thanks for your replies. some very useful things to think about. I am just wondering whether i will need to expose anything as a web service as i will not be sharing any of our system with the other system, only they will be sharing certain data that is in their databases. Do i still have to expose certain functions as web services or is it mainly to do with the other systems. I know they have been built for interfacing with other systems, so does this mean i have to find out what services they have exposed and then program my application to interact with those web services?
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