<html><head><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Functions on Boolean Values</title><link href="book.css" rel="stylesheet" type="text/css"><link href="../book.css" rel="stylesheet" type="text/css"><meta content="DocBook XSL Stylesheets V1.74.0" name="generator"><link rel="home" href="index.html" title="XPath 2.0 Processor User Manual"><link rel="up" href="ch03.html" title="How to use XPath 2.0 functions with PsychoPath"><link rel="prev" href="ch03s07.html" title="String Functions that Use Pattern Matching"><link rel="next" href="ch03s09.html" title="Component Extraction Functions on Durations, Dates and Times"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="Functions_on_Boolean_Values"></a>Functions on Boolean Values</h2></div></div></div><p><pre class="programlisting">not(true())</pre></p><p>from within a Java application, in order to extract the result
      from the result sequence, one would have to use this code:</p><p><pre class="programlisting">boolean n = ((XSBoolean)rs.first()).value();
println(n);</pre></p><p>in order to get the result of &lsquo;false&rsquo;</p></div></body></html>