Hypertext Markup Language (HTML), often called hypertext for short, is a text-based mark-up language for structuring content such as texts, images and hyperlinks in documents. HTML documents are the basis for the World Wide Web and are displayed in a web browser. Along with the web page information that the browser displays, HTML contains additional information in the form of meta-information that provides details, e.g., about the language used in the text or the author or which summarises the content of the text. The current version of HTML is 4.01. HTML5 is in development.