concat() Function |
Takes all of its arguments and concatenates them. Any arguments that are not strings are converted to strings as if processed by the string() function.
Inputs
Two or more strings.
Output
The concatenation of all of the input strings.
Defined in
XPath section 4.2, String Functions.
Example
We'll use this XML file to demonstrate how concat() works:
    <?xml version="1.0"?>
    <list>
      <title>A few of my favorite albums</title>
      <listitem>A Love Supreme</listitem>
      <listitem>Beat Crazy</listitem>
      <listitem>Here Come the Warm Jets</listitem>
      <listitem>Kind of Blue</listitem>
      <listitem>London Calling</listitem>
      <listitem>Remain in Light</listitem>
      <listitem>The Joshua Tree</listitem>
      <listitem>The Indestructible Beat of Soweto</listitem>
    </list>
In our stylesheet, we'll use the concat() function to create filenames for various JPEG files. The filenames are composed from several pieces of information, concatenated by the concat() function:
    <?xml version="1.0"?>
    <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

      <xsl:output method="text"/>

      <xsl:variable name="newline">
    <xsl:text>
    </xsl:text>
      </xsl:variable>

      <xsl:template match="/">
        <xsl:value-of select="$newline"/>
        <xsl:for-each select="list/listitem">
          <xsl:text>See the file </xsl:text>
          <xsl:value-of select="concat('album', position(), '.jpg')"/>
          <xsl:text> to see the title of album #</xsl:text>
          <xsl:value-of select="position()"/>
          <xsl:value-of select="$newline"/>
        </xsl:for-each>
      </xsl:template>

    </xsl:stylesheet>
Our stylesheet generates these results:
    See the file album1.jpg to see the title of album #1
    See the file album2.jpg to see the title of album #2
    See the file album3.jpg to see the title of album #3
    See the file album4.jpg to see the title of album #4
    See the file album5.jpg to see the title of album #5
    See the file album6.jpg to see the title of album #6
    See the file album7.jpg to see the title of album #7
    See the file album8.jpg to see the title of album #8