What Is XSD (XML Schema Definition)

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∟XSD (XML Schema Definition) Introduction

∟What Is XSD (XML Schema Definition)

This section provides a quick introduction of XSD (XML Schema Definition) - a language that can be used to define a schema for XML documents.

What Is XSD (XML Schema Definition): XSD is a language that can be used to define a schema for XML documents. XSD itself is an XML based language. All XSD statements are written in XML format.

If an XML document is said to be valid against a XSD schema, all elements, attributes and entities in the XML document must meet their declared formats described in the XSD schema.

Main features of XSD:

XSD is an XML based language, meaning than XSD statements will be written in XML format.
One "schema" statement defines one schema.
Within the "schema" statement, "element", "simpleType", and "complexType" statements are included to define details of the schema.
XSD statements that define the schema can be included inside the XML file.
XSD statements that define the schema can be stored as a separate file and linked to the XML file.

Here is an example of XSD schema:

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

This example shows:

A schema is defined.
The element "p" is defined to have "string" as its text content with no sub elements and attributes.

Table of Contents

About This Book

Introduction of XML (eXtensible Markup Language)

XML File Syntax

XML File Browsers

XML-JSON Document Conversion

DOM (Document Object Model) Programming Interface

SAX (Simple API for XML) Programming Interface

DTD (Document Type Definition) Introduction

Syntaxes of DTD Statements

Validating an XML Document against the Specified DTD Document Type

►XSD (XML Schema Definition) Introduction

►What Is XSD (XML Schema Definition)

XML Files with Embedded XSD Statements

XML Files with Linked External XSD Files

Validating an XML File against a XSD Schema

Syntaxes of XSD Statements

Validating XML Documents Against Specified XML Schemas

XSL (Extensible Stylesheet Language) Introduction

Java Implementation of XSLT

XSLT (XSL Transformations) Introduction

XPath (XML Path) Language

XSLT Elements as Programming Statements

Control and Generate XML Element in the Result

PHP Extensions for XML Manipulation

Processing XML with Python Scripts

XML Notepad - XML Editor

XML Tools Plugin for Notepad++

XML Plugin Packages for Atom Editor

XML 1.1 Changes and Parsing Examples

Archived Tutorials

References

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