<?xml version="1.0"?>
<form xmlns="http://www.demandware.com/xml/form/2008-04-19">

    <!-- fields for phone number -->
    <field formid="phone" label="profile.phone" description="address.phone.example" type="string" mandatory="true"
           binding="phone" min-length="10" max-length="20" missing-error="error.card.info.missing.phone" range-error="error.message.between10and20" />

</form>