https://www.w3schools.com/xml/xml_whatis.asp

XML is a software- and hardware-independent tool for storing and transporting data.

What is XML?

XML stands for eXtensible Markup Language XML is a markup language much like HTML XML was designed to store and transport data XML was designed to be self-descriptive XML is a W3C Recommendation XML Does Not DO Anything Maybe it is a little hard to understand, but XML does not DO anything.

This note is a note to Tove from Jani, stored as XML:

  <note>
  <to>Tove</to>
  <from>Jani</from>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
  </note>