XSD Tutorials - Herong's Tutorial Examples

∟Assertion as Custom Validation Rules

This chapter provides notes and tutorial examples on assertion validation rules. Topics include introduction of 'assert' validation rules for 'complexType' datatypes; 'assertion' validation rules for 'simpleType' datatypes; XPath expressions; $value representing current node value.

What Is an Assertion?

Assertion as the Forth Level Constraints

"assert" Statements for "complexType" Datatype

"assertion" Statements for "simpleType" Datatype

Conclusion:

• Assertions are introduced in XSD 1.1 to allow you to specify any validation rules that you can specify in XPath expressions.
• "assert" statements are used to declare assertions for "complexType" custom defined datatypes.
• "assertion" statements are used to declare assertions for "simpleType" custom defined datatypes.
• "$value" is used in XPath expression to represent the current node value.

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

 Glossary

 References

 PDF Printing Version