Number of limits have values equal to users of different access levels. For instance, mailbox quota is a shared parameter, because its value is equal both for a customer and for subscription users. Graphically, the extension node can be represented in the following way:

The shared node is required. Data type: boolean.

Extension node sample

<property>
  <name>max_subdom</name>
  <type>int</type>
  <writable-by>admin</writable-by>
  <label>limit__max_subdom</label>
  <extension>
    <shared>false</shared>
  </extension>
</property>

For details on limits, refer to the sections Supported Operations: Managing Customer Accounts > Limits and Permissions , or Supported Operations: Managing Subscriptions > Subscription Settings > Limits, Permissions and Hosting Settings.