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Thursday, May 17, 2012

Benefits of XML



XML Simplifies Data Sharing :-


  •  In the real world, computer systems and databases contain data in incompatible formats.
  • XML data is stored in plain text format. 
  • This provides a software- and hardware-independent way of storing data.
  • This makes it much easier to create data that can be shared by different applications.




XML Simplifies Data Transport :-


  • One of the most time-consuming challenges for developers is to exchange data between incompatible systems over the Internet.
  • Exchanging data as XML greatly reduces this complexity, since the data can be read by different incompatible applications.




XML Simplifies Platform Changes :-


  • Upgrading to new systems (hardware or software platforms), is always time consuming. Large amounts of data must be converted and incompatible data is often lost.
  • XML data is stored in text format. This makes it easier to expand or upgrade to new operating systems, new applications, or new browsers, without losing data.




XML Makes Your Data More Available:-


  • Different applications can access your data, not only in HTML pages, but also from XML data sources.
  • With XML, your data can be available to all kinds of "reading machines" (Handheld computers, voice machines, news feeds, etc), and make it more available for blind people, or people with other disabilities.
  • XML is Used to Create New Internet Languages
  • A lot of new Internet languages are created with XML.

Tuesday, May 15, 2012

XML- Introduction



XML stands for eXtensible Markup Language.
XML is designed to transport and store data.
XML is important to know, and very easy to learn.
XML is mostly used on the websites where data changes frequently but the format of data storage and display is the same.
For eg : Yahoo ! Cricket, Stock Market Websites are few to name.
Here Feeding the Information on regular basis will be a tedious work rather using XML to do the same work will save time.


XML Document Example


<?xml version="1.0"?>
<note>
    <to>Ram</to>
    <from>Peter</from>
    <heading>Reminder</heading>
    <body>Don't forget birthday party this weekend!</body>
</note>




  • XML was designed to transport and store data.
  • HTML was designed to display data.


What You Should Already Know
Before you continue you should have a basic understanding of the following:


  • HTML
  • JavaScript
How Can XML be Used?
  • It is used in many aspects of web development, often to simplify data storage and sharing.
  • It Separates Data from HTML
  • If you need to display dynamic data in your HTML document, it will take a lot of work to edit the HTML each time the data changes.(as mentioned at the start.)
  • With XML, data can be stored in separate XML files.
  •  This way you can concentrate on using HTML for layout and display, and be sure that changes in the underlying data will not require any changes to the HTML.
  • With a few lines of JavaScript code, you can read an external XML file and update the data content of your web page.