XML Schema Validation : Cannot find the declaration of element

Question

I am still a bit new to XML Schema etc. and have been working to develop some XML, Schema and a Stylesheet (XSLT). I have made reasonable progress, but then realized that my

Answer 1

Thanks to everyone above, but this is now fixed. For the benefit of others the most significant error was in aligning the three namespaces as suggested by Ian.

For completeness, here is the corrected XML and XSD

Here is the XML, with the typos corrected (sorry for any confusion caused by tardiness)

and, here is the Schema

Thanks again to everyone, I hope this is of use to somebody else in the future.