XHTML (Extensible Hypertext Markup Language) is a markup language that is a stricter and cleaner version of HTML. It is designed to be a more robust and well-formed language, adhering to XML (Extensible Markup Language) standards. This means that XHTML documents must follow specific rules regarding syntax, such as proper nesting of elements, mandatory closing tags, and proper attribute quoting. The goal of XHTML is to create web pages that are more consistent and easier to parse by machines, leading to improved accessibility and interoperability across different browsers and platforms. XHTML was intended to replace HTML, but HTML5 has become the dominant standard. However, XHTML is still used in some contexts, particularly where strict XML compliance is required or preferred. XHTML documents are typically used for creating web pages, web applications, and other types of online content. They can contain text, images, multimedia, and interactive elements, all structured using XHTML tags and attributes.