Portable shopping cart add-in

Hi,

I'm working with a company to develop a portable shopping cart add-in. The company wants this to work with each of their client's shopping carts, which could be on different platforms and in different languages.

Can anyone think of any issues that my company needs to worry about? Has anyone worked with a lot of different shopping cart programs and have recommendations? I am thinking I should recommend they transfer their data back and forth using XML. Is this a likely scenario?

Thanks for any help you can provide!

Absolutely! By seperating the actual data from the content, you are not painting yourself into a corner. You should also seperate the presentation/styles from the content with CSS. Try to limit your code to using things based upon open standards. This way you probably won't run into a situation where you've relied on a proprietary technology that is no longer supported (e.g.: browser specific code, Java applets, etc.). K.I.S.S.