What markup language is commonly used for sharing and storing data on the Web?

The markup language commonly used for sharing and storing data on the Web is XML (eXtensible Markup Language). XML is designed to be both human-readable and machine-readable, allowing for easy data interchange between systems. It provides a flexible way to create structured documents and enables users to define their own tags, making it highly versatile for various applications.

XML is particularly well-suited for data storage and sharing because it can represent complex data structures in a hierarchical format. This allows different kinds of data to be represented in a standardized way, which facilitates easier integration and communication between different platforms or technologies over the Web. Various applications, APIs, and web services utilize XML to transmit data, ensuring that information can be exchanged seamlessly.

HTML (Hypertext Markup Language) is primarily used for creating the structure and layout of web pages but is not specifically designed for data interchange. CSS (Cascading Style Sheets) is used for styling HTML documents and has no role in the storage or sharing of data. JSON (JavaScript Object Notation) is another format for data interchange but is not classified as a markup language, as it is a data format derived from JavaScript. While JSON is also widely used for sharing data, XML remains the classic markup language for this