What it is and the problem it solves
Ted Nelson invented hypertext and hypermedia to solve the problem of untraceable, unversioned, unattributable digital text.
How it works
Nelson’s system used two-way links: every link stored both source and destination, so each node knew what other nodes linked to it.
What works
The two-way link remains a coherent technical idea. It solves the problem of lost provenance and enables bidirectional navigation — features HTML lacks by design.
What does not
It does not prevent broken links in practice, because no operational implementation ever ran at scale. It does not provide version or rights management in production, because those features remained theoretical.
What it changes
It changes how we frame the web’s design debt: the one-way link is not inevitable but a deliberate simplification that discarded traceability, context, and ownership.
Is it worth your time
It is not worth your time as a working system — Project Xanadu was never fully built or deployed.