<?xml version="1.0" encoding="UTF-8"?>
<root>
<head>
  <base href="http://example.com/"></base>
</head>
<body xml:base="http://example.com/" prefix="pr: relative/iri#" xmlns:xpr="relative/uri#">
  <p property="pr:prop xpr:prop">value</p>
</body></root>