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      <h1>abs</h1>
      <p>Returns the absolute value of a given number.
    Returns the same type as the supplied argument.</p>
      <p class="subhead">abs($arg as numeric?) &#8594; numeric?</p>
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                     <i>Arguments</i>
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               <p> </p>
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               <p>$arg</p>
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               <p>numeric?</p>
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               <p>The input value</p>
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                     <i>Result</i>
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               <p>numeric?</p>
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      <p class="subhead">Links to W3C specifications</p>
      <p>Namespace: http://www.w3.org/2005/xpath-functions</p>
      <p>Applies to: XPath 2.0, XSLT 2.0, XQuery 1.0 and later versions</p>
      <p>
            <a href="http://www.w3.org/TR/xpath-functions/#func-abs" class="bodylink">XPath 2.0 Functions and Operators</a>
         </p>
      <p>
            <a href="http://www.w3.org/TR/xpath-functions-30/#func-abs" class="bodylink">XPath 3.0 Functions and Operators</a>
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      <p class="subhead">Notes on the Saxon implementation</p>
      <p>The function is fully implemented according to the W3C specifications.</p>
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