Examples of XSD and XML Files with Errors

This section provides an example XML file associated with an example XML Schema file (XSD). The XML file contains some errors intentionally for see how XML validation tools report them.

In order to demonstrate how different XML validation programs report different types of validation errors, I wrote a more complex example XSD file, dictionary.xsd:

<?xml version="1.0"?>
<!-- dictionary.xsd
 - Copyright (c) 2014, HerongYang.com, All Rights Reserved.
-->
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <xsd:element name="dictionary" type="dictionaryType"/>
 <xsd:complexType name="dictionaryType">
  <xsd:sequence>
   <xsd:element name="word" type="wordType" maxOccurs="unbounded"/>
  </xsd:sequence>
 </xsd:complexType>
 <xsd:complexType name="wordType">
  <xsd:sequence>
   <xsd:element name="name" type="xsd:string"/>
   <xsd:element name="definition" type="definitionType" 
    maxOccurs="unbounded"/>
   <xsd:element name="update" type="updateType" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="acronym" type="xsd:boolean" use="optional"/>
  <xsd:attribute name="symbol" type="xsd:boolean" use="optional"/>
 </xsd:complexType>
 <xsd:complexType name="definitionType" mixed="true">
  <xsd:attribute name="reference" type="xsd:string"/>
 </xsd:complexType>
 <xsd:complexType name="updateType">
  <xsd:attribute name="date">
   <xsd:simpleType>
    <xsd:restriction base="xsd:string">
     <xsd:pattern value="\p{Nd}{4}-\p{Nd}{2}-\p{Nd}{2}"/>
    </xsd:restriction>
   </xsd:simpleType>
  </xsd:attribute>
 </xsd:complexType>
</xsd:schema>

Based on this XSD file, I wrote this invalid example XML file, dictionary_invalid_xsd.xml, with the XSD file associated through the "xsi" attribute:

<?xml version="1.0"?>
<!-- dictionary_invalid_xsd.xml
 - Copyright (c) 2014, HerongYang.com, All Rights Reserved.
-->
<dictionary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:noNamespaceSchemaLocation="dictionary.xsd">
 <word acronym="yes">
  <name>XML</name>
  <definition reference="Herong's Notes">eXtensible Markup 
Language.</definition>
  <update date="23-Dec-2003"/>
 </word>
 <word symbol="true">
  <name><</name>
  <definition>Mathematical symbol representing the "less than"
logical operation, like: 1<2.</definition>
  <definition>Reserved symbol in XML representing the beginning of 
tags, like: <![CDATA[<p>Hello world!</p>]]>
  </definition>
  <update editor="Herong Yang"/>
 </word>
 <word symbol="no" acronym="false">
  <name>extensible</name>
  <definition>Capable of being extended.</definition>
 </word>
</dictionary>

dictionary_invalid_xsd.xml does have several places that do not match rules defined in dictionary.xsd. We will see how different validation tools detect and report those errors.

Last update: 2014.

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

 Installing Xerces2 Java Parser for XSD 1.1

 Verifying Installation of Xerces2

 Xerces2 Sample Program List

 Xerces2 Sample Program dom.Counter

 dom.Counter Validating XML with Associated XSD

 dom.GetElementsByTagName and dom.Writer

 sax.DocumentTracer and sax.Writer

Examples of XSD and XML Files with Errors

 sax.Writer Reporting Errors Embedded in XML Structure

 XSD 1.1 not Supported by sax.Writer

 XSD 1.1 Supported by jaxp.SourceValidator

 Examples of XSD 1.1 and XML Files with Errors

 jaxp.TypeInfoWriter as an XSD 1.1 Validation Tool

 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

 Glossary

 References

 PDF Printing Version