<v:validation-result xmlns:v="http://www.example.com/validation">
    <v:data>
        <user-info>
            <first-name>Tom</first-name>
            <last-name>Smith</last-name>
            <customer-number v:valid="false" v:alert="This customer number is unknown to the system">1234-4567-7890</customer-number>
        </user-info>
    </v:data>
    <v:global-errors>
        <v:global-error v:alert="The first and last name do not match an existing customer"/>
    </v:global-errors>
</v:validation-result>
