![]() The coded symbols would enable the Memex to index, search, and link content to create and follow associative trails. ![]() A Memex would hypothetically store - and record - content on reels of microfilm, using electric photocells to read coded symbols recorded next to individual microfilm frames while the reels spun at high speed, and stopping on command. In 1945, Vannevar Bush wrote an article in The Atlantic Monthly called " As We May Think", about a futuristic proto-hypertext device he called a Memex. In 1941, Jorge Luis Borges published " The Garden of Forking Paths", a short story that is often considered an inspiration for the concept of hypertext. Main articles: History of hypertext and Timeline of hypertext technology The most famous implementation of hypertext is the World Wide Web, written in the final months of 1990 and released on the Internet in 1991. Hypertext can be used to support very complex and dynamic systems of linking and cross-referencing. Some implementations support transclusion, where text or other content is included by reference and automatically rendered in place. A lesser known feature is StretchText, which expands or contracts the content in place, thereby giving more control to the reader in determining the level of detail of the displayed document. Links used in a hypertext document usually replace the current piece of hypertext with the destination document. A well-constructed system can also incorporate other user-interface conventions, such as menus and command lines. Static hypertext can be used to cross-reference collections of data in documents, software applications, or books on CDs. Hypertext documents can either be static (prepared and stored in advance) or dynamic (continually changing in response to user input, such as dynamic web pages). Nelson, Literary Machines, 1992 Types and uses of hypertext 'Hyper-' refers to structure and not size." There is no implication about size- a hypertext could contain only 500 words or so. 'Hyper-' is used in the mathematical sense of extension and generality (as in 'hyperspace,' 'hypercube') rather than the medical sense of 'excessive' ('hyperactivity'). As implemented on the Web, hypertext enables the easy-to-use publication of information over the Internet. Hypertext is one of the key underlying concepts of the World Wide Web, where Web pages are often written in the Hypertext Markup Language (HTML). Apart from text, the term "hypertext" is also sometimes used to describe tables, images, and other presentational content formats with integrated hyperlinks. Hypertext documents are interconnected by hyperlinks, which are typically activated by a mouse click, keypress set, or screen touch. Hypertext is text displayed on a computer display or other electronic devices with references ( hyperlinks) to other text that the reader can immediately access. Douglas Engelbart in 2009, at the 40th anniversary celebrations of " The Mother of All Demos" in San Francisco, a 90-minute 1968 presentation of the NLS computer system which was a combination of hardware and software that demonstrated many hypertext ideas List of concept- and mind-mapping softwareĮngineer Vannevar Bush wrote " As We May Think" in 1945 in which he described the Memex, a theoretical proto-hypertext device which in turn helped inspire the subsequent invention of hypertext.Documents that are connected by hyperlinks For the literary concept, see Metafiction.
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