dom.Counter Validating XML with Associated XSD

This section provides a tutorial example on how to use the Xerces2 sample program called dom.Counter to validate XML documents with associated XSD schema files using the '-v -s' options.

To fully testing the XSD schema validation feature of dom.Counter, I need to create two files: hello.xsd and hello_xsd_invalid.xml:

>type hello.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <xsd:element name="p" type="xsd:string"/>
</xsd:schema>

>type hello_xsd_invalid.xml
<?xml version="1.0"?>
<p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="hello.xsd">
Hello <i>world</i>!</p>

Now run dom.Counter again with the "-s" option on hello_xsd_invalid.xml:

>jdk8x2r dom.Counter -s hello_xsd_invalid.xml

hello_xsd_invalid.xml: 251;6;0 ms (2 elems, 2 attrs, 0 spaces, 13 chars)

Surprise, where is the expected schema validation error? The sub element "i" is not defined in hello.xsd.

Checking the documentation of Xerces2 features again at the http://xerces.apache.org/xerces2-j/features.html again, I see that the schema validation feature (-s option) requires the basic validation feature (-v option) turned on to report errors:

>jdk8x2r dom.Counter -v -s hello_xsd_invalid.xml

[Error] hello_xsd_invalid.xml:4:24: cvc-type.3.1.2: Element 'p' is a 
^^^ simple type, so it must have no element information item 
^^^ [children].
hello_xsd_invalid.xml: 273;8;0 ms (2 elems, 2 attrs, 0 spaces, 
^^^ 13 chars)

Very good. dom.Counter does support XSD schema validation and report back errors, if you use "-v -s" options.

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