Connecting to an payment gateway service using XML

[RussellB]

Hi

I'm new to XML / XSLT CWP. Trying to put together a website with shopping cart. The client's existing payment gateway provider does have an XML service...

"You POST an XML document using your own valid SSL certificate."

Would that be using a FileMaker Export XML script???

Would you activate the script via a hidden attribute within a form?

"We then POST the resulting transaction in XML back to your web site."

How would this work with FileMaker?

Anyone able to help me understand how you would do this?

Thanks in advance.