Resources

Learn

• For a basic grounding in XML read through the Introduction to XML tutorial (developerWorks, August 2002).
  
  
• To see the definition of Document Type Definitions (DTDs), read the W3C's original XML 1.0 Recommendation (http://www.w3.org/XML/).
  
  
• Read the XML Schema Recommendation at the W3C site. It also includes an XML Schema Primer explaining the different options available to you (http://www.w3.org/XML/Schema).
  
  
• Read Kevin Williams' discussion of Why XML Schema beats DTDs hands-down for data (developerWorks, June 2001).
  
  
• Learn more about customizing a DTD with parameter entities (developerWorks, July 2002).
  
  
• Find out how to include external information with general entities (developerWorks, July 2002).
  
  
• Order XML Primer Plus , by Nicholas Chase, the author of this tutorial (http://www.amazon.com/exec/obidos/ASIN/0672324229/ref=nosim/thevanguardsc-20).
  
  
• Stay current with developerWorks technical events and Webcasts.
  
  

Get products and technologies

• Visit XML.org's registry of over 500 industry standard DTDs (http://www.xml.org/xml/industry_industrysectors.jsp).
  
  
• Visit XML.org's registry of industry standard schemas (http://www.xml.org/xml/registry.jsp).
  
  
• Download IBM's XML Schema Quality Checker from alphaWorks. It evaluates your schema documents for errors (http://www.alphaworks.ibm.com/tech/xmlsqc).
  
  
• Download the Java 2 SDK, Standard Edition version 1.4.2 (http://java.sun.com/j2se/1.4.2/download.html).
  
  
• Download JAXP 1.1, the Java APIs for XML Processing (http://java.sun.com/xml/xml_jaxp.html).
  
  
• If you're using an older version of Java technology, download the Apache project's Xerces-Java (http://xml.apache.org/xerces2-j/index.html) or Sun's Java API for XML Parsing (JAXP), part of the Java Web Services Developer Pack (http://java.sun.com/webservices/downloads/webservicespack.html).
  
  
• Download the the Xerces parser for C++ from the Apache XML project (http://xml.apache.org/xerces-c/index.html).
  
  
• Download the the Xerces parser for Perl from the Apache XML project (http://xml.apache.org/xerces-p/index.html).
  
  
• Build your next development project with IBM trial software, available for download directly from developerWorks.
  
  

Discuss

• Participate in the discussion forum.
  
  

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Table of contents

• Introduction
• Validation basics
• Validating a document
• Document Type Definitions (DTDs)
• XML Schema
• Validation summary
• Resources
• About the author

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