Self-describing XML

Globally scoped XML data requires more precision:

<?xml version="1.0"?>
<foaf:Person soapenc:href="http://www.w3.org/People/all#eric"
             foaf:first="Eric"
             foaf:surname="Prud'hommeaux"
             xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
             xmlns:foaf="http://xmlns.com/foaf/0.1/">
  <foaf:mbox soapenc:href="mailto:eric+talk@w3.org"/>
</foaf:Person>