Setting default values for AIF Document Services

Hi,

Can anyone tell me where you would go about setting default values for AIF document services?

The defaults should only be applicable to records being created using the Document Services?

I have attempted to use the prepareToSaveExtended() method of Axd class but this hasn’t seemed to work.

Has anyone successfully managed to set default values, if so how did they achieve it?

Many thanks,

Nick