<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE xs:schema [
<!ENTITY % p 'xs:'>
<!ENTITY % s ':xs'>
<!ENTITY % schemaAttrs "xmlns:map CDATA #IMPLIED
map:elementDefault CDATA #IMPLIED
map:builtinMap CDATA #IMPLIED
map:typeDefault CDATA #IMPLIED
map:attributeDefault CDATA #IMPLIED">
<!ENTITY % elementAttrs "map:to CDATA #IMPLIED
map:name CDATA #IMPLIED">
<!ENTITY % complexTypeAttrs "map:to CDATA #IMPLIED
map:name CDATA #IMPLIED">
]>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:map="http://www.cogsci.ed.ac.uk/~kari/schema-mapping" map:elementDefault="property" map:attributeDefault="property" map:typeDefault="individual" map:builtinMap="standardBuiltins.xml">

 <xs:element name="purchaseOrder" type="PurchaseOrderType" map:to="##nothing"/>

 <xs:element name="comment" type="xs:string"/>

 <xs:complexType name="PurchaseOrderType" mixed="false" map:name="PurchaseOrder">
  <xs:sequence>
   <xs:element name="shipTo" type="Address"/>
   <xs:element name="billTo" type="Address"/>
   <xs:element ref="comment" minOccurs="0"/>
   <xs:element name="items" type="Items" map:to="##nothing"/>
  </xs:sequence>
  <xs:attribute name="orderDate" type="xs:date"/>
 </xs:complexType>

 <xs:complexType name="Address" mixed="false">
  <xs:sequence>
   <xs:element name="name" type="xs:string"/>
   <xs:element name="street" type="xs:string"/>
   <xs:element name="city" type="xs:string"/>
   <xs:element name="state" type="xs:string"/>
   <xs:element name="zip" type="xs:decimal"/>
  </xs:sequence>
  <xs:attribute name="country" type="xs:NMTOKEN" use="optional" fixed="US"/>
 </xs:complexType>

 <xs:complexType name="Items" mixed="false" map:to="##nothing">
  <xs:sequence>
   <xs:element name="item" minOccurs="0" maxOccurs="unbounded">
    <xs:complexType mixed="false" map:name="Item">
     <xs:sequence>
      <xs:element name="productName" type="xs:string"/>
      <xs:element name="quantity">
       <xs:simpleType>
        <xs:restriction base="xs:positiveInteger">
         <xs:maxExclusive value="100"/>
        </xs:restriction>
       </xs:simpleType>
      </xs:element>
      <xs:element name="price" type="xs:decimal"/>
      <xs:element ref="comment" minOccurs="0"/>
      <xs:element name="shipDate" type="xs:date" minOccurs="0"/>
     </xs:sequence>
     <xs:attribute name="partNum" type="Sku"/>
    </xs:complexType>
   </xs:element>
  </xs:sequence>
 </xs:complexType>

 <xs:simpleType name="Sku">
  <xs:restriction base="xs:string">
   <xs:pattern value="\d{3}-[A-Z]{2}"/>
  </xs:restriction>
 </xs:simpleType>

</xs:schema>
