Binding Parameters of EXTSRV-PROCESS

Hi,

We are using adobe forms for PCR approval using the Business object method EXTSRV-PROCESS. This business object when entered in the task requires the follwing parameters as binding elements,

<b>Import parameters</b>

MODE

REQUEST_NO

DESCRIPTION

IFV

<b>Export Parameters</b>

PROCSTATE

From a few old SDN threads i found that the value for IFV can be 'A' or 'P' based on the requirement.I am unable to find the complete details about these parameters.Can anyone explain me the details of all these parameters particularly their use and possible values.

Thanks,

Prasath N