XSD key/keyref beginner question

Question

I\'m trying to implement a very simple XML schema constraint.

The idref attribute on elements of type should only be

Answer 1

Your XML document, as shown, doesn't include a schemaLocation. When an XML document doesn't reference a schema or DTD, it may pass validation simply by being well-formed XML. (This once happened to a co-worker, using a different validator. I think it's a bug that the validator didn't at least give a warning that it was missing a schema or DTD. But I digress.)

Anyway, it should probably be something like:

  xsi:schemaLocation="test /path/to/schema/document"