XSD Tutorials - Herong's Tutorial Examples - v5.23, by Herong Yang
Complex Element vs. Simple Element
This section describes what is a complex element and how to declare different types of complex elements.
What is a simple element? A simple element is an XML element that does not have any attributes or any sub (child) elements. A simple element can be declared with a simple datatype.
What is a complex element? A complex element is an XML element that have at least one attribute, or at least one sub (child) element. A simple element can be declared with a complex datatype.
Rule 1. A complex element must be declared by an Element Declaration Component with a complex datatype.
Rule 2. A complex datatype must be defined by a Complex Type Definition Component.
Rule 3. The XML representation of a Complex Type Definition Component is a "complexType" element.
Rule 4. A "complexType" element must have "name" attribute, if it is used to define a named datatype.
Rule 5. A "complexType" element may have the following possible sub elements:
Combine with what learn from other chapters in this book, now we know that there are 7 different types of elements with different ways to declare them:
Tutorial examples will be provided on how to declare element for each of the 7 types listed above in other sections in this chapter.
Table of Contents
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
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 vs. Simple Element
Declaring Complex Elements with Simple Content
Declaring Complex Elements with Attributes Only
Declaring Complex Elements with Sub Elements Only
Declaring Complex Elements with Attributes and Sub Elements
Declaring Complex Elements with Attributes, Sub Elements & Text Content
Using Shorthand for "complexContent" with "restriction"
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