There are some clueless people posting their ignorant opinions here, like some dude was hating on the guy that invented XML, sure XML might not be the best tool for everything but I can't see yaml or json to be better for documents, the thing XML was created for (but the guy probably has no idea what XML is, how it is used correctly), probably could be a good interview question to see who is inexperienced but has a giant ego and thinks he knows much.