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>