defining external functions

Hello,
Does anyone have any guidance on how to define external 
functions/services that are used in an RIF document? I make use of a 
CopyData
function that takes 3 arguments and someone suggest to me to use WSDL. 
Do you think that would work?
many thanks for your help,
adil

Received on Monday, 24 January 2011 21:15:10 UTC