Start Tag 

        End Tag 

       Empty Tag 

        XML Tags Rules 

XML - ELEMENTS

       Empty Element 

       XML Elements Rules

XML-Attributes

      Attribute Types

      Element Attribute Rules

XML-Comments

       XML Comments Rules

XML-Character Entities

      Types of  Character Entities

XML-CDATA Sections

      CDATA Rules

XML-Whitespaces

      Significant Whitespace 

      Insignificant Whitespace

XML-Processing

     Processing Instructions Rules

XML-Encoding

     Encoding Types

XML-Validation

  
     Well-formed XML Document

      Valid XML Document 

ADVANCE XML

     XML-DTDs 

     Internal DTD

     External DTD

     Types

XML-Schemas

     Definition Types 

XML-Tree Structure

XML-DOM