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   <title>string.subst</title><link rel="stylesheet" type="text/css" href="../reference.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.2"><link rel="home" href="../index.html" title="DocBook XSL Stylesheets: Reference&nbsp;Documentation"><link rel="up" href="generallibrary.html" title="General Library Templates"><link rel="prev" href="copy-string.html" title="copy-string"><link rel="next" href="xpointer.idref.html" title="xpointer.idref"><link rel="copyright" href="copyright.html" title="License"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">string.subst</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="copy-string.html">Prev</a>&nbsp;</td><th width="60%" align="center">General Library Templates</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="xpointer.idref.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="string.subst"></a><div class="titlepage"></div><div class="refnamediv"><h2>string.subst</h2><p>string.subst &#8212; Substitute one text string for another in a string</p></div><div class="refsect1"><a name="d0e33213"></a><h2>Description</h2><p>The <code class="function">string.subst</code> template replaces all
occurances of <em class="parameter"><code>target</code></em> in <em class="parameter"><code>string</code></em>
with <em class="parameter"><code>replacement</code></em> and returns the result.
</p><a name="string.subst.frag"></a><pre class="programlisting">
&lt;xsl:template name="string.subst"&gt;
  &lt;xsl:param name="string"&gt;&lt;/xsl:param&gt;
  &lt;xsl:param name="target"&gt;&lt;/xsl:param&gt;
  &lt;xsl:param name="replacement"&gt;&lt;/xsl:param&gt;

  &lt;xsl:choose&gt;
    &lt;xsl:when test="contains($string, $target)"&gt;
      &lt;xsl:variable name="rest"&gt;
        &lt;xsl:call-template name="string.subst"&gt;
          &lt;xsl:with-param name="string" select="substring-after($string, $target)"&gt;&lt;/xsl:with-param&gt;
          &lt;xsl:with-param name="target" select="$target"&gt;&lt;/xsl:with-param&gt;
          &lt;xsl:with-param name="replacement" select="$replacement"&gt;&lt;/xsl:with-param&gt;
        &lt;/xsl:call-template&gt;
      &lt;/xsl:variable&gt;
      &lt;xsl:value-of select="concat(substring-before($string, $target),                                    $replacement,                                    $rest)"&gt;&lt;/xsl:value-of&gt;
    &lt;/xsl:when&gt;
    &lt;xsl:otherwise&gt;
      &lt;xsl:value-of select="$string"&gt;&lt;/xsl:value-of&gt;
    &lt;/xsl:otherwise&gt;
  &lt;/xsl:choose&gt;
&lt;/xsl:template&gt;
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