Sitecore 8.x Custom Facet Patch File

gistfile1.txt

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <model>
      <elements>
        <element interface="MyNamespace.Facet.IContactPortalInfo, MyNamespace" implementation="MyNamespace.Facet.ContactPortalInfo, MyNamespace"/>
      </elements>
      <entities>
        <contact>
          <facets>
            <facet name="Payment" contract="MyNamespace.Facets.IContactPortalInfo, MyNamespace" />
          </facets>
        </contact>
      </entities>
    </model>
    <sessionSerialization>
      <allowedTypes>
        <type>
          MyNamespace.Facets.ContactPortalInfo, MyNamespace
        </type>
      </allowedTypes>
    </sessionSerialization>
  </sitecore>
</configuration>