<?xml version="1.0" encoding="UTF-8"?>
<model>
  <entity name="heartbeat-display-policy" root="true">
    <entity-ref name="group" type="list" names="groups" />
  </entity>
  <entity name="group">
    <attribute name="id" value-type="String" />
    <attribute name="order" value-type="int" />
    <entity-ref name="metric" type="list" names="metrics" />
  </entity>
  <entity name="metric">
    <attribute name="id" value-type="String" />
    <attribute name="unit" value-type="String" />
    <attribute name="delta" value-type="boolean" />
    <attribute name="order" value-type="int" />
  </entity>
</model>