What is the difference between using a URL & XML to communicate with a website's API? – Ebay API
I need to understand the big picture about how APIs work. For example, I can retreive a listing from ebay using a url like this: http://open.api.ebay.com/Shopping?callname=GetCategoryInfo&appid=************************************&siteid=3&CategoryID=-1&version=729&IncludeSelector=ChildCategories However much of the documentaion is about XML. I've never used XML before and…