Using Elements Declared in Different Namespaces

This section describes a tutorial example on how to use imported element declarations from a different namespace.

In the previous section, we wrote a new schema called xhtml_import.xsd that imported elements declarations from another namespace: xmlns:xhtml="". The final schema document represented a single schema with declarations from multiple namespaces:

When writing XML documents to conform to a schema with multiple namespaces, you need to remember the following rules:

Here is a good example XML document, xhtml_import.xml, that conforms to xhtml_import.xsd:

<?xml version="1.0"?>
<book xmlns:xhtml="">
<!-- xhtml_import.xml
 - Copyright (c) 2002-2013 All Rights Reserved.

 <title>XML Schema Tutorials</title>
 <author>Herong Yang</author>

 <xhtml:p>What is XML Schema? ...</xhtml:p>
 <xhtml:pre>... schema code ...</xhtml:pre>


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 APIs

 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


 Archived Tutorials


 Full Version in PDF/EPUB