While modern developers primarily use , understanding XHTML (Extensible Hypertext Markup Language) is vital for writing clean, standards-compliant code. Beginning HTML with CSS and XHTML - Springer Nature
Every page starts with a basic structure, including the declaration, followed by the , , and tags.
The Ultimate Modern Guide to HTML, CSS, and XHTML: Your Path to Web Mastery
This guide distills the essentials you need to go from a total beginner to a confident creator. 1. HTML: The Skeleton of the Web