<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
  targetNamespace="urn:example:orders"
  xmlns:o="urn:example:orders"
  elementFormDefault="qualified">
  <xs:simpleType name="NonEmptyText">
    <xs:restriction base="xs:token">
      <xs:minLength value="1"/>
    </xs:restriction>
  </xs:simpleType>
  <xs:element name="Order">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="CustomerId" type="o:NonEmptyText"/>
        <xs:element name="Quantity" type="xs:positiveInteger"/>
      </xs:sequence>
      <xs:attribute name="id" type="o:NonEmptyText" use="required"/>
    </xs:complexType>
  </xs:element>
</xs:schema>