XHTML 1.0

XHTML 1.0 is a markup language used to create websites, combining the structure of HTML with the strict rules of XML. It ensures web pages are more consistent and easier to process by computers, promoting better compatibility across different browsers and devices. XHTML requires exactly proper tag syntax, case sensitivity, and well-formed code, making websites more reliable and easier to maintain. Essentially, it's a more disciplined way to build web pages, helping developers produce clearer, more standardized content that looks and functions well everywhere.