<?xml version="1.0" encoding="UTF-8"?>
<ipo:completelyUnknownElement xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:ipo="http://www.example.com/IPO"
    xsi:noNamespaceSchemaLocation="xsi-type.xsd" xsi:type="xs:int">123456</ipo:completelyUnknownElement>
<!-- unknown element can be used with xsi:type cast -->
