Ted Nelson / Concepts & Prototypes


1965, Side-by-side connected comparison of parallel documents


1972, Transpointing windows


1999, PYXI viewer by Ka-Ping Yee


2014, OpenXanadu by Ted Nelson and Nicholas Levin

Key concepts
Xanalogical structure
Parallel documents / Transpointing windows
Annotation
Deep links
Deep versioning and re-use (transclusion)
Xanalinks
Stretchtext
Intertwingledness

Links
http://ted.hyperland.net
http://xanadu.com/xUniverse-D6
http://xanadu.com.au/ted/XUsurvey/xuDation.html
http://xanadu.com/XUarchive/htn8.tif
JS implementation of Stretchtext
ZigZag database system