Dynamics 2013 – FetchXML now supports left outer joins

<fetch version="1.0" output-format="xml-platform" mapping="logical" distinct="false">
  <entity name="account">
    <attribute name="name" />
    <link-entity name="contact" from="parentcustomerid" to="accountid" link-type="outer">
      <attribute name="parentcustomerid" />
    </link-entity>
    <filter type='and'>
      <condition entityname="contact" attribute="parentcustomerid" operator="null"/>
    </filter>
  </entity>
</fetch>