I have a plain old XML document and an XML schema document. Is there a simple web app that can validate whether the former conforms to the latter? I'd rather not go with a heavy solution if I don't have to.
(Would someone retag this, please? I hate to be a bad tagger, but I don't have the rep to create new tags and all the relevant tags I can think of would be new.)
EDIT:
Great suggestions so far, but now I'm looking at a schema with include tags. Is there a web app that can handle those, or am I now asking too much?