Including Old Schema Documents - Examples

This section describes a tutorial example on how to include an existing schema document and reuse its datatype definitions.

In the previous section, we wrote the "addressType" definition in "address.xsd". Now let's try to write a new schema that reuses this definition by using an "include" component.

The new schema, "address_us.xsd", will extend "addressType" to "addressUsType" by adding two more child elements:

<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <xsd:annotation>
  <xsd:documentation>address_us.xsd
 - Copyright (c) 2013, HerongYang.com, All Rights Reserved.
  </xsd:documentation>
 </xsd:annotation>

 <xsd:include schemaLocation="address.xsd">
  <xsd:annotation>
   <xsd:documentation>
    Borrowing the "addressType" definition 
   </xsd:documentation>
  </xsd:annotation>
 </xsd:include> 
 
 <xsd:element name="addressUs" type="addressUsType"/>

 <xsd:complexType name="addressUsType">
  <xsd:complexContent>
   <xsd:extension base="addressType">
    <xsd:sequence>
     <xsd:element name="state" type="xsd:string"/>
     <xsd:element name="zip" type="xsd:string"/>
    </xsd:sequence>
   </xsd:extension>
  </xsd:complexContent>
 </xsd:complexType>

</xsd:schema>

Notice that the "include" element is used to include the "address.xsd" into this new schema document. To test this new schema, you can try this XML document, "address_us.xml":

<?xml version="1.0"?>
<addressUs>
<!-- address_us.xml
 - Copyright (c) 2013, HerongYang.com, All Rights Reserved.
-->

 <street>1 Main Street</street>
 <city>New York</city>
 <state>NY</state>
 <zip>12345</zip>

</addressUs>

Last update: 2013.

Table of Contents

 About This Book

 Introduction to XML Schema

 XML Editor and Schema Processor - XMLPad

 Java API for XML Processing - JAXP

 JAXP - XML Schema (XSD) Validation

 Xerces2 Java Parser - Java API of XML Parsers

 Using Xerces2 Java API

 XML Schema Language - Basics

 Introduction of XSD Built-in Datatypes

 "string" and Its Derived Datatypes

 "decimal" and Its Derived Datatypes

 "dateTime" and Its Related Datatypes

 Miscellaneous Built-in Datatypes

 Facets, Constraining Facets and Restriction Datatypes

 "simpleType" - Defining Your Own Simple Datatypes

 Complex Element Declaration

 Identity-Constraints: unique, key and keyref

 Assertion as Custom Validation Rules

 XML Schema Location and Namespace in XML Documents

 Overriding Element Types in XML Documents

Linking Multiple Schema Documents Together

 Schema Component Reuse - "include", "redefine" or "import"

 Including Old Schema Documents - "include" Component

Including Old Schema Documents - Examples

 Including Old Schema Documents - Errors

 Redefining Old Datatypes - "redefine" Component

 Redefining Old Datatypes - XML Examples

 Redefining Old Datatypes - Errors

 Importing Declarations Across Namespaces - "import" Component

 Importing Declarations Across Namespaces - Examples

 Using Elements Declared in Different Namespaces

 Using Elements Declared in Different Namespaces - Errors

 Glossary

 References

 PDF Printing Version