How to pass URL field value to Zoho Creator XML RPC API

How to pass URL field value to Zoho Creator XML RPC API

How do I pass the value of an URL field to the Zoho Creator XML RPC API, e.g. to add a record? 

Regardless how I specify the URL, either as "naked" URL, as HTML link <a>, or as CDATA section, I'm always getting back an error "Failure, <field name>*Enter a URL value for <field name>"


Thank in advance!