A request XML packet deleting a customer account from Plesk database includes the del operation node:
<packet version="1.6.3.0">
<customer>
<del>
...
</del>
</customer>
</packet>
The del node does not have a separate type, it is nested within the ClientTypeRequest complex type (client_input.xsd). The del node has the following graphics representation:

(client_input.xsd). For more information on filters, refer to the Available Filters section.