Definitions

   What Is XML?

XML (Extensible Markup Language) is a flexible way to create common information formats and share both the format and the data on the World Wide Web, intranets, and elsewhere. For example, computer makers might agree on a standard or common way to describe the information about a computer product (processor speed, memory size, and so forth) and then describe the product information format with XML. Such a standard way of describing data would enable a user to send an intelligent agent (a program) to each computer maker's Web site, gather data, and then make a valid comparison. XML can be used by any individual or group of individuals or companies that wants to share information in a consistent way.

• XML stands for EXtensible Markup Language
• XML is a markup language much like HTML
• XML was designed to carry data, not to display data
• XML tags are not predefined. You must define your own tags
• XML is designed to be self-descriptive
• XML is a W3C Recommendation

   What is extensible? 

• In information technology, extensible describes something, such as a program, programming language, or protocol, that is designed so that users or developers can expand or add to its capabilities. Extensibility can be a primary reason for the system, as in the case of the Extensible Markup Language (XML), or it may be only a minor feature.Approaches to extensibility include facilities (sometimes called hooks) for allowing users to insert their own program routines, the ability to define new data types, and the ability to define new formatting markup tags.

  

   what is ajax?

• AJAX = Asynchronous JavaScript and XML.
  
  

• AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.

• Classic web pages, (which do not use AJAX) must reload the entire page if the content should change.

• Examples of applications using AJAX: Google Maps, Gmail, Youtube, and Facebook tabs.

• AJAX stands for Asynchronous JavaScript and XML. AJAX is a new technique for creating better, faster, and more interactive web applications with the help of XML, HTML, CSS and Java Script.

what is UTF8?

• (Unicode Transformation Format-8) A format in the Unicode coding system that uses from one to four bytes. When coding the English language, only one byte is used per character like regular ASCII encoding. See Unicode and ASCII.

what is div?

• The <div> tag defines a division or a section in an HTML document.
• The <div> tag is used to group block-elements to format them with CSS.