pasting the code into visual studio does nothing. It says,"no schema selcted". Also, this is not a full definition. What values are allowed?
Make things work the way you straight up said they would.

Closing this as there’s no context of the request, so submission is unfortunately not actionable. If you have an issues with provided documentation, please report details using http://aka.ms/spdev-issues.
Also please provide following details, so that we can investigate and react on your feedback.
- What code are you referring to?
- Where is this code located?
- Where in the VS are you pasting the code?
- Are you following some tutorials or what are you trying to do?
- What is not a “full definition”?
- What are the values you are referring to?
- Which VS version you are using?
Thanks for your submission and additional details advance, so that we can make things work the way they would.