XML is "Extensible Markup Language" in which the user can store, transport and exchange data. XML concentrates only on what data means unlike HTML concentrating on Layout also.

When a Client sends any request in an application, XML Document is loaded by the Web Server Control which inturn forwards to the Application Server. The application server then checks in XML Databases like XML Enabled Relational Database and Native XML Non-Relational Database.

=> The XML recommendations as an XML element has a physical structure and a logical structure. Now XML was originally developed to create printed documents, and printed documents often have images, headings and text in them. Computers doesn't have that capability of finding elements in that particular page. To overcome the problem, XML can introduced that make the computer understand about the data present in the document. => It is also common to take a document and factor it up into multiple files to make the document compatible on various devices. It's the physical structure of the XML document that ties all those pieces together. XML DTD or Document Type Definition is part of the physical structure of the XML document which can be used to define the physical structure of the XML document.

XML is very easy to learn and SPLessons XML Tutorial was prepared to make the readers to understand the basic to advanced topics in simple and easy steps with well explained examples. Before going to XML, one should have a basic knowledge on

• XML is Extensible Markup Language.
• XML stores, transports and exchanges data.