HyperText Markup Language (HTML) is the language used to create web pages and other types of documents viewable in a browser. More precisely, HTML is the language that describes the structure and the semantic of a document.
HTML5 is the latest evolution of the standard that defines HTML. The term represents two different concepts:
Designed to be usable by all Open Web developers, this reference page links to numerous resources about HTML5 technologies, classified into several groups based on their function.