<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://www.w3.org/A-namespace" 
	   xmlns:xs="http://www.w3.org/2001/XMLSchema" 
	   xmlns:an="http://www.example.com/A-namespace" 
	   elementFormDefault="qualified" 
	   attributeFormDefault="unqualified">
  <xs:element name="data">
    <xs:complexType>
      <xs:sequence>
	<xs:element name="my_element" type="xs:negativeInteger"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>