Using the XML Schema Model APIs and adding on to the schema document created in Exercise 1: Create a root schema document, create a user-defined simple type called "USState" that has a primitive base type "string" and three enumeration facets called "AK","AL", and "AR".

<?xml version="1.0"?>
<schema
  targetNamespace="http://www.eclipse.org/xsd/examples/po"
  xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:po="http://www.eclipse.org/xsd/examples/po">
 
  <simpleType name="USState">
    <restriction base="string">
      <enumeration value="AK"/>
      <enumeration value="AL"/>
      <enumeration value="AR"/>
    </restriction>
  </simpleType>
  
</schema>
                                

New constructs created in this exercise:

• <simpleType> - Global simple type with name="USState"
• <enumeration> - Enumeration facets ("AK","AL", and "AR")