title: How to add multiple test conditions in 'test' attribute expression of <xsl:if> tag
body: <p>Is there any possibility  to include multiple conditions in 'test' attribute expression in <code>&lt;xsl:if&gt;</code> tag of XSLT like</p>
  
  <pre><code>&lt;xsl:if test="$var='ab' | $var='bc' | $var='ca' "&gt;
  &lt;/xsl:if&gt;
  </code></pre>
  
  <p>I am getting an error as
  "Expression must be evaluated to a node-set".</p>
  
  <p>Is there any possibility to code such multiple conditions in <code>&lt;xsl:if&gt;</code> Tag?</p>
  
  <p>Can anyone explain how can we achieve this multiple condition validation for the following tags in</p>
  
  <p><code>&lt;xsl:if&gt;</code> in test attribute expression</p>
  
  <p><code>&lt;xsl:for-each&gt;</code> in select attribute expression</p>
  
  <p><code>&lt;xsl:template&gt;</code> in match attribute expression</p>
  
  <p>?</p>