Extensible Markup Language, in translation Extensible marking language is a markup language similar to HTML, but without predefined tags to use. Instead, you define your own brands designed specifically for the client’s needs. It is an efficient way to store data in a format that can be saved, searched and shared.The basic XML format is standardized, so if you share or transmit XML across systems or platforms, either locally or over the Internet, the recipient can still parse the data thanks to the standardized XML syntax.