What is XML?

Answer 1

Take a look at this Wikipedia link:
http://en.wikipedia.org/wiki/XML
Very good explanation indeed.

Answer 2

Short for Extensible Markup Language, a specification developed by the W3C. XML is a pared-down version of SGML, designed especially for Web documents. It allows designers to create their own customized tags, enabling the definition, transmission, validation, and interpretation of data between applications and between organizations.
Also see Understanding "Web Services" in the "Did You Know...?" section of Webopedia.

Answer 3

Take a look at this Wikipedia link:
http://en.wikipedia.org/wiki/xml...
Very good explanation are threre.

Answer 4

Prashant you can consider XML as a database engine. In simple words if you wanna design a website then what you will need is-->
- Template (A model for all of the pages on your website)
- CSS (for the look of your website)
- XML (for the content of your website)
In old days web designers used following tools for website design-->
- Template
- HTML
- CSS
- Content files (these files are collection of data that we need to frequently update like special offers and new news to our website viewers)
Content files are simple text files and the webdesigner uses some special symbols to easily grab the data from these files. Web designers uses language like Python, PHP, ASP, or Perl or any other text extraction lanuguage which can extract data from these content files. There is not any standard to design these content files, because this depends on the web designers.
To omit this inconsistency microsoft has designed a standard schema to describe data. Here is a example of XML file->
Consider you have display various information on your website and you have to pick some special information on one page and the same on the other page (in this case you don't need to design two different content files for two pages instead you can design one xml file and from this file you can extract the information what you need on particular page) like this->


Title of the page
Key words of your page
Code for your product
Name of your product
Type of your product
Version of your product

Path of the image
Link of the page

..............
..............
..............
..............


You can design your own tags to describe your data. You are not bound to use predefined tags like in HTML. Further I suggest you to read this tutorial http://www.w3schools.com/xml/default.asp. I am sure, you will learn a lot from this tutorial and 'll get each answer of your question here.