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Whiteboard: UdanaxGreen last revised by 64.6.32.173 on Aug 17, 2005 3:52 am

Udanax-green represents the particular back-end implementation discussed in Ted Nelson's book Literary Machines. It was started in 1981 and developed until 1988 when efforts switched to the Udanax-gold implementation in Smalltalk.

Development Status

Udanax-Green consists of 18,212 lines of ANSI C code spread across 66 source files totaling 507 KB. It relies upon the tree-structure called the enfilade for it's internal design. The Udanax-Green code does compile and run under Linux, and you can use the Python-based front-end included with it to view and edit documents. There is however, a timing bug in the Python front-end that prevents socket communications with the back-end from another machine.

The name green comes from the code's relative newness and lack of finish. The implementation currently lacks the following features:

  • any user identification/authentication/access control facility

  • historical trace

  • any accounting system for allocating access charges

  • any form of back-end to back-end communications

  • the ability to store more than a few hundred megabytes of text, due to a simplistic bitmap allocation scheme

Reading List
As We May Think, 1945 Vannevar Bush
Augmenting Human Intellect:A Conceptual Framework, 1962 Doug Engelbart
Literary Machines, 1981, 87, 93 Ted Nelson
Engines of Creation, Chapter 14 The Network of Knowledge, 1986, 87 K. Eric Drexler
Hypertext Publishing and the Evolution of Knowledge, 1986 K. Eric Drexler
SF:EarthWeb, 1999 Marc Stiegler

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