XSD Tutorials - Herong's Tutorial Examples - Version 5.10, by Dr. Herong Yang

Facets, Constraining Facets and Restriction Datatypes

This chapter provides notes and tutorial examples on datatype facets, constraining facets and restriction datatypes. Topics include introduction of fundamental facets and constraining facets; constructing new user-defined datatypes by reducing constraining facets on a base datatypes; facets descriptions of 'string', 'dateTime' and 'decimal' built-in datatypes.

What Is Facet?

List of Facets

Constructing New Datatypes with Restriction Facets

Facets Supported in "string"

Facets Supported in "dateTime"

Facets Supported in "decimal"

Conclusion:

  • A facet on a datatype refers to a property of the datatype.
  • Every simple datatype has 4 fundamental facets: ordered, bounded, cardinality, numeric.
  • Every simple datatype has zero or more constraining facets: whiteSpace, length, minLength, maxLength, pattern, enumeration, maxInclusive, maxExclusive, minExclusive, minInclusive, totalDigits, fractionDigits, Assertions, explicitTimezone.
  • Constraining facets on a datatype can be modified to be more restrictive.
  • A new user-defined datatype can be constructed by modifying constraining facets of an existing datatype.
  • "string" and its derived datatypes have 7 constraining facets: whiteSpace, length, minLength, maxLength, pattern, enumeration, assertions.
  • "dateTime" and its related datatypes have 9 constraining facets: explicitTimezone, whiteSpace, pattern, enumeration, assertions, maxInclusive, maxExclusive, minInclusive, minExclusive.
  • "decimal" and its derived datatypes have 10 constraining facets: whiteSpace, pattern, enumeration, assertions, maxInclusive, maxExclusive, minInclusive, minExclusive, totalDigits, fractionDigits.

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

Facets, Constraining Facets and Restriction Datatypes - Updated in 2014, by Dr. Herong Yang