Xanadu

Introductory videos

Playlist Of Ted explaining Xanadu.

Key People: Ted Nelson, others...

Visible Connections / Visual Parralelism

Name

Xanadu is anemd after a Palace of Kublai Khan, a Mongle ruler of the Yuan Dynasty of china, 1264 to 1294. It is a reference to the poem Kubla Khan: or A Vision in a Dream. Apparently it means the "magical place of literary memory" although im not sure why.

Lump file Vs Send for file

The principle of Indirection.

In a lump file, the hyper layer is incorporated into the content layer. In HTML, you may set some text as a title with the <h1> tag, and you may ancar some text to somewere else with an <a> tag, but the former is content level, and the latter is hyper level. How in this scheme can you have backlinks? These kinds of connections are nesseseraly one way.

If, however we seperate out the hyper level information from the content level information we can enable two way links. In xanadu the document has a list of content, (CONTENT PORTION ADDRESS) called an Edit Decision List (EDL). This list is loaded, then the portions are sent for. Thus document structure and its content are uncoupled, identical content can appear in multiple documents, and thus the two way link semantics is at hand.

Structure: Jhon McPhee

Implementations

someone elses notes

The Hypertransaction System at Keio University

This was an indirect document hypertext system that included a payment system, were by readers would pay authors for the sections of their work that they revived, regardless of the EDL that pulled it in.

OpenXanadu

Avalable online accsessable via a web browser. A simulated inderect document.

Xanadu Cambridge

Ted has a video demonstrating this system.

Xanadu Classic

Both an operating system and a document management system. Not sure what that means exactly.

It uses Tumblers to label items, allowing for arbitrary insertion.

Enfilade, a tree structure documents so that editing is referential rather then direct. This make handling large documents more tractable.

Enfilades should have a "downward property" like rearranging text, and an "upward property" like inserting text.

Grandfelade, system for managing the data accross the network.

Spanfelade, manages all the spase in a document. It is the union of all its spans. comparing documents means finding the union of there spanfelade.

Pommfilade manages each document as a permutation matrix of texts and links. The matrix is represented in thumbelers.

There is some documentation for this system.

There is an implementation of a backend Udanax Greene.

Xanadu Space

This looks very cool but completely insane. Maybe in VR. Very impressive. Sounds like the software is so complex, progress on it is intractable

Containing:Introductory videos

Name

Lump file Vs Send for file

Implementations

Published:6 mo. ago Monday, March 25th, 2024

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