<?xml version="1.0" encoding="UTF-8"?>
<wsp:Policy xmlns:wsp="http://www.w3.org/ns/ws-policy"
    xmlns:pa="http://ws-policy.example.com/assertion" >
    <wsp:ExactlyOne>
        <wsp:All>
            <pa:Assertion23 marker="23" />
            <pa:Assertion4 marker="4" />
        </wsp:All>
    </wsp:ExactlyOne>
</wsp:Policy>