<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
 <s:Body>
  <u:<%=action.name %> xmlns:u="<%=action.service_type %>">
  <%= Enum.map(action.arguments, fn {k, v} -> %><<%=k %>><%=v %></<%=k %>><% end) %>
  </u:<%=action.name %>>
 </s:Body>
</s:Envelope>