Basic

XML Tutorial

An eXtensible Markup Language is an abbreviation for XML. It is a markup language that can be extended (rather than a programming language). DTDs (Document Type Definitions) are also used in XML to specify the structure of the document. It comes from the Standard Generalized Markup Language (SGML). Computational processes and algorithms are not supported by XML. As a result, XML does not qualify as a programming language. The primary purpose is to convey data rather than to present data. XML is a language that bridges the gap between human and machine readability. XML tags, unlike HTML tags, are self-descriptive. The XML's filename extension is .xml.

Why do we need to learn XML?

XML has key qualities that make it helpful in a wide range of systems and solutions:

Simplicity - XML is simple to comprehend. You're in control of the tags and the overall layout of your document. The element tags are your own creation when writing a page in XML. You are free to create a system that meets your requirements. You'll also learn how human-readable the file is after you're familiar with fundamental XML grammar.
Organization - By segmenting the design process with XML, you may develop your platform. The data is kept on one page, while the formatting guidelines are kept on another. You can develop the data page first and then concentrate on the design if you have a general notion of what information you need to produce. Using XML, you may build the site in stages while staying organized.
Accessibility - You can categorize your work with XML. When data is separated, it is easier to retrieve when adjustments are required. If you write both parts in HTML, you'll end up with sections that combine the formatting instructions with the data you want to show on the page. Separating data with XML makes modifications simple and time-saving.
Standardization - Because XML is an international standard, your document can be seen by anybody in the world. XML allows you to have the entire world in your virtual garden.
Multiple application - Make a single data page that you may reuse over and over. XML allows you to generate multiple styles and formats from a single page of data.

Applications of XML

XML can ease the generation of HTML documents for huge websites by working behind the scenes.
Information can be sent between organizations and systems using XML.
Databases can be offloaded and reloaded using XML.
Different applications can access your data via XML data sources.
XML can be used to store and organize data, allowing you to tailor your data management needs.
XML and style sheets can readily be combined to create practically any desired output.

Example of XML code

<?xml version="1.0"?>
<message>
<body>Hello, How are you?</body>
</message>

An output of the above code is -

Prerequisites

To learn XML, you'll need a basic understanding of HTML tags and syntax. Working knowledge of Cascading Style Sheets (CSS), Dynamic HTML (DHTML), and Java applet technologies are required.

Target Audience

The XML course is intended for both beginners and experts professional like Administrator, Database Administrator, Developer, and Systems Administrator.