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<h1>22. Virtuoso Functions Guide - contains</h1>
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<div id="text">
<h2>contains</h2>
<div class="refpurpose">Returns true if the first argument string contains the second argument string, and otherwise returns false.</div>
<div class="funcsynopsis">
<span class="funcdef">boolean <span class="function">contains</span>
</span>
(<span class="paramdef">
<span class="parameter">haystack</span> string</span>,
<span class="paramdef">
<span class="parameter">needle</span> string</span>);
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<div class="refsect1">
<div class="refsect1title">Description</div>
<p>
For two given strings, this function checks if the first string contains the second string.
If any argument is not a string, it is converted to string using rules from string() XPATH function.
Thus if the second argument has no string value, the function returns true, because it will
be converted to an empty string first.</p>
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<div class="refsect1title">Parameters</div>
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<span class="refsect2title">haystack – </span>
String where the search is performed</div>
<div class="refsect2">
<span class="refsect2title">needle – </span>
String to search</div>
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<p>Boolean</p>
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<pre class="screen">contains ('OpenLink Virtuoso', 'Link')</pre>
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