XML Schema Examples 

This topic contains the World Wide Web Consortium (W3C) purchase order examples. The first example is the schema for the purchase order. The second example is the instance document that is validated by this schema example.

Example: Purchase Order Schema

The following example shows a schema, po.xsd, that defines a purchase order. This example shows the use of element, and attribute declarations. This example also shows simpleType and complexType definitions.

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://tempuri.org/po.xsd" 
xmlns="http://tempuri.org/po.xsd" elementFormDefault="qualified">
 <xs:annotation>
  <xs:documentation xml:lang="en">
   Purchase order schema for Example.com.
   Copyright 2000 Example.com. All rights reserved.
  </xs:documentation>
 </xs:annotation>

 <xs:element name="purchaseOrder" type="PurchaseOrderType"/>

 <xs:element name="comment" type="xs:string"/>

 <xs:complexType name="PurchaseOrderType">
  <xs:sequence>
   <xs:element name="shipTo" type="USAddress"/>
   <xs:element name="billTo" type="USAddress"/>
   <xs:element ref="comment" minOccurs="0"/>
   <xs:element name="items"  type="Items"/>
  </xs:sequence>
  <xs:attribute name="orderDate" type="xs:date"/>
 </xs:complexType>

 <xs:complexType name="USAddress">
      <xs:annotation>
      <xs:documentation>
       Purchase order schema for Example.Microsoft.com.
       Copyright 2001 Example.Microsoft.com. All rights reserved.
      </xs:documentation>
      <xs:appinfo>
        Application info.
      </xs:appinfo>
     </xs:annotation>

  <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"
     fixed="US"/>
 </xs:complexType>

 <xs:complexType name="Items">
  <xs:sequence>
   <xs:element name="item" minOccurs="0" maxOccurs="unbounded">
    <xs:complexType>
     <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="USPrice"    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" use="required"/>
    </xs:complexType>
   </xs:element>
  </xs:sequence>
 </xs:complexType>

 <!-- Stock Keeping Unit, a code for identifying products -->
 <xs:simpleType name="SKU">
  <xs:restriction base="xs:string">
   <xs:pattern value="\d{3}-[A-Z]{2}"/>
  </xs:restriction>
 </xs:simpleType>

</xs:schema>

Example: Purchase Order Instance Document

The following example shows an instance document, po.xml, for the purchase order schema that is validated by po.xsd in the preceding example.

<?xml version="1.0"?>
<purchaseOrder xmlns="http://tempuri.org/po.xsd" orderDate="1999-10-20">
    <shipTo country="US">
        <name>Alice Smith</name>
        <street>123 Maple Street</street>
        <city>Mill Valley</city>
        <state>CA</state>
        <zip>90952</zip>
    </shipTo>
    <billTo country="US">
        <name>Robert Smith</name>
        <street>8 Oak Avenue</street>
        <city>Old Town</city>
        <state>PA</state>
        <zip>95819</zip>
    </billTo>
    <comment>Hurry, my lawn is going wild!</comment>
    <items>
        <item partNum="872-AA">
            <productName>Lawnmower</productName>
            <quantity>1</quantity>
            <USPrice>148.95</USPrice>
            <comment>Confirm this is electric</comment>
        </item>
        <item partNum="926-AA">
            <productName>Baby Monitor</productName>
            <quantity>1</quantity>
            <USPrice>39.98</USPrice>
            <shipDate>1999-05-21</shipDate>
        </item>
    </items>
</purchaseOrder>

See Also

Reference

XML Schemas (XSD) Reference
XML Schema Elements
XML Data Types Reference
Primitive XML Data Types
Derived XML Data Types

Concepts

Data Type Facets