API Method convertLead Troubles

API Method convertLead Troubles

From the API docs, it appears that the xmlData parameter is optional in the convertLead API call. Furthermore, xmlData is only documented for adding a Potential. I have confirmed that it is in fact not optional, or at least the only way I can get convertLead to work is by adding a fake potential.
 
All I want to do is convert a lead to an account and a contact **without** a potential. How can this be done?
 
Conflicting Documentation:
 
1) In this section, the highlighted items are I assume required.
 
http://crm.zoho.com/crm/private/xml/Leads/convertLead?newFormat=1&apikey= API key&ticket=Ticket&leadId= entityId&xmlData= POTENTIALXMLDATA
 
2) In the table below and in the documentation, the (*) asterisked items conflict with the highlighted items in terms of mandatory requirement. The highlighted items are accurate as far as I can tell. In other words, xmlData ***is*** required.
 

Parameter

Data Type

Description

ticket*

String

 -

apikey*

String

 -

leadId*

String

Specify unique ID of the lead

xmlData

XML

Specify fields and corresponding values

newFormat*

Integer

newFormat=1: To exclude fields with "null" values while inserting data from your CRM account.
newFormat=2: To include fields with "null" values while inserting data from your CRM account.

* - Mandatory parameter