What is xml

Xml  "Extensible Markup Language", a metalanguage that allows users to define their own customized markup languages, esp. in order to display documents on the World Wide Web.

xml.

Example :

<?xml version="1.0" encoding="utf-8"?>

<Info>

  <account>

    <Name>Tom</Name>

    <LastName>Flinston</LastName>

    <adress>US</adress>

    <Email>tomflins@hotmail.com</Email>

  </account>

  <account>

    <Name>Simon</Name>

    <LastName>tat</LastName>

    <adress>France</adress>

    <Email>simontat@hotmail.com</Email>

  </account>

  <account>

    <Name>Peter</Name>

    <LastName>Jordan</LastName>

    <adress>England</adress>

    <Email>peterjor@hotmail.com</Email>

  </account>

</Info>

I find some video  that can help you to understand xml :