Finally I've finished the first exercise of the course 'e-commerce technologies' where we had to create three xml-schema, one xml-example and an corresponding xslt-file which transforms the xml-file into a xhtml-file.
The following diagram shows the most interesting xsd-file (from my point of view). For a more detailed specification of this exercise, visit the following link: Specification. I've alo created a documentation where you can have a better overview of my solution. If you have ideas how to improve my solution feel free to post me.
Under the following link you can download my solution: e-commerce xml-exercise