Why can I validate the Global JXDM schemas with XMLSpy?
If you must use XMLSpy, do NOT use it for validation. XMLSpy demands too much overhead to load and examine imported and included files. The external schemas (such as NCIC-2000) are very large. If you want to use XMLSpy to view the model, then ensure you have unchecked (not checked) both options “Validate upon opening file” and “Validate upon saving file” in the Tools/Options/Files window.