xml schema validation error “prefix is not bound”

Question

I am entirely new to XML Schema and am trying to get the basics down. Here is my xml schema code (filename: example1.xsd):

Answer 1

In your XML, you either need to:

A. Remove the sample: prefix from sample:school

or

B. Change the xmlns="http://www.example.com" to xmlns:sample="http://www.example.com" and add the sample: prefix to the rest of the elements (, , etc.)