cid="c4">blue</color>
   <color cid="c5">purple</color>
   <color cid="c6">white</color>
   <color cid="c7">orange</color>
   <color cid="c7">green</color>
  </colors>

  <shirt colorCode="c4">item 1</shirt>
  <shirt colorCode="c1">item 2</shirt>
  <shirt colorCode="c6">item 3</shirt>

</shirts>

File: Transform.xslt

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0">
  <xsl:output method="text" />

  <xsl:key name="colorNumKey" match="color" use="@cid" />
  <xsl:key name="colorKey" match="color" use="." />

  <xsl:variable name="testVar">c4</xsl:variable>
  <xsl:variable name="keyName">colorKey</xsl:variable>

  <xsl:template match="colors">

    Looking up the color name with the color ID:

    c3's color:
    <xsl:value-of select="key('colorNumKey','c3')" />

    c4's color:
    <xsl:value-of select="key('colorNumKey',$testVar)" />

    c8's color:
    <xsl:value-of select="key('colorNumKey','c8')" />

    c7's colors:
    <xsl:for-each select="key('colorNumKey','c7')">
      <xsl:value-of select="." />
      <xsl:text> </xsl:text>
    </xsl:for-each>

    Looking up the color ID with the color name:

    blue's cid:
    <xsl:value-of select="key('colorKey','blue')/@cid" />

    black's cid:
    <xsl:value-of select="key($keyName,'black')/@cid" />

    gray's cid:
    <xsl:value-of select="key('colorKey','gray')/@cid" />

  </xsl:template>

  <xsl:template match="shirt" />

</xsl:stylesheet>

Output:



  

    Looking up the color name with the color ID:

    c3's color:
    red

    c4's color:
    blue

    c8's color:
    

    c7's colors:
    orange green 

    Looking up the color ID with the color name:

    blue's cid:
    c4

    black's cid:
    c2

    gray's cid:
    

  
  
  

 








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1.define and use key
2.match key
3.Use variable in key function