(Required attribute) Contains the name of the resource file in the form template that contains the XML Schema for the input SOAP message of the selected operation of the Web service.
(Optional element) Defines one substitution group for a specific part of the input SOAP message.
Remarks
The input element is an optional element of the operation element.
Specified parts in the SOAP message are replaced when the form template is filled out with data from within the form. It is used when a secondary data source is populated from a Web service call and Microsoft Office InfoPath 2007 needs some input arguments to make the Web service calls.