what is xml ?

Answer 1

HTML is a Markup Language which is used regarding the tags but XML stands for eXtensible Markup Language which is used to hold and process data.

Answer 2

XML is a markup language for documents containing structured information.

Structured information contains both content (words, pictures, etc.) and some indication of what role that content plays (for example, content in a section heading has a different meaning from content in a footnote, which means something different than content in a figure caption or content in a database table, etc.). Almost all documents have some structure.

A markup language is a mechanism to identify structures in a document. The XML specification defines a standard way to add markup to documents.

Answer 3

thanks @sachin kulkarni