What's XML feed: Web service, RSS feed or something else?

>I'm new to XML and I'm charged with the task of creating a very simple XML feed with an order number and a UPS tracking number. As we ship products through out the day I'll add records to the feed.
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>I think I understand the foxpro CURSORTOXML function, but this sounds like it will write the entire cursor to the XML file. Is there a better way to do this? -Thanks!