<?xml version="1.0"?>
<html
xmlns:pwp="http://www.cs.otago.ac.nz/staffpriv/ok/pwp.pl">
<head><title>Example 2</title></head>
<body pwp:ask="Hello = 'Hello world', A = 20, B = 22">
<h1 pwp:use="Hello"/>
<p>The answer is <span pwp:tag='-' pwp:use="C" pwp:ask="C is A+B"/>.</p>
</body>
</html>