What is XML?
In computing, Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
The design goals of XML emphasize simplicity, generality, and usability across the Internet. It is a textual data format with strong support via UTF‑8 for different human languages.
Although the design of XML focuses on documents, the language is widely used for the representation of arbitrary data structures.