XHTML: A Stricter, More Compatible Markup Language | Definition & Best Practices

XHTML stands for Extensible Hypertext Markup Language. It's a markup language used for creating web pages and is considered a stricter version of HTML (Hypertext Markup Language). XHTML is designed for better compatibility with XML (Extensible Markup Language) and utilizes the same syntax as HTML, but with additional rules and requirements. XHTML documents must be well-formed and adhere to strict syntax rules, making them easier for web browsers and other software to parse and process. Moreover, XHTML's improved accessibility and search engine-friendliness make it a preferred choice for modern web development.

XHTML Tag Attributes: Lowercase is Essential

No, XHTML tag attributes should always be written in lowercase. This is because XHTML is based on XML, which is a case-sensitive language. Writing attributes in uppercase can lead to errors and render the document invalid. It's recommended to consistently use lowercase for all XHTML tag attributes.