XML (eXtensible Markup Language) Introduction

What is XML?

  • It is a text-based markup language derived from Standard Generalized Markup Language (SGML).
  • XML tags represents the data and are used to store and organize the data.
  • XML tags are not used to specify how to display it like HTML tags are used to present the data.
  • XML is not going to replace HTML
  • XML Characteristics:
    • XML is extensible: Allows you to create your own self-descriptive tags to store the data.
    • XML is used to transport the data, does not present it: Allows you to store the data and not how it will be presented.
    • XML is a public standard: developed by World Wide Web Consortium (W3C) and is an open standard.
  • Sample XML:
    <student>
      <name>ABC</name>
      <class>12</class>
      <id>12</id>
      <grade>B</grade>
    </student>
    
  • XML is a markup language that defines set of rules for encoding documents in a format that is both human-readable and machine-readable.
  • XML above does not DO anything and just information wrapped in tags.
  • XML is used to carry data and focus on what data is. not like HTML is to display the data.
  • XML tags are not predefined.
  • XML Usage:
    • XML can work behind the scene to simplify the creation of HTML documents for large web sites.
    • XML can be used to exchange the information between organizations and systems.
    • XML can be used for offloading and reloading of databases.
    • XML can be used to store and arrange the data, which can customize your data handling needs.
    • XML can easily be merged with style sheets to create almost any desired output.
    • Virtually, any type of data can be expressed as an XML document.
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